33 results about "Atomic system" patented technology

An atomic magnetometer that simultaneously achieves high sensitivity, simple fabrication and small size. This design is based on a diverging (or converging) beam of light that passes through an alkali atom vapor cell and that contains a distribution of beam propagation vectors. The existence of more than one propagation direction permits longitudinal optical pumping of atomic system and simultaneous detection of the transverse atomic polarization. The design could be implemented with a micro machined alkali vapor cell and light from a single semiconductor laser. A small modification to the cell contents and excitation geometry allows for use as a gyroscope.

A compact vacuum chamber gives electric and optical access to a microchip, which is part of the chamber. The main use of the microchip is to confine, cool and manipulate cold atoms (atom chip). The main new feature is that the microchip forms one wall of a vacuum cell. This makes the chamber compact and lightweight, provides large optical access combined with small overall size, eliminates in-vacuum cabling, and makes the back surface of the chip accessible from the outside (e.g., for cooling and/or additional field-producing elements).

The invention is an all-optical Rb frequency standard method and system. The method: firstly, adjusting the pump laser to the wavelength corresponding to Rb D2 line; then modulating semiconductor laser by radio signal to produce optical component needed to excite coherent resonance, and using two proper side bands to excite Rb 0-0 ultrafine coherent resonant transition; when the frequency of fine crystal oscillator deviates, the atomic system outputs a deviation correcting signal to control VCO, to make the VCO return to original frequency. The system is composed of semiconductor laser diode, Rb atomic physical system, optical signal detecting and amplifying device and high-precision constant temperature VCO, which are linked with one another. It uses Rb atomic coherent resonant transition chart line to identify the frequency, and the frequency locking is higher; needs no mechanical exciting system, avoiding the effect of mechanical system; uses commercial fractional laser diode as excitation source.

The invention relates to an efficient quantum storage apparatus for a continuous variable non-classic light field, and mainly solves the technical problem of low quantum storage efficiency of an existing non-classic light field. According to the technical scheme, the efficient quantum storage apparatus for the continuous variable non-classic light field comprises a light source unit, an atomic system and a compression measurement system, wherein the light source unit is provided with a local oscillation light signal aL output end, a probe light pulse signal aP output end and a control light pulse signal aC output end; the probe light pulse signal aP output end is connected with a first input end of the atomic system; the control light pulse signal aC output end is connected with a second input end of the atomic system; the output end of the atomic system is connected with a first input end of the compression measurement system; the local oscillation light signal aL output end is connected with a second input end of the compression measurement system; and the compression measurement system consists of an optical beam splitter, two balanced zero beat detectors, a power subtractor and a digital storage oscilloscope.

Techniques for reconfiguring spectral features stored in a medium based on a two-state atomic system with transition dipole moment μ includes causing a chirp to pass into the medium. The chirp includes a monochromatic frequency that varies in time by a chirp rate κ over a frequency band B_R during a time interval T_R. The amplitude A_R of the chirp is constant over B_R and equal to

A_R=(hbar/μπ)√{square root over ((κ ln [2/ε]))},

The term hbar is reduced Plank's constant, ln is a natural logarithm function, and π is a ratio of a circumference of a circle to a diameter of the circle. For ε<<1, the atomic-state populations in the two states are inverted. For ε=1, prior atomic-state populations are erased, with final populations equal in the two states, regardless of populations before erasure.

The invention discloses a method for achieving atomic energy level four-wave mixing spatial displacement and division measurement. According to the method, laser pulse signals generated by a laser device are processed, and lasers with wave length being 532 nm are obtained and are divided into two beams which are used as pumping sources of two dye laser devices; a laser beam generated by one dye laser device passes through an optical device to form a light beam k1, a light beam k3 and a light beam k1', wherein the light beam k1' is in the same direction as the light beam k1, and a small included angle is formed between the light beam k1' and the light beam k1; a laser beam generated by the other dye laser device passes through the optical device to form a light beam k2 and a light beam k2', wherein the beam propagation direction of the light beam k2 coincides with that of the light beam k1, and an included angel is formed between the light beam k2' and the light beam k1; The light beams k1, k1', k2, k2' and k3 are converged to a sample pool, and two horizontal polarization four-wave mixing signals kF1 and kF2 are generated; interference experiment graphs of the four-wave mixing signals kF1 and kF2 and a detection signal k3 are measured, and therefore four-wave mixing spatial displacement and division measurement can be conducted. The method for achieving atomic energy level four-wave mixing spatial displacement and division measurement is suitable for four-wave mixing signals of open five-level systems of the types such as a cascade three-level type, a Y-type four-level type and a Y-type three-level type in an atom system.

The invention relates to a continuous variable entanglement distillation device between atomic ensembles, which belongs to the technical field of continuous variable entanglement distillation. The continuous variable entanglement distillation device with good reliability and easy implementation provided by the invention is characterized by comprising a light source unit, first and second optical fiber channels, first and second optical choppers, first and second atomic systems, and a measurement system, wherein the light source unit is connected with input ends of the first and second opticalfiber channels respectively, an output end of the first optical fiber channel is connected with an input end of the first optical chopper, an output end of the second optical fiber channel is connected with an input end of the second optical chopper, an output end of the first optical chopper is connected with a first input end of the first atomic system, an output end of the second optical chopper is connected with a first input end of the second atomic system, the light source unit is connected with second input ends of the first and second atomic systems respectively, an output end of the first atomic system is connected with a first input end of the measurement system, an output end of the second atomic system is connected with a second input end of the measurement system, and the light source unit is connected with third and fourth input ends of the measurement system respectively. The continuous variable entanglement distillation device can be used in the field of quantum information.

The invention relates to the technical field of atomic gyro operation, and particularly discloses a precision magneto-optical alignment system and method for an atomic gyro. The precision magneto-optical alignment system for the atomic gyro comprises a detecting light source, a driving light source, a three-dimensional coil and an atomic gas chamber, wherein the atomic gas chamber is placed in thecenter of the three-dimensional coil; the detecting light source is placed outside the three-dimensional coil at one side of the atomic gas chamber; a photodetector is placed at the other side of thethree-dimensional coil corresponding to the detecting light source, and thus, irradiation of the detecting light source passes through the atomic gas chamber and then can be received by the photodetector; and the driving light source is placed in a direction vertical to the detecting light source, and light generated by the driving light source can pass through the atomic gas chamber. Accordingto the precision magneto-optical alignment system and the method for the atomic gyro, a driving light field and a main magnetic field can be ensured to be constantly in an alignment state, the operation precision of an atomic system inside the atomic gyro is enhanced, and a powerful help is provided for improvement of the atomic gyro precision and various performance indicators.

The invention discloses a method for preparing a spin compression state of a cold atom system, which comprises the following steps: providing a two-component spin system which comprises a two-dimensional potential well which has an energy level structure of which the atomic spin state depends on atomic interaction; applying Raman light to the two-dimensional potential well, so that spin interaction equivalently generated by atomic interaction in the two-dimensional potential well is not zero; recording a spin fluctuation signal from the two-dimensional potential well, and determining a change condition of spin compression from the spin fluctuation signal; and according to the change condition of the spin compression, measuring the spin compression property when the spin compression parameter is minimum so as to generate a spin compression state. The method has the advantages that the method is easy to implement, the limitation of the measurement limit of a quantum system is broken through, a new method is provided for improving the quantum precision measurement precision, and the spin compression state is more stable.

Some variations provide a metal vapor-density control system comprising: a first electrode; a multiphase second electrode that is electrically isolated from the first electrode, wherein the second electrode contains an ion-conducting phase capable of transporting mobile ions and an atom-transporting phase capable of storing and transporting neutral forms of the mobile ions; and an ion-conducting layer interposed between the first electrode and the second electrode, wherein the ion-conducting layer is capable of transporting the mobile ions. The metal vapor-density control system may be contained within a vapor cell, a cold atom system, an atom chip, an atom gyroscope, an atomic clock, a communication system switch or buffer, a single-photon generator or detector, a gas-phase atom sensor, a nonlinear frequency generator, a precision spectroscopy instrument, an accelerometer, a gyroscope, an atom interferometer, a magneto-optical trap, an atomic-cloud imaging apparatus, or an atom dispenser system, for example.

The invention discloses a method and device for computation of a system coupling degree. The method comprises the steps that a system design data document is acquired and analyzed, and a system structure constitution table, a system interface relation constitution table and a system internal information transmission statistical table are established in a designed format according to the system design data document; according to the system structure constitution table and the system interface relation constitution table, atomic systems are selected, interface relations between the atomic systems are determined, and intactness of interface relations inside the system is verified; and according to the system interface relations between the atomic systems and the system internal information transmission statistical table, the coupling degree of the system can be computed. According to the invention, an effective supporting method is provided for measurement and evaluation of correlation intensity between system modules. Hence, analysis of a complexity degree of a complicated information system can be guided.

The embodiment of the invention relates to a preprocessing acceleration method and device, equipment and a storage medium, and the method comprises the steps: reading an atomic system file, and obtaining the atomic information of each atom; processing the atom information of each atom to obtain test reference information corresponding to at least two preset tests; according to the test reference information corresponding to the at least two preset tests, carrying out the at least two preset tests on the atomic system; wherein the at least two preset checks comprise at least two of energy checks, boundary checks, topological structure checks, atomic charge checks and atom type statistics. According to the embodiment of the invention, the preprocessing logic can be rearranged, and the preset inspection of the atomic system is merged, so that the atomic system file can be read once, and compared with the prior art, the number of times of reading the atomic system file can be reduced, the time spent on reading the atomic system file by preprocessing is saved, and preprocessing is accelerated.