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公开(公告)号：US12088312B2
公开(公告)日：2024-09-10
申请号：US18029448
申请日：2021-06-07
发明人： Tianyu Xie , Shaoyi Xu , Zhiyuan Zhao , Fazhan Shi , Jiangfeng Du
摘要： A method for implementing an atomic clock based on NV-14N coupling spin system in diamond and a device are provided. The method is to lock a RF frequency using a 14N zero-field splitting and output the RF frequency as a frequency standard. The method includes: applying a pulse sequence to jointly initialize NV electron spins and 14N nuclear spins; performing a Ramsey interferometry to compare a RF frequency and a 14N zero-field splitting; entangling the NV electron spin and the nuclear spin, reading out a state of nuclear spins by collecting a fluorescence signal; calculating a frequency difference between the RF frequency and the 14N zero-field splitting according to the fluorescence signal, thereby locking the RF frequency to the 14N zero-field splitting; and outputting the RF frequency as a frequency standard.
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公开(公告)号：US20240126215A1
公开(公告)日：2024-04-18
申请号：US18277353
申请日：2022-02-10
IPC分类号： G04F5/14
CPC分类号： G04F5/14
摘要： An atomic oven includes a cartridge and a main body. The cartridge includes a holder that accommodates an atom source; and a capillary nozzle. The main body includes: a housing in which the cartridge is installed; a button heater; an access opening for removing the cartridge from the main body and placing the cartridge into the main body, the access opening being provided on the atmosphere side, which is outside the main body; and a passage from the access opening to the housing. The cartridge is inserted into the main body through the access opening and is installed in the housing. The atom source is heated by the button heater, whereby atomic gas generated from the atom source is emitted as an atom beam to the vacuum side, which is outside the main body.
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公开(公告)号：US20240045381A1
公开(公告)日：2024-02-08
申请号：US18491304
申请日：2023-10-20
摘要： In an example, an apparatus comprises a sealed container containing a dipolar gas. The apparatus also comprises a first transmit antenna, a second transmit antenna, and a receive antenna each communicatively coupled to the sealed container. The apparatus also comprises a control circuit including a transceiver, the control circuit having a first transmit output, a second transmit output, and a receive input, the first transmit output coupled to the first transmit antenna, the second transmit output coupled to the second transmit antenna, and the receive input coupled to the receive antenna.
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公开(公告)号：US11894854B2
公开(公告)日：2024-02-06
申请号：US17915776
申请日：2021-03-30
摘要： An optical lattice clock includes a clock transition space having disposed therein an atom group trapped in an optical lattice, and a triaxial magnetic field correction coil for correcting the magnetic field of the clock transition space. Additionally, in a correction space that includes the clock transition space and is larger than the clock transition space, a photoreceiver promotes the clock transition of the atom group trapped in the optical lattice and acquires a clock transition frequency distribution for the correction space. Further, a corrector corrects the magnetic field of the triaxial magnetic field correction coil on the basis of the frequency distribution measured by the photo receiver.
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公开(公告)号：US11868095B2
公开(公告)日：2024-01-09
申请号：US17654888
申请日：2022-03-15
发明人： Mark Saffman , Shimon Kolkowitz , Arjav Sharma
摘要： An atomic clock employs alkali metal atoms such as cesium normally used for microwave atomic clocks but with optical stimulation. While alkali metals provide light emissions having a spectral width being as much as 107 wider (and hence less precise) than alkali earth materials commonly targeted for optical atomic clocks, the present inventors have determined that this disadvantage is significantly reduced by improved signal-to-noise ratio in the obtained signal making practical an atomic clock with improved size, weight, and power consumption.
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公开(公告)号：US20230297033A1
公开(公告)日：2023-09-21
申请号：US17654888
申请日：2022-03-15
发明人： Mark Saffman , Shimon Kolkowitz , Arjav Sharma
摘要： An atomic clock employs alkali metal atoms such as cesium normally used for microwave atomic clocks but with optical stimulation. While alkali metals provide light emissions having a spectral width being as much as 107 wider (and hence less precise) than alkali earth materials commonly targeted for optical atomic clocks, the present inventors have determined that this disadvantage is significantly reduced by improved signal-to-noise ratio in the obtained signal making practical an atomic clock with improved size, weight, and power consumption.
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公开(公告)号：US11750204B2
公开(公告)日：2023-09-05
申请号：US17692742
申请日：2022-03-11
申请人： National Institute of Information and Communications Technology , Tokyo Institute of Technology
发明人： Motoaki Hara , Yuichiro Yano , Masatoshi Kajita , Tetsuya Ido , Hiroyuki Ito
摘要： This atomic resonator for causing a resonance frequency by CPT resonance includes: a gas cell having alkali metal atoms enclosed; a photodetector configured to detect light having passed through the gas cell and convert the light to an electric signal; a high-frequency oscillator configured to receive the electric signal and output the signal after a frequency thereof is divided by two; and a laser light source configured to modulate and introduce, into the gas cell, light based on the signal output from the high-frequency oscillator. The high-frequency oscillator has an injection-locked frequency divider circuit including an acoustic resonator as an oscillation element.
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公开(公告)号：US11733655B2
公开(公告)日：2023-08-22
申请号：US17695986
申请日：2022-03-16
申请人： ColdQuanta, Inc.
发明人： Evan Salim , Judith Olson , Andrew Kortyna , Dina Genkina , Flavio Cruz
CPC分类号： G04F5/145 , G01N21/645 , G04F5/14 , H03L7/26 , G01N2021/6471
摘要： A frequency-modulated spectrometry (FMS) output is used to stabilize an atomic clock by serving as an error signal to regulate the clock's oscillator frequency. Rubidium 87 atoms are localized within a hermetically sealed cell using an optical (e.g., magneto-optical) trap. The oscillator output is modulated by a sinusoidal radio frequency signal and the modulated signal is then frequency doubled to provide a modulated 788 nm probe signal. The probe signal excites the atoms, so they emit 775.8 nm fluorescence. A spectral filter is used to block 788 nm scatter from reaching a photodetector, but also blocks 775.8 nm fluorescence with an angle of incidence larger than 8° relative to a perpendicular to the spectral filter. The localized atoms lie within a conical volume defined by the 8° effective angle of incidence so an FMS output with a high signal-to-noise ratio is obtained.
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9.发明申请公开(公告)号：US20230139149A1
公开(公告)日：2023-05-04
申请号：US17780675
申请日：2020-11-26
发明人： Xinghui LI , Ting DU , Haijun CHEN , Zhongzheng LIU , Shunlu XIAO
摘要： Disclosed are a mold assembly for making alkali metal wax packets, a method for preparing same, and a method for using same. The mold assembly comprises a silicon substrate (10), the silicon substrate (10) comprising a mold isolator (11) at the edge of the silicon substrate (10) and a silicon substrate central portion (18). The upper surface of the silicon substrate central portion (18) is indented to form a plurality of wax packet receiving cavities (12). A cavity isolator (13) locates between adjacent wax packet receiving cavities (12). A release sacrificial layer (15) is formed on the upper surface of the silicon substrate (10), and a paraffin layer (16) is formed on the upper surface of the release sacrificial layer (15) away from the silicon substrate (10). Cavities (121) for containing alkali metal are formed on a side of the paraffin layer (16) away from the release sacrificial layer (15). The mold isolator (11) is provided with corrosion release holes (14). The mold assembly can reliably and controllably achieve batch production of uniform alkali metal wax packet arrays and is completely compatible with MEMS and microelectronic processes, with simple processes that can be easily implemented and high operability. The wax packet mold assembly can be reused, such that wasting of raw materials can be avoided, and the cost of batch production can be effectively reduced.
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公开(公告)号：US20230049490A1
公开(公告)日：2023-02-16
申请号：US17812035
申请日：2022-07-12
申请人： Quantinuum LLC
发明人： Michael Feig , Brian Estey , Christopher Gilbreth
摘要： An atomic object confined in a particular region of an atomic object confinement apparatus is cooled using an S-to-P-to-D EIT cooling operation. A controller associated with the atomic object confinement apparatus controls first and second manipulation sources to respectively provide first and second manipulation signals to the particular region. The first manipulation signal is characterized by a first wavelength corresponding to a transition between an S manifold and a P manifold of a first component of the atomic object and detuned from the S-to-P transition by a first detuning. The second manipulation signal is characterized by a second wavelength corresponding to a transition between the P manifold and a D manifold of the first component and detuned from the P-to-D transition by a second detuning. The first and second detunings selected to establish a dark state associated with a two-photon transition between the S manifold and the D manifold.
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