CN103217804B - Produce the device of one-dimensional single-color dislocation rubidium strontium optical lattice - Google Patents
Produce the device of one-dimensional single-color dislocation rubidium strontium optical lattice Download PDFInfo
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- CN103217804B CN103217804B CN201310154298.7A CN201310154298A CN103217804B CN 103217804 B CN103217804 B CN 103217804B CN 201310154298 A CN201310154298 A CN 201310154298A CN 103217804 B CN103217804 B CN 103217804B
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Abstract
Produce a device for one-dimensional single-color dislocation rubidium strontium optical lattice, its feature is that this device comprises 1064nm laser instrument, half-wave plate, polarization beam splitter prism, the first catoptron, the second catoptron, the 3rd catoptron, the 4th catoptron, 532nm laser instrument, rubidium strontium mixing cold atom cloud, the 5th catoptron and the 6th catoptron.First the present invention forms one dimension rubidium strontium mixed gas with the optical lattice of two-dimentional 1064nm, then on described one dimension rubidium strontium mixed gas, loads 532nm optical lattice.Rubidium atom and the strontium atom of described rubidium strontium mixing cold atom gas are the characteristics of blue off resonance and red off resonance to the light of 532nm respectively, and rubidium atom and strontium atom are trapped in the minimum place of light intensity and maximum respectively, form the rubidium strontium optical lattice of one-dimensional single-color dislocation.
Description
Technical field
The present invention relates to optical lattice, particularly a kind of device producing one-dimensional single-color dislocation rubidium strontium optical lattice.
Background technology
In optical lattice, cold atoms is proved to be a kind of effectively controlled changeable system of unresolved multi-body system in a kind of Simulation of Complex quantum phase and research Condensed Matter Physics.As the example of a highly significant, the super transition flowing to Mott insulation phase has been confirmed by theory and has arrived at Laboratory Observation.In addition, supercool multicomponent gas is that research atom Interspecific interaction and formation of ultra-cold molecules provide new visual angle.Recently, the appearance of complicated quantum phase (be separated, supersolid is equal) makes to mix Bose in optical lattice and Fermi's atom has attracted a large amount of attentions.So far, several group has experimentally been had successfully to be loaded in optical lattice by two kinds of alkali metal atoms.Alkaline metal and (class) alkaline earth metal atom gas are also widely studied, and such as: rubidium ytterbium mixes, lithium ytterbium mixes, rubidium strontium mixing atomic gas etc.More phenomenons are by theoretical prediction and experimental study under this background, and especially Bose Fermi mixed gas forms two Mott insulation is exactly an illustration (see Nat.Phys.7,642 (2011)) mutually.
Summary of the invention
The object of the present invention is to provide a kind of device producing one-dimensional single-color dislocation rubidium strontium optical lattice, simulate comprise two Mott insulation phase that misplaces by simple structure, single Mott insulation surpasses with two component mutually flows in interior complicated quantum phase.
Technical solution of the present invention is as follows:
A kind of device producing one-dimensional single-color dislocation rubidium strontium optical lattice, its feature be this device comprise 1064nm laser instrument, half-wave plate, polarization beam splitter prism and the first catoptron, the second catoptron, the 3rd catoptron, the 4th catoptron, 532nm laser instrument, rubidium strontium mixing cold atom cloud, the 5th catoptron and the 6th catoptron, the linking relationship of above-mentioned device is as follows:
Described half-wave plate and polarization beam splitter prism successively in the Laser output direction of described 1064nm laser instrument, incident light is divided into folded light beam and transmitted light beam by this polarization beam splitter prism, the second catoptron, the 3rd catoptron, rubidium strontium mixing cold atom cloud and the 4th catoptron successively in described folded light beam direction, the light reflected by the 3rd catoptron forms z direction through rubidium strontium mixing cold atom cloud and the 4th catoptron, be rubidium strontium mixing cold atom cloud and the first catoptron successively in described transmitted light beam direction, form x direction;
Described the 5th catoptron, rubidium strontium mixing cold atom cloud and the 6th catoptron successively in the Laser output direction of described 532nm laser instrument, the 5th described catoptron and the laser direction of described 532nm laser instrument at 45 °, the light reflected by the 5th described catoptron passes the 6th catoptron described in the center directive of described rubidium strontium mixing cold atom gas, after the 6th described catoptron reflection, overlap with input beam at the center of described rubidium strontium mixing cold atom gas, form one dimension optical lattice on y direction;
The transmitted light beam of described polarization beam splitter prism passes first catoptron described in the directive of center of described rubidium strontium mixing cold atom gas, after the reflection of this first catoptron, overlap with input beam at the center of described rubidium strontium mixing cold atom gas, form one dimension optical lattice on x direction;
The folded light beam of described polarization beam splitter prism through the second described catoptron, the 3rd catoptron through described rubidium strontium mixing cold atom gas center directive described in the 4th catoptron, after the 4th catoptron reflection, overlap with input beam at the center of described rubidium strontium mixing cold atom gas, form the one dimension optical lattice on z direction;
Rubidium atom and the strontium atom of described rubidium strontium mixing cold atom gas are blue off resonance and red off resonance to the light of 532nm respectively, and rubidium atom and strontium atom are trapped in the minimum place of light intensity and maximum respectively, form the rubidium strontium optical lattice of one-dimensional single-color dislocation.
Effect of the present invention is as follows:
First the present invention forms one dimension rubidium strontium mixed gas with the optical lattice of two-dimentional 1064nm, then on described one dimension rubidium strontium mixed gas, loads 532nm optical lattice.Because 532nm wavelength is blue off resonance and red off resonance to rubidium atom and strontium atom respectively, the power that they are experienced is respectively repulsive force and attractive force, like this, rubidium atom is ostracised the minimum place of light intensity, strontium atom is then trapped in light intensity maximum, and they are spatially be spaced (with reference to Figure of description 2) that be dislocatedly distributed.Therefore, the present invention only just defines the optical lattice of one-dimensional single-color dislocation in y-direction with the laser of 532nm, and rubidium atom and strontium atom dislocation only have 133nm.In addition, along with the increasing of 532nm optical lattice well depth, described one dimension rubidium strontium combination gas know from experience by two components surpass stream and be phase-changed into and only have rubidium atom to be still in superly to flow phase, strontium atom then changes to Mott insulation phase mutually, continue to increase laser power, described one dimension rubidium strontium mixed gas then enters two Mott insulation phases of dislocation.
Structure of the present invention is simple, processing ease, only need the power of the 532nm laser instrument described in regulating, effectively can control the described phase residing for one dimension rubidium strontium mixed gas, the present invention can be used to study complicated quantum phase transitions, and the multi-components mixed gas overall situation regulate and control with local and the front line science such as quantum magnetic of complexity.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the present invention produces the device of one-dimensional single-color dislocation rubidium strontium optical lattice
Fig. 2 one dimension rubidium strontium mixed gas is in schematic diagram in 532nm optical lattice.Wherein solid (hollow) bead represents rubidium or strontium atom, and solid line (dotted line) represents the gesture that rubidium (strontium) atom is suffered in 532nm optical lattice.
Fig. 3 rubidium atom and the strontium atom tunnelling intensity laser power variation in 532nm optical lattice.Wherein solid line (dotted line) represents rubidium (strontium) atom tunnelling.In figure, Er is photon recoil energy.
In Fig. 4 rubidium atom and the kind of strontium atom in the optical lattice of y direction and Interspecific interaction with laser power variation.Its cathetus (dotted line) represents interaction in rubidium (strontium) atom kind, and dotted line represents rubidium strontium atom Interspecific interaction.In figure, Er is photon recoil energy.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but should not limit transformation range of the present invention with this.
First refer to Fig. 1, Fig. 1 is the schematic diagram that the present invention produces the device of one-dimensional single-color dislocation rubidium strontium optical lattice, as seen from the figure, the present invention produces the device of the optical lattice of one-dimensional single-color dislocation, this device comprises 1064nm laser instrument 1, half-wave plate 2, polarization beam splitter prism 3 and the first catoptron 4, second catoptron 5, the 3rd catoptron 6, the 4th catoptron 7,532nm laser instrument 9, rubidium strontium mixing cold atom cloud the 8, the 5th catoptron 10 and the 6th catoptron 11, and the linking relationship of above-mentioned device is as follows:
Described half-wave plate 2 and polarization beam splitter prism 3 successively in the Laser output direction of described 1064nm laser instrument 1, incident light is divided into folded light beam and transmitted light beam by this polarization beam splitter prism 3, the second catoptron 5, the 3rd catoptron 6, rubidium strontium mixing cold atom cloud 8 and the 4th catoptron 7 successively in described folded light beam direction, the light reflected by the 3rd catoptron 6 forms z direction through rubidium strontium mixing cold atom cloud 8 and the 4th catoptron 7, be rubidium strontium mixing cold atom cloud 8 and the first catoptron 4 successively in described transmitted light beam direction, form x direction;
The 5th described catoptron 10, rubidium strontium mixing cold atom cloud 8 and the 6th catoptron 11 successively in the Laser output direction of described 532nm laser instrument 9, the 5th described catoptron 10 is at 45 ° with the laser direction of described 532nm laser instrument 9, the light reflected by the 5th described catoptron 10 is through the 6th catoptron 11 described in the directive of center of described rubidium strontium mixing cold atom gas 8, after the 6th described catoptron 11 reflects, overlap with input beam at the center of described rubidium strontium mixing cold atom gas 8, form one dimension optical lattice on y direction;
The transmitted light beam of described polarization beam splitter prism 3 passes first catoptron 4 described in the directive of center of described rubidium strontium mixing cold atom gas 8, after the reflection of this first catoptron 4, overlap with input beam at the center of described rubidium strontium mixing cold atom gas 8, form one dimension optical lattice on x direction;
The folded light beam of described polarization beam splitter prism 3 through the second described catoptron 5, the 3rd catoptron 6 through described rubidium strontium mixing cold atom gas 8 center directive described in the 4th catoptron 7, after the 4th catoptron 7 reflects, overlap with input beam at the center of described rubidium strontium mixing cold atom gas 8, form the one dimension optical lattice on z direction;
Rubidium atom and the strontium atom of described rubidium strontium mixing cold atom gas 8 are blue off resonance and red off resonance to the light of 532nm respectively, and rubidium atom and strontium atom are trapped in the minimum place of light intensity and maximum respectively, form the rubidium strontium optical lattice of one-dimensional single-color dislocation.
1, the preparation of one dimension rubidium strontium mixed gas: be divided into two-beam light equal by force through described half-wave plate 2 and described PBS4 with the laser that described 1064nm laser instrument 1 produces, described rubidium strontium mixing cold atom cloud 8 is passed in the x-direction respectively with z direction, and by the first described catoptron 4 and the 4th catoptron 7, Guang Yuan road is returned respectively, form two-dimentional optical lattice.The power of the 1064nm laser instrument 1 described in slow increase, is loaded in two-dimentional optical lattice by described rubidium strontium mixing cold atom cloud 8, forms one dimension rubidium strontium mixed gas.
2, one dimension rubidium strontium dislocation optical lattice: Guang Yuan road in the y-direction through described rubidium strontium mixing cold atom cloud 8, and is returned by described catoptron 11 by the laser produced with described 532nm laser instrument 9, forms the one dimension optical lattice in y direction.Because rubidium atom and strontium atom are blue off resonance and red off resonance to the light of 532nm respectively, therefore rubidium atom and strontium atom are trapped in the minimum place of light intensity and maximum respectively.Form the optical lattice of one-dimensional single-color dislocation.
3, two Mott insulation phase: load in the process of 532nm optical lattice on One-dimensional Quantum gas, when light intensity is less, rubidium atom and strontium atom are all in super stream phase (two component super stream phase), the optical lattice in Slow loading y direction, when reaching certain light intensity, strontium atom changes to Mott insulation phase mutually and rubidium atom is still in super stream phase, be called one-component Mott insulation phase, continue the light intensity increasing optical lattice, rubidium atom also enters Mott insulation phase, is called two Mott insulation phase.Because rubidium atom and strontium atom are dislocatedly distributed, therefore two Mott insulation is also spatially dislocation mutually.
4, transformation temperature light intensity: because rubidium atom and strontium atom spatially stagger, the interaction therefore between rubidium atom and strontium atom is very little, especially when light intensity is stronger.
Fig. 3 gives tunnelling between rubidium atom and strontium atom lattice point, and Fig. 4 gives in rubidium atom and strontium atom kind and Interspecific interaction.From Fig. 4, we can find out that the interphase interaction of rubidium strontium is very little, can ignore.
Therefore, in the present invention, rubidium atom and strontium atom surpass that to flow to Mott phase transformation be separate, are therefore easy to obtain light intensity corresponding to transformation temperature.
Claims (1)
1. produce the device of one-dimensional single-color dislocation rubidium strontium optical lattice, it is characterized in that this device comprises 1064nm laser instrument (1), half-wave plate (2), polarization beam splitter prism (3) and the first catoptron (4), the second catoptron (5), the 3rd catoptron (6), the 4th catoptron (7), 532nm laser instrument (9), rubidium strontium mixing cold atom cloud (8), the 5th catoptron (10) and the 6th catoptron (11), the configuration relation of above-mentioned device is as follows:
Described half-wave plate (2) and polarization beam splitter prism (3) successively in the Laser output direction of described 1064nm laser instrument (1), incident light is divided into folded light beam and transmitted light beam by this polarization beam splitter prism (3), the second catoptron (5) successively in described folded light beam direction, 3rd catoptron (6), rubidium strontium mixing cold atom cloud (8) and the 4th catoptron (7), the light reflected by the 3rd catoptron (6) forms z direction through rubidium strontium mixing cold atom cloud (8) and the 4th catoptron (7), rubidium strontium mixing cold atom cloud (8) and the first catoptron (4) successively in described transmitted light beam direction, form x direction,
The 5th described catoptron (10) successively in the Laser output direction of described 532nm laser instrument (9), rubidium strontium mixing cold atom cloud (8) and the 6th catoptron (11), the 5th described catoptron (10) is at 45 ° with the laser direction of described 532nm laser instrument (9), the light reflected by the 5th described catoptron (10) is through the 6th catoptron (11) described in the directive of center of described rubidium strontium mixing cold atom gas (8), after the 6th described catoptron (11) reflection, overlap with input beam at the center of described rubidium strontium mixing cold atom gas (8), form one dimension optical lattice on y direction,
The transmitted light beam of described polarization beam splitter prism (3) passes first catoptron (4) described in the directive of center of described rubidium strontium mixing cold atom gas (8), after the reflection of this first catoptron (4), overlap with input beam at the center of described rubidium strontium mixing cold atom gas (8), form one dimension optical lattice on x direction;
The folded light beam of described polarization beam splitter prism (3) through described the second catoptron (5), the 3rd catoptron (6) through described rubidium strontium mixing cold atom gas (8) center directive described in the 4th catoptron (7), after the 4th catoptron (7) reflection, overlap with input beam at the center of described rubidium strontium mixing cold atom gas (8), form the one dimension optical lattice on z direction;
The rubidium atom of described rubidium strontium mixing cold atom gas (8) and strontium atom are blue off resonance and red off resonance to the light of 532nm respectively, rubidium atom and strontium atom are trapped in the minimum place of light intensity and the maximum of 532nm respectively, form the rubidium strontium optical lattice of one-dimensional single-color dislocation.
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| CN104297938B (en) * | 2014-09-17 | 2016-08-24 | 中国科学技术大学 | Single complete mutual unbiased base of quantum bit realize device |
| CN110554509B (en) * | 2019-09-09 | 2021-10-01 | 中山大学 | Device and method for forming spin-dependent optical lattice |
| CN113296384B (en) * | 2021-06-10 | 2022-04-08 | 中国科学院国家授时中心 | Dual light-adjustable lattice device for space light clock |
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| CN102007371A (en) * | 2008-03-12 | 2011-04-06 | 国立科学研究中心 | Cold atom interferometry sensor |
| KR101163367B1 (en) * | 2011-02-21 | 2012-07-12 | 광주과학기술원 | Apparatus and method for generating optical lattice |
| CN102879915A (en) * | 2012-10-26 | 2013-01-16 | 中国科学院上海光学精密机械研究所 | High resolution imaging device used for cold atom system |
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| US6151435A (en) * | 1998-11-01 | 2000-11-21 | The United States Of America As Represented By The Secretary Of The Navy | Evanescent atom guiding in metal-coated hollow-core optical fibers |
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