WO2020141536A1 - Système et procédés pour mesurer des accélérations linéaires et rotationnelles et d'intensités de champ magnétique à l'aide d'atomes individuels dans un réseau optique formé par des lasers - Google Patents

Système et procédés pour mesurer des accélérations linéaires et rotationnelles et d'intensités de champ magnétique à l'aide d'atomes individuels dans un réseau optique formé par des lasers Download PDF

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WO2020141536A1
WO2020141536A1 PCT/IL2020/050012 IL2020050012W WO2020141536A1 WO 2020141536 A1 WO2020141536 A1 WO 2020141536A1 IL 2020050012 W IL2020050012 W IL 2020050012W WO 2020141536 A1 WO2020141536 A1 WO 2020141536A1
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Prior art keywords
atoms
quantum
optical lattice
atom
metrology device
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PCT/IL2020/050012
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English (en)
Inventor
Igor KUZMENKO
Tetyana KUZMENKO
Yehuda BAND
Yishai AVISHAI
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B.G. Negev Technologies And Applications Ltd.
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Publication date
Priority claimed from IL264115A external-priority patent/IL264115A/en
Priority claimed from IL265128A external-priority patent/IL265128A/en
Application filed by B.G. Negev Technologies And Applications Ltd. filed Critical B.G. Negev Technologies And Applications Ltd.
Publication of WO2020141536A1 publication Critical patent/WO2020141536A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/093—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by photoelectric pick-up
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/24—Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58—Turn-sensitive devices without moving masses

Definitions

  • the present invention relates to quantum mechanical devices and their usage for metrology.
  • One of the central tasks in physics is metrology, the measurement of physical quantities with high accuracy.
  • Providing a high accuracy magnetometer is a central goal in contemporary magnetic research since weak magnetic fields are of interest in physics, chemistry, medicine, biology, communications, information technology, security equipment, and the like.
  • the accuracy to which magnetic fields may be measured is of utmost importance, and in many cases, such as in medical diagnosis and for detecting terrorist activity, the accuracy is crucial.
  • QR quantum rotor
  • ultra-cold atoms trapped in spin-dependent optical lattices do behave as elementary QRs. It is well established that ultra-cold atoms may be created by vaporizing the atoms and then removing photons from each atom in the vapor phase to slow down its trajectory. These atoms may then be trapped by an array of coherent lasers that create standing waves that form optical lattices. Such trapped ultra-cold atoms have been used to investigate fundamental properties of quantum many-body systems. In particular, the high degree of control of experimental parameters has allowed the study of many phenomena such as quantum phase transitions and quantum spin dynamics.
  • This control can be extended down to the most fundamental level of a single spin at a specific site of an optical lattice [20]
  • a Mott insulator with sub-diffraction-limited resolution, well below the lattice spacing.
  • the Mott insulator generated a large two-dimensional array of perfectly arranged atoms, in which arbitrary spin patterns can be generated by sequentially addressing selected lattice sites after freezing out the atom distribution.
  • the wave function of a quantum motor atom in a 2-dimensional spin-dependent optical lattice can be expanded as follows:
  • r is the radial coordinate and f is the polar coordinate of the QR atom around a minimum of the scalar potential of the optical lattice, Yn z o(F) is the radial wave function and c
  • s( ⁇ ) are spin or eigen functions of the radial component of the total internal atomic angular momentum quantum number
  • Atoms having an electronic magnetic moment that are placed in an (ordinary, i.e., non-spin-dependent) optical lattice potential with one atom per lattice site are protected against spin-exchange collisions and therefore they can be used as a magnetometer.
  • Magnetic field strengths may be measured by atoms trapped in an ordinary, i.e. non-spin-dependent lattice. Although any atom having a magnetic dipole moment, that is constrained within an optical lattice with one atom per lattice site may be used, however it will be appreciated that for metrology purposes, the larger the atomic magnetic dipole moment, the more accurate and easier the measurement.
  • Magnetic dipole moments are present in atoms having unpaired electrons in outer orbitals. Atoms of any element having unpaired electrons in outer orbitals may be put into optical lattice sites of either an ordinary (non-spin-dependent) optical lattice or of a spin dependent optical lattice and used for measuring magnetic fields. Since Dysprosium has the largest magnetic moment of any element, it will experience the biggest response to an applied magnetic field.
  • Measurements may be made of the absorption spectra of the atoms in the optical lattice and these may be used to calculate the magnetic field strength.
  • stimulated Raman scattering may be used as a probe for making the appropriate measurements.
  • a quantum rotor may be created by trapping the atom in a two- dimensional spin-dependent optical lattice potential.
  • a lattice may be created by near-resonant coherent counter-propagating laser beams, having a coherent superposition of polarizations. The motion of such an atom is constrained within a narrow annulus centered at a potential minimum.
  • the energy levels of such trapped QR atoms within singly occupied spin-dependent optical lattice sites are not only sensitive to an external magnetic field, but are also sensitive to inertial effects such as linear acceleration, angular velocity and angular acceleration.
  • such quantum rotors may be used as accelerometers for measuring linear acceleration, or as rotation sensors (gyroscopes) for the inertial measurement of angular velocity and angular acceleration. Since the gravitational field is a special form of linear acceleration, gravitational field strength may also be measured by this technique.
  • some embodiments of the invention are based on the novel and unexpected finding that both bosonic and fermionic cold atoms may be trapped within spin- dependent 2D optical lattice potentials formed by a plurality of near-resonant coherent counter-propagating laser beams, such as three, four or six near-resonant coherent counter-propagating laser beams, with a coherent superposition of polarizations that creates an optical lattice having triangular, square or hexagonal symmetry, and when an atom is trapped in a lattice point of the spin dependent optical lattice created by the laser array that serves as a potential well, it behave as an elementary QR.
  • near-resonant coherent counter-propagating laser beams such as three, four or six near-resonant coherent counter-propagating laser beams
  • aspects of the present invention provide elementary quantum rotors, arrays of such quantum rotors and methods for producing such elementary quantum rotors. It has further been found that when compensating for gravity effects and other accelerations, an elementary QR of the invention or an array thereof, can be used as a magnetometer for measuring magnetic fields having a theoretical accuracy of DB 10 -24 Tesla. Thus, in another of its aspects, the present invention provides magnetometers.
  • Such elementary quantum rotors may be used as accelerometers to measure acceleration, or as gravitometers. Furthermore, when the direction of rotation is both ways [clockwise and counterclockwise], a gyroscope is provided. Such a gyroscope may be used to measure angular velocity.
  • an aspect of the invention is directed to providing a QR comprising an atom trapped in a 2-dimensional array of electro-magnetic waves stabilized by two or more pairs of coherent lasers wherein the atom has a non-zero total internal atomic angular momentum, and wherein the atom is trapped by a spin-dependent optical lattice potential, and to arrays of such quantum rotors.
  • Individual atoms of an element may be isolated by vaporizing the element at low pressure and then ultra-cooling the individual atoms by ejecting photons therefrom.
  • Suitable atoms may be selected from the list of 2 H atoms, 6 Li, 23 Na atoms, 40 K atoms, 7 Li atoms, 23 Na atoms, or 39 K atoms.
  • the atom is an alkali atom.
  • the atom is lithium.
  • the QR system comprises an array of single atom QRs each trapped in a separate lattice potential site within the two-dimensional array.
  • each lattice site traps one atom.
  • the two-dimensional array is created by six coherent lasers and has hexagonal symmetry.
  • the two-dimensional array is created by four coherent laser beams, and has square symmetry. In yet another embodiment, the two-dimensional array is created by three coherent laser beams and has triangular symmetry.
  • the array comprises identical atoms selected from the list of 2 Hatoms, Liatoms, Na atoms, K atoms, Liatoms, Naatoms, Katoms or Rb atoms.
  • the quantum rotor may be used as part of a magnetometer for determining the strength B ex of an external magnetic field.
  • a magnetometer comprises: (a) a QR system comprising a two-dimensional array of atoms;
  • each atom has a non-zero total internal atomic angular momentum, and wherein each atom is trapped by a spin-dependent optical lattice potential;
  • rotational and linear accelerations of the quantum rotor are preferably suppressed or compensated for.
  • Another aspect of the invention is directed to using a quantum rotor for measuring linear acceleration by suppressing or compensating for magnetic fields whilst monitoring shifts in absorption energy peaks of the absorption spectra of a quantum rotor array that are due to the linear acceleration.
  • Yet another aspect of the invention is directed to a method of measuring the force of gravity by measuring the absorption shift of a quantum rotor in an optical lattice due to gravitational acceleration in the x-z plane, preferably whilst compensating for angular acceleration and magnetic field effects.
  • a further aspect is directed to a method of measuring angular velocity W by using a quantum rotor in an inertial frame as a gyroscope, and preferably compensating for magnetic fields and compensating for angular acceleration, wherein
  • Figs. 1-3 show optical lattice potentials.
  • Fig. 1 is a schematic illustration of a far detuned cubic symmetry optical lattice potential.
  • Fig. 2 shows laser beams with wave vectors q n in the x-y plane generating an optical lattice potential having hexagonal symmetry.
  • the darker disk in the center shows the physical region in which the optical lattice is located.
  • Fig. 3 is a schematic illustration of the optical setup of a ID optical lattice.
  • Fig. 4(a) is a schematic illustration showing how the arrangement of lasers beams of Fig. 1 creates an egg tray like lattice array of potential wells that can each trap a single atom;
  • FIG. 4(b) is a schematic illustration showing the optical lattice potential V(r);
  • f(t) F (t)/
  • the energy levels with n 0, 1, . . . going from bottom to top.
  • FIG. 7 is a schematic illustration of an array of quantum rotors within an optical lattice potential
  • Fig 7(a) is a schematic illustration showing how each atom occupies a potential well and moves in a circular path around the potential minimum in a square optical lattice potential, and is therefore an elementary quantum rotor;
  • Fig. 7(b) is a schematic illustration showing the scalar potential experienced by atoms in a hexagonal optical lattice potential
  • Fig. 7(c) is a schematic illustration showing the imaginary part of the slowly varying envelope of the x and y components of the electric field due a hexagonal optical lattice
  • Fig. 8(a) is a schematic representation of the (0, ⁇ 1/2) (1, ⁇ 1/2) transition absorption lines
  • Fig. 8(b) illustrates how the absorption line of the (0, ⁇ 1/2) (1, ⁇ 1/2) transition is split into four spectral lines by an external magnetic field
  • Fig. 9 is a graphical representation showing the probability of finding the quantum rotor in the state
  • 0, -1/2 ⁇ as a function of time for G0, 1/2 0.05 Wg and different values of
  • : (a) d 0, (b)
  • 0.5Wg. (c)
  • Wg and (d)
  • 1.5 Wg;
  • Fig. 10 is a schematic representation of a quantum rotor in a non-inertial frame that is rotating with an angular velocity W perpendicular to the x-y plane;
  • Fig. 11 is a schematic representation of a magnetometer in accordance with another embodiment of the invention.
  • Fig. 12 is a schematic illustration of a quantum rotor in a non-inertial frame moving with acceleration a in the x-y plane
  • Fig. 13 is a schematic illustration of a quantum rotor in a non-inertial frame rotating with the angular velocity w perpendicular to the x-y plane.
  • the desire to measure physical quantities with high accuracy is well established. Achieving a magnetometer with high accuracy is a central goal of contemporary magnetic research, and has various technological applications. Weak magnetic fields occur in many scenarios and have an effect on many scientific phenomena and has technological applications. The measurement of weak magnetic fields is of interest in physics, chemistry, medicine, biology, communications, information technology, security applications, etc. The accuracy to which magnetic fields can be measured is of utmost importance, and in many cases, such as in medical diagnosis, detecting terrorist activity and the like, may be crucial.
  • the present invention is based on recent advances in quantum mechanics, pertaining to the physics of laser controlled cold atom systems.
  • An electromagnetic field E(r,t) of frequency w 0 and electric field strength E 0 interacts with an atom with transition dipole moment d to yield an interaction energy [1-7]
  • the energy hw a of the ground state of the atom, labeled a, is shifted by an amount [7, 8, 12, 14, 18, 22, 25]
  • a coherent set of counter- propagating laser beams having frequency w 0 that is far-detuned from resonance (so decay due to spontaneous emission is negligible) can produce an electromagnetic potential in the form of a lattice potential for atoms. Schematically, such an optical lattice potential has the form of an egg carton.
  • Fig. 1 is a schematic illustration of a far detuned cubic symmetry optical lattice potential.
  • Fig. 2 is shows laser beams with wave vectors q n in the x-y plane generating an optical lattice array of potentials having hexagonal symmetry.
  • the darker disk in the center shows the physical region in which the optical lattice is located.
  • Fig. 2 schematically shows the construction of such a quantum rotor 1 in accordance with one embodiment of the invention.
  • a two-dimensional array 2 of perfectly arranged atoms 4 The two-dimensional array 2 can be created, for example, by cooling a vapor of individual atoms using ultra cooling techniques, such as those described in [20], for example.
  • the atoms 4 are trapped by a spin-dependent optical lattice potential [7, 8, 12, 14, 18, 19, 27] which, in the example shown in Fig.
  • the resultant electric field is a linear combination of standing waves having both linear and circular polarization and generates a spin-dependent optical lattice potential that is experienced by the atoms.
  • the atoms 4 may be, for example, H, Li, Na, or K atoms, which are fermions, or 7 Li, 23 Na, 39 K, which are bosons; all of which have nonzero F in their ground states [26]
  • N atoms may be put into a ID trapping box of size L and the gas may then be cooled to produce a degenerate Fermi gas.
  • the Fermi energy E F should be equal to the recoil energy E 0 .
  • Fig. 5(a) shows a quantum rotor having some wiggle room, making knowledge of position of the atom uncertain, and thus enabling it to exist with a finite probability without contradicting Heisenberg’s Uncertainty Principle.
  • FIG. 3 a schematic illustration of the optical lattice setup is shown, which for simplicity is illustrated as a 1D optical lattice setup.
  • the laser beam passes through the experiment chamber, and is retro-reflected and guided back into an optical fiber.
  • the optical lattice is formed by interference of these counter-propagating laser beams.
  • another set [or another two sets for hexagonal symmetry - see Fig. 2)] of laser beams that are coherent with the first set are passed through the experiment chamber.
  • This type of spin-dependent optical lattice induces a scalar potential for the atoms, as shown in Fig. 4a, and a (fictitious) magnetic field, as shown in Fig. 4b, that interacts with the atomic spin.
  • a spin-dependent optical lattice which can be filled with precisely one atom per unit cell of the lattice, the quantum-mechanical motion of each atom is constrained within a narrow annulus around the minimum of the scalar potential [see Figs. 5a and 5b]
  • Fig. 7 shows a network of quantum rotors held within the potential wells of an optical lattice.
  • each atom occupies a potential well and travels in a circular motion around the potential minimum of the square optical lattice potential, and is therefore an elementary quantum rotor.
  • Fig. 7(b) the scalar potential experienced by atoms in a hexagonal optical lattice potential is shown, such as that formed with the laser arrangement of Fig. 2.
  • Fig. 7(c) the imaginary part of the slowly varying envelope of the x and y components of the electric field due to the hexagonal optical lattice of Fig. 6(b) is shown.
  • a quantum rotor lattice is an array of such elementary rotors trapped in optical lattice sites, with one atom per lattice site. Calculations of the eigen-energies and eigen-functions of quantum rotors, and their use as sensors are found in the paper to Kuzmenko et al.
  • the interaction between two ground state atoms trapped in different lattice sites is minuscule.
  • the spin-exchange collisions between atoms such as those that occur in a gas of atoms are effectively prevented.
  • the atoms in a quantum rotor array may be made to respond coherently to an external probe and thereby, the observed response is enhanced.
  • the response of a quantum rotor array to an external probe may be computed by analyzing the response of an elementary quantum rotor, and, if the probe is weak, perturbation theory can be used.
  • a quantum rotor array can serve as a magnetometer and/or an accelerometer and/or gravitometer with extremely high precision.
  • the present invention is based on recent advances in quantum mechanics, pertaining to the physics of laser controlled cold atom systems.
  • Atoms having an electronic magnetic moment may be placed in the lattice sites of an ordinary, (non-spin-dependent) two-dimensional optical lattice potential with one atom per site, and are thereby protected against spin-exchange collisions between the atoms and thus can be used as a magnetometer.
  • a special case of atoms in an optical array is encountered when atoms are individually trapped in a two-dimensional spin-dependent optical lattice potential.
  • the trapped atom is known as a quantum rotor, and the motion of such an atom is constrained within a narrow annulus about a potential minimum.
  • the energy levels of such quantum rotor atoms, each trapped within a singly occupied spin-dependent optical lattice site, is not only sensitive to an external magnetic field, but is also sensitive to inertial effects such as a gravitation field or other linear acceleration, and to angular velocity or acceleration. Therefore, as well as use as magnetometers, such quantum rotors and quantum rotor arrays maybe used as accelerometers or as rotation sensors (gyroscopes) for inertial measurement.
  • This approach enables accurate measurement of magnetic fields by, measurement of the frequency of the absorption lines, the precision of the measurement being limited by the precision of the apparatus used to measure the frequencies.
  • the measurements may be achieved by measuring shifts in absorption spectra by scanning appropriate radio frequencies.
  • the inventors have found that when the atoms of a quantum rotor of the invention are exposed to an external magnetic field, the absorption line of the spin-flip quantum transition splits into two spectral lines. Measurement of the frequency splitting can be used to determine the external magnetic field.
  • FIG. 8(a) shows low energy levels e n, z (horizontal lines) and quantum
  • Fig. 8(b) shows splitting of the spectral line 0, ⁇ 1/2 1, ⁇ 1/2.
  • Fig. 8 shows how the absorption line of the (0, ⁇ 1/2) (1, ⁇ 1/2) transition (a) splits into four spectral lines (b).
  • the absorption line of the (0, ⁇ 1/2) -(1, ⁇ 1/2) transition splits into four spectral lines.
  • Fig. 9 is a schematic illustration showing the probability to find the quantum rotor in the state
  • 0, -1/2 )as a function of time for G 0 ,1/2 0.05 Wg and different values of
  • : (a) d 0, (b)
  • 0.5Wg, (c)
  • Wg and (d)
  • 1.5 Wg .
  • Fig. 10 schematically shows a magnetometer 20 in accordance with one embodiment of this aspect of the invention.
  • the magnetometer 20 comprises a quantum rotor 22 of the invention, which may be, for example, the quantum rotor 1 shown in Fig. 2.
  • the magnetometer 20 further comprises an RF (radio frequency) signal generator 24 having an RF transmitting antenna 26
  • the RF generator 22 generates an RF spectrum over the range of 1 KHz to 1 GHz in the vicinity of the quantum rotor 22 This creates double degeneracy of the clockwise and anti-clockwise rotating atoms, which causes shifts in the RF absorption spectrum.
  • An RF detector 28 having a detection antenna 30 detects the output RF field by probing the input RF field after having been modified by the quantum rotor 22.
  • the RF generator 24 and the RF detector 28 are both under the control of the same processor 32
  • the processor 32 is configured to activate the RF generator 24 to generate a magnetic field having a time dependent frequency w.
  • the RF detector 28 is synchronized with the RF generator 24 by the processor 32
  • the RF detector generates a time dependent signal indicative of the intensity of the detected output magnetic field that is input to the processor 32
  • the processor 32 is configured to generate the absorption spectrum of the atomic array in the quantum rotor 22, and to analyze the absorption spectrum to determine the frequency of both of the spectral lines in the absorption spectrum.
  • the processor 32 is further configured to calculate W B , where W B is the difference between the frequencies of the two spectral lines.
  • the processor then calculates the external magnetic field strength B ex , wherein the calculation of B ex involves W B.
  • B ex may be calculated from W B using the following algebraic expression
  • Results generated by the processor such as the absorption spectrum or the calculated values for W B or B ex may then be displayed on a display device such as a screen 34 or printed by a printer.
  • a magnetometer 120 in accordance with a second aspect of the invention is shown.
  • Fig. 11 in a different approach, explained more fully in the paper to Kuzmenko et al., it is noted that the Raman scattering of photons by an electron is affected by the presence of an external magnetic field.
  • intensity of an external magnetic field may be determined by Raman spectroscopy of electrons using a quantum rotor of the invention that is exposed to the external magnetic field.
  • the magnetometer 120 comprises a quantum rotor 122 of the invention, which may be, for example, the quantum rotor 1 shown in Fig. 2.
  • the magnetometer 120 further comprises a laser 124 generating an excitation laser light beam having an excitation frequency w p.
  • a spectrophotometer 128 is positioned to detect light scattered from the quantum rotor 122 and to scan a frequency range to determine an emission spectrum of the quantum rotor 122
  • the spectrophotometer 128 generates a time dependent signal indicative of the emission spectrum that is input to a processor 132
  • the processor 132 is configured to analyze the emission spectrum to determine the frequency w s of the peak in the emission spectrum.
  • the processor 132 calculates B ex , wherein the calculation of B ex involves D B.
  • B ex may be calculated using the algebraic expression:
  • Accelerometer may be displayed on a screen 134, or sent to a printer.
  • the acceleration may be determined by measuring the response of the quantum rotor to RF radiation, through the shift in the absorption spectrum. Alternatively, it can be measured by stimulated Raman scattering between the split ground state of quantum rotors.
  • the fictitious force Ma removes the cylindrical symmetry of the optical lattice and results in the splitting of the ⁇ z degenerate levels.
  • the splitting frequency is measured, and the parallel component of the acceleration a is calculated from the equation
  • the QR rotates clockwise or counterclockwise in a circular trajectory’having radius r.
  • a quantum rotor has been proposed that is created by using an optical lattice to trap the super cooled bosons or fermions.
  • energy levels and probability density of the trapped atom the trapped bosons or fermions may be shown to behave as quantum rotors.
  • Such a quantum rotor has a plethora of practical applications, and may be used as a magnetometer, an accelerometer, a gyroscope or a magnetic wave sensor.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

L'invention concerne un dispositif de métrologie pour une mesure exacte et précise d'une propriété sélectionnée dans le groupe constitué par l'intensité du champ magnétique, l'accélération linéaire et rotationnelle et la force du champ gravitationnel, comprenant un réseau optique créé par des ondes électromagnétiques cohérentes générées par 3, 4 ou 6 lasers cohérents disposés dans un anneau à des intervalles de 120 degrés, 90 degrés ou 60 degrés, et des atomes individuels piégés dans le réseau optique, et un système comprenant un détecteur de ligne d'absorption permettant de surveiller des décalages dans des lignes d'absorption d'atomes à l'intérieur du réseau optique.
PCT/IL2020/050012 2019-01-06 2020-01-05 Système et procédés pour mesurer des accélérations linéaires et rotationnelles et d'intensités de champ magnétique à l'aide d'atomes individuels dans un réseau optique formé par des lasers WO2020141536A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IL264115A IL264115A (en) 2019-01-06 2019-01-06 Quantum rotor created by trapping single atoms in an optical matrix, and use thereof for measuring magentic fields, linear and rotational acceleration and gravity field strength
IL264115 2019-01-06
IL265128 2019-02-28
IL265128A IL265128A (en) 2019-02-28 2019-02-28 System and methods for measuring linear and rotational accelerations and magnetic field strengths using individual atoms within an optical lattice formed by lasers

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023149159A1 (fr) * 2022-02-01 2023-08-10 国立研究開発法人理化学研究所 Dispositif de piège magnétooptique, emballage physique, emballage physique pour horloge à réseau optique, emballage physique pour horloge atomique, emballage physique pour interféromètre atomique, emballage physique pour dispositif de traitement de l'information quantique, et système d'emballage physique

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WO2009073736A1 (fr) * 2007-12-03 2009-06-11 President And Fellows Of Harvard College Magnétomètre à spins

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WO2023149159A1 (fr) * 2022-02-01 2023-08-10 国立研究開発法人理化学研究所 Dispositif de piège magnétooptique, emballage physique, emballage physique pour horloge à réseau optique, emballage physique pour horloge atomique, emballage physique pour interféromètre atomique, emballage physique pour dispositif de traitement de l'information quantique, et système d'emballage physique

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