CN103048843A - Continuous variable quantum state frequency transformation device - Google Patents
Continuous variable quantum state frequency transformation device Download PDFInfo
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- CN103048843A CN103048843A CN2012105536406A CN201210553640A CN103048843A CN 103048843 A CN103048843 A CN 103048843A CN 2012105536406 A CN2012105536406 A CN 2012105536406A CN 201210553640 A CN201210553640 A CN 201210553640A CN 103048843 A CN103048843 A CN 103048843A
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Abstract
The invention relates to a continuous variable quantum state frequency transformation device, which comprises a pump light source, wherein laser output by the pump light source is divided into two beams, one laser beam is coupled to input continuous variable light field quantum state after passing through a light intensity control system and a beam coupling system in sequence, frequency transformation quantum state is generated through a pattern matching system and a nonlinear optical resonator, and the frequency transformation quantum state enters a balance zero-beat measuring system through a beam collimation system and a light field filter system; the outer laser beam output by the pump light source is coupled to input local light field after passing through a second light intensity control system and a second beam coupling system in sequence, frequency transformation local light field is generated through a second pattern matching system and a second nonlinear optical resonator, and the frequency transformation local light field enters the balance zero-beat measuring system through a second beam collimation system and a second light field filter system. The device can realize continuous variable quantum state frequency transformation with high efficiency and high fidelity, and is not sensitive to extra-noise of pump light.
Description
Technical field
The present invention relates to continuous variable quantum optics and quantum information field, specifically a kind of continuous variable quantum state frequency-transposition arrangement.
Background technology
Obtain at present people's very large attention based on the quantum information network of light field and atomic system, and obtained stem-winding progress.The velocity of propagation that light field owing to have is exceedingly fast and faint eliminating coherence characteristic etc. are suitable for the carrier as quantum state, grow Distance Transmission; And atom is owing to have the long storage that is suitable for quantum state coherence time.For the quantum information network of future based on light field and atomic system, quantum state need to carry out Hi-Fi mutual transfer between different physical supports.In actual environment, each node of quantum information network is made of different physics systems usually, thereby has different optical signature frequencies.Therefore, can realize that optical state carries out the high fidelity translation function between the different optical frequency quantum interface device will be the important element of following quantum information network.For example, in the quantum information network, quantum state need to shift between atom carrier and light field carrier; And shift between the light field of different carrier wavelength.Utilize the frequency transform techniques of optical state, just the quantized system of different operating wavelength can be linked to each other.The quadrature component of light field has the structure of continuous spectrum, belongs to the continuous variable category, has epochmaking application in quantum optics and quantum information field.
Patent " Conversion of quantum information from one photonic representation to anotherphotonic representation; Patent No.:US 7; 449; 672 B2 " has proposed the method and apparatus about the quantum information frequency transformation of photon, but the carrier of related quantum information is only limited in this patent: the polarization of photon, photon number, time interval, and angular momentum, do not comprise the quadrature component of light field.It is one of effective scheme of realizing the frequency transformation of continuous variable optical state based on the optical second order nonlinearity optical frequency conversion technology.Document " Observation of quantum frequencyconversion; Phys.Rev.Lett.68; 2153 (1992) " reported by pulse optics and frequently process a branch of in the non-classical twin light beam carried out frequency transformation, experimentally observe between light field after the frequency transformation and the residue light beam in the twin light beam and exist non-classical intensity correlation.Therefore in above-mentioned experimental program, the equal single of pump light and flashlight passes nonlinear medium and interacts, and required pumping light field must be the short pulse light field with high-peak power, and is the situation of continuous wave light field and inapplicable for the pumping light field.Document " Frequency conversion of an entangled state, Phys.Rev.A 73,033817 (2006) " theoretical analysis utilize and frequently change on the quantum state frequency of process implementation continuous variable Entangled State.The document has been introduced resonator cavity, thereby strengthened nonlinear interaction, be applicable to the quantum state frequency transformation under the continuous wave situation, weak point is that resonator cavity all resonates to the signal light field of input with the upper conversion of frequency light field, because the restriction of chamber live width, this scheme is only suitable for the quantum state frequency transformation in the arrowband, has very large limitation.Document " Frequency conversion of continuous variablequantum states; J.Opt.Soc.Am.B 25; 269 (2008) " theoretical analysis based on the broadband continuous wave continuous variable quantum state frequency transformation of resonator cavity, and studied the impact of the extra fluctuation noise of pump light on the quantum state frequency transformation, but the document does not propose how effectively to overcome the adverse effect that the extra fluctuation noise of pump light is brought.In practice, usually exist larger extra fluctuation noise as the LASER Light Source of heavy pumping light, this will greatly affect and reduce the frequency transformation fidelity of continuous variable optical state.
Summary of the invention
The object of the present invention is to provide the continuous variable quantum state frequency-transposition arrangement of a kind of compact conformation, good stability.This device can be realized efficient, high fidelity frequency up-converted or the down conversion of continuous variable optical state, and the fidelity of quantum state frequency transformation is insensitive to the extra fluctuation noise of pumping light field.
A kind of continuous variable quantum state frequency-transposition arrangement provided by the invention, comprise pump light source, first, second intensity control system, first, second light beam coupling system, first, second pattern matching system, first, second nonlinear optics resonator, first, second passing through a collimating system, first, second light field filtering system, the balance homodyne detection system; The beam of laser of described pump light source output is successively through being coupled with the continuous variable optical state of inputting after the first intensity control system and the first light beam coupling system, produce frequency transformation quantum attitude through first mode matching system and the first nonlinear optics resonator, frequency transformation quantum attitude enters the balance homodyne detection system through the first passing through a collimating system and the first light field filtering system; Another Shu Jiguang of pump light source output is successively through being coupled with the local light field of inputting after the second intensity control system and the second light beam coupling system, produce the local light field of frequency transformation through the second pattern matching system and the second nonlinear optics resonator, the local light field of frequency transformation enters the balance homodyne detection system through the second passing through a collimating system and the second light field filtering system;
Described pump light source is the single-frequency continuous wave LASER Light Source;
Described the first nonlinear optics resonator and the second nonlinear optics resonator consist of by nonlinear medium, the long locking system in chamber and two catoptrons at least, one of them catoptron is fixed on the piezoelectric ceramics, be coated with antireflective film to pump light and flashlight as the catoptron outside surface of input coupling, inside surface is coated with the high transmittance film of flashlight, the part reflectance coating of pump light and the high transmittance film of frequency inverted light; Catoptron inside surface as the output coupling is coated with the high transmittance film to flashlight, the highly reflecting films of pump light and the high transmittance film of frequency inverted light, and outside surface is coated with the antireflective film to flashlight and frequency inverted light; Remaining catoptron inside surface is coated with the highly reflecting films to flashlight, pump light and frequency inverted light; Two surfaces of nonlinear medium are coated with the antireflective film to flashlight, pump light and frequency inverted light.
Described the first light field filtering system and the second light field filtering system be by realizing the high transmission of frequency inverted light, and at least one plane mirror of the high reflection of second harmonic of pump light, flashlight and pump light is consisted of.
Described the first light beam coupling system and the second light beam coupling system consist of by 45 degree plane mirrors of two sides plated film, the plane of incidence that wherein pump light is corresponding is coated with 45 degree pump light antireflective films, and the plane of incidence that flashlight is corresponding is coated with the high transmittance film of 45 degree flashlight highly reflecting films and pump light.
In apparatus of the present invention, the first intensity control system and the second intensity control system are used for accurately controlling the light intensity of pump light to realize the frequency transformation of Optimal Quantum attitude; The first light beam coupling system and the second light beam coupling system are used for coupling pumping light and flashlight, so that the path spacing of two light beams overlaps fully; First mode matching system and the second pattern matching system are used for realizing that the spatial model of pump light and flashlight is to the pattern match of the first nonlinear optics resonator and the second nonlinear optics resonator; The first nonlinear optics resonator and the second nonlinear optics resonator are used for realizing efficient, the high fidelity quantum state frequency transformation of signal light field and the frequency transformation of local light field; The first passing through a collimating system and the second passing through a collimating system are used for the light field of dispersing of the first nonlinear optics resonator and the second nonlinear optics resonator outgoing is collimated; The first light field filtering system and the second light field filtering system are used for the second harmonic light field of remaining pump light, flashlight and pump light in the first passing through a collimating system and the second passing through a collimating system output light field is filtered out fully, only allow the frequency transformation light field is lossless to be passed through; The balance homodyne detection system is used for the quadrature component information of look-in frequency conversion optical state.
Compared with prior art, advantage of the present invention and effect:
Continuous variable quantum state frequency-transposition arrangement of the present invention, behind flashlight continuous variable quantum state and corresponding local this device of light field incident, can realize the frequency transformation of efficient, Hi-Fi continuous variable quantum state and the balance homodyne detection of frequency transformation quantum attitude, this device is insensitive to the extra fluctuation noise of pumping light field simultaneously.
Continuous variable quantum state frequency-transposition arrangement of the present invention in the frequency transformation of picked up signal light quantum attitude, can be realized the frequency transformation of local light field, efficiently solves frequency transformation quantum attitude is carried out the required local light field problem of balance homodyne detection.
Continuous variable quantum state frequency-transposition arrangement of the present invention, the pump light source of the frequency conversion process of flashlight quantum state and local light field comes from same laser instrument, thereby the extra fluctuation noise of pump light source will be transferred in frequency transformation light field and the corresponding local light field simultaneously, because balance homodyne detection is only relevant with the relative phase of local light field and signal light field, the extra fluctuating phase noise that comes from common pump light source will be cancelled, so this device can effectively overcome the extra phase noise of pumping light field to the adverse effect of continuous variable quantum state frequency conversion process.
Description of drawings
Fig. 1 continuous variable quantum state frequency-transposition arrangement synoptic diagram
The noise power spectrum of Fig. 2 input signal optical state, A are the quadrature amplitude noise power spectrum, and B is quadrature position phase component noise power spectrum
The noise power spectrum of Fig. 3 frequency transformation optical state, A are the quadrature amplitude noise power spectrum, and B is quadrature position phase component noise power spectrum
Embodiment
A kind of continuous variable quantum state frequency-transposition arrangement, as shown in Figure 1: comprise pump light source 1, the first intensity control system 2, the first light beam coupling system 3, first mode matching system 4, the first nonlinear optics resonator 5, the first passing through a collimating system 6, the first light field filtering system 7, the second intensity control system 8, the second light beam coupling system 9, the second pattern matching system 10, the second nonlinear optics resonator 11, the second passing through a collimating system 12, the second light field filtering system 13 and balance homodyne measuring system 14; Pump light source 1 adopts 1550 nanometer single-frequency continuous wave fiber lasers, its Output of laser is divided into two parts, wherein beam of laser is successively through being coupled with the 532 nanometer continuous variable coherent state light S that input after the first intensity control system 2 and the first light beam coupling system 3, produce 810 nanometer frequency transformation quantum attitudes through first mode matching system 4 and the first nonlinear optics resonator 5 again, frequency transformation quantum attitude enters balance homodyne detection system 14 through the first passing through a collimating system 6 and the first light field filtering system 7; Another Shu Jiguang of pump light source 1 output is successively through being coupled with the local light field L of 532 nanometers of input after the second intensity control system 8 and the second light beam coupling system 9, produce the local light field of 810 nanometer frequency transformations through the second pattern matching system 10 and the second nonlinear optics resonator 11, the local light field of frequency transformation enters balance homodyne detection system 14 through the second passing through a collimating system 12 and the second light field filtering system 13; 810 nanometer frequency transformation quantum attitudes are measured through balance homodyne detection system 14; The first intensity control system 2 and the second intensity control system 8 form by half-wave plate and polarization beam splitter prism; The first light beam coupling system 3 and the second light beam coupling system 9 consist of by the plane mirror of two sides plated film, the pump light plane of incidence is coated with 1550 nanometer S polarizations, 45 degree antireflective films, and the flashlight plane of incidence is coated with 532 nanometer S polarizations, 45 degree high-reflecting films and 1550 nanometer S polarizations, 45 degree high transmittance films; The resonator cavity of the first nonlinear optics resonator 5 and the second nonlinear optics resonator 11 consists of by two mirror standing-wave cavities, input coupled mirrors outside surface is coated with 532,1550 nanometer antireflective films, input coupled mirrors inside surface is coated with 532, the part reflectance coating of the high transmittance film of 810 nanometers and 1550 nanometers, output coupled mirrors inside surface is coated with 532, the highly reflecting films of 810 nanometer high transmittance films and 1550 nanometers, output coupled mirrors outside surface is coated with 810, the high transmittance film of 532 nanometers, two logical light end faces of nonlinear crystal are coated with 532, the piezoelectric ceramics that the antireflective film of 1550 and 810 nanometer lasers, the error electric signal of the long locking system in chamber feed back on the catoptron realizes that chamber length and the pump light of nonlinear optics resonator resonate; The first light field filtering system 7 and the second light field filtering system 13 consist of by the plane filtering sheet of three double-sided coatings, wherein the front surface of first filter plate is coated with 810 nanometer high transmittance films and 532 nanometer high-reflecting films, the rear surface is coated with 810 nanometer antireflective films, the front surface of second filter plate is coated with 810 nanometer high transmittance films and 1550 nanometer high-reflecting films, the rear surface is coated with 810 nanometer antireflective films, the front surface of the 3rd filter plate is coated with 810 nanometer high transmittance films and 775 nanometer high-reflecting films, and the rear surface is coated with 810 nanometer antireflective films.
Fig. 2 is the quadrature amplitude of 532 nanophase dry state signal light fields of incident apparatus of the present invention of experiment measuring and the fluctuation noise power spectrum (normalizing to corresponding standard quantum limit noise) of quadrature position phase component.Can find out that when analysis frequency was above greater than 6MHz, the fluctuation noise of the quadrature amplitude of 532 nanowire signal light fields and quadrature position phase component all overlapped with corresponding standard quantum limit noise, is coherent state.
Fig. 3 is the quadrature amplitude of frequency transformation 810 nanometer optical states of apparatus of the present invention output and the fluctuation noise power spectrum of quadrature position phase component.Can find out that at analysis frequency during greater than 6MHz, the fluctuation noise of the quadrature amplitude of 810 nanowire signal light fields and quadrature position phase component all overlaps with corresponding standard quantum limit noise, is coherent state.Measuring corresponding 532 nanowire signal light fields in the experiment is 86% to the average photon-photon conversion efficiency of 810 nanometer frequency transformation light fields.Therefore utilize apparatus of the present invention can realize that 532 nanophase dry states are to efficient, the high fidelity frequency transformation of 810 nanophase dry states.Simultaneously, in frequency conversion process, exist classical fluctuation noise much larger than standard quantum limit at analysis frequency 2MHz-20MHz place (when measuring power and be the 8 milliwatt left and right sides as 1550 nanometer light fields of pump light, corresponding noise is higher than more than the standard quantum noise limit 10dB-20dB), thus confirmed that apparatus of the present invention are insensitive to the extra fluctuation noise of pumping light field.
Claims (3)
1. continuous variable quantum state frequency-transposition arrangement, it is characterized in that, comprise pump light source (1), the beam of laser of pump light source (1) output is successively through being coupled with the continuous variable optical state S that inputs after the first intensity control system (2) and the first light beam coupling system (3), produce frequency transformation quantum attitude through first mode matching system (4) and the first nonlinear optics resonator (5), frequency transformation quantum attitude enters balance homodyne detection system (14) through the first passing through a collimating system (6) and the first light field filtering system (7); Another Shu Jiguang of pump light source (1) output is successively through being coupled with the local light field L that inputs after the second intensity control system (8) and the second light beam coupling system (9), produce the local light field of frequency transformation through the second pattern matching system (10) and the second nonlinear optics resonator (11), the local light field of frequency transformation enters balance homodyne detection system (14) through the second passing through a collimating system (12) and the second light field filtering system (13);
Described pump light source (1) is the single-frequency continuous wave LASER Light Source;
Described the first nonlinear optics resonator (5) and the second nonlinear optics resonator (11) consist of by nonlinear medium, the long locking system in chamber and two catoptrons at least, one of them catoptron is fixed on the piezoelectric ceramics, be coated with antireflective film to pump light and flashlight as the catoptron outside surface of input coupling, inside surface is coated with the high transmittance film of flashlight, the part reflectance coating of pump light and the high transmittance film of frequency inverted light; Catoptron inside surface as the output coupling is coated with the high transmittance film to flashlight, the highly reflecting films of pump light and the high transmittance film of frequency inverted light, and outside surface is coated with the antireflective film to flashlight and frequency inverted light; Remaining catoptron inside surface is coated with the highly reflecting films to flashlight, pump light and frequency inverted light; Two surfaces of nonlinear medium are coated with the antireflective film to flashlight, pump light and frequency inverted light.
2. a kind of continuous variable quantum state frequency-transposition arrangement as claimed in claim 1, it is characterized in that, described the first light beam coupling system (3) and the second light beam coupling system (9) consist of by 45 degree plane mirrors of two sides plated film, the plane of incidence that wherein pump light is corresponding is coated with 45 degree pump light antireflective films, and the plane of incidence that flashlight is corresponding is coated with the high transmittance film of 45 degree flashlight highly reflecting films and pump light.
3. a kind of continuous variable quantum state frequency-transposition arrangement as claimed in claim 1, it is characterized in that, described the first light field filtering system (7) and the second light field filtering system (13) be by realizing the high transmission of frequency inverted light, and at least one plane mirror of the high reflection of second harmonic of pump light, flashlight and pump light is consisted of.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110658634A (en) * | 2019-08-28 | 2020-01-07 | 西安空间无线电技术研究所 | Processing system and method for continuously variable polarization and orbital angular momentum hybrid entanglement |
| CN111207667A (en) * | 2020-01-20 | 2020-05-29 | 山西大学 | Quantum interferometer device based on optical parametric amplifier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030123516A1 (en) * | 2001-10-15 | 2003-07-03 | Steinberg Aephraim M. | Quantum-interferometrically enhanced optical nonlinearities for photon switches and logic gates |
| US20080285115A1 (en) * | 2007-05-18 | 2008-11-20 | Saffman Mark E | Apparatus and method of producing quantum-entangled, up-converted light beams |
| CN102436117A (en) * | 2011-10-14 | 2012-05-02 | 山西大学 | Generation device for continuous variable quantum entanglement source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030123516A1 (en) * | 2001-10-15 | 2003-07-03 | Steinberg Aephraim M. | Quantum-interferometrically enhanced optical nonlinearities for photon switches and logic gates |
| US20080285115A1 (en) * | 2007-05-18 | 2008-11-20 | Saffman Mark E | Apparatus and method of producing quantum-entangled, up-converted light beams |
| CN102436117A (en) * | 2011-10-14 | 2012-05-02 | 山西大学 | Generation device for continuous variable quantum entanglement source |
Non-Patent Citations (2)
| Title |
|---|
| YONGMIN LI,ET AL.: "Frequency conversion of continuous variable quantum states", 《J. OPT. SOC. AM. B》 * |
| 彭堃墀: "连续变量量子态的光学操控", 《光学学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110658634A (en) * | 2019-08-28 | 2020-01-07 | 西安空间无线电技术研究所 | Processing system and method for continuously variable polarization and orbital angular momentum hybrid entanglement |
| CN110658634B (en) * | 2019-08-28 | 2021-10-01 | 西安空间无线电技术研究所 | Processing system and method for continuously variable polarization and orbital angular momentum hybrid entanglement |
| CN111207667A (en) * | 2020-01-20 | 2020-05-29 | 山西大学 | Quantum interferometer device based on optical parametric amplifier |
| CN111207667B (en) * | 2020-01-20 | 2021-05-14 | 山西大学 | Quantum interferometer device based on optical parametric amplifier |
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