Improvements and New Evaluation of NIM4 Caesium Fountain Clock at NIM in 2005–2006

Li, Tianchu; Li, Mingshou; Lin, Pingwei; Wang, Ping; Chen, Weiliang; Liu, Nianfeng; Lin, Yang‐I

doi:10.1088/0256-307x/24/5/014

Cited by 11 publications

(4 citation statements)

References 3 publications

(2 reference statements)

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“…• Placing several nanocircuits in a microwave cavity would enable one to study a large variety of effects involving interaction between nanocircuits mediated by cavity photons [199][200][201][202][203]. First experiments have already been realized with carbon nanotubes and graphene [54,97,122]. • One could go further in the hybridization of devices by coupling both a quantum dot circuit and a superconducting quantum bit to a microwave cavity [204,205].…”

Section: Discussionmentioning

confidence: 99%

“…On the contrary, they consider devices where the individual spin of electrons would be conserved in the single electron regime. At present, the multiparticle spin-photon coupling of [29,[119][120][121][122][123][124][125] is awaiting an experimental realization.…”

Section: Spin-photon Coupling In Multiple Particle Devices Withmentioning

confidence: 99%

“…Other configurations have been proposed theoretically, which lack experimental realization at present. For instance, it has been suggested to use multiparticle spin states in devices with no spin-orbit coupling [29,[119][120][121][122][123][124][125]. It could also be interesting to use Shiba states which are Andreev states in the presence of a magnetic impurity or strong Coulomb interaction in a quantum dot [130].…”

Section: Comparison Between the Different Systems And Conclusionmentioning

confidence: 99%

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Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena

Cottet¹,

Dartiailh²,

Desjardins³

et al. 2017

J. Phys.: Condens. Matter

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Circuit QED techniques have been instrumental to manipulate and probe with exquisite sensitivity the quantum state of superconducting quantum bits coupled to microwave cavities. Recently, it has become possible to fabricate new devices where the superconducting quantum bits are replaced by hybrid mesoscopic circuits combining nanoconductors and metallic reservoirs. This mesoscopic QED provides a new experimental playground to study the light-matter interaction in electronic circuits. Here, we present the experimental state of the art of Mesoscopic QED and its theoretical description. A first class of experiments focuses on the artificial atom limit, where some quasiparticles are trapped in nanocircuit bound states. In this limit, the Circuit QED techniques can be used to manipulate and probe electronic degrees of freedom such as confined charges, spins, or Andreev pairs. A second class of experiments consists in using cavity photons to reveal the dynamics of electron tunneling between a nanoconductor and fermionic reservoirs. For instance, the Kondo effect, the charge relaxation caused by grounded metallic contacts, and the photo-emission caused by voltage-biased reservoirs have been studied. The tunnel coupling between nanoconductors and fermionic reservoirs also enable one to obtain split Cooper pairs, or Majorana bound states. Cavity photons represent a qualitatively new tool to study these exotic condensed matter states.

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Section: Discussionmentioning

confidence: 99%

Section: Spin-photon Coupling In Multiple Particle Devices Withmentioning

confidence: 99%

Section: Comparison Between the Different Systems And Conclusionmentioning

confidence: 99%

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Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena

Cottet¹,

Dartiailh²,

Desjardins³

et al. 2017

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4] An alternative way is to obtain averaged magnetic field values from Zeeman frequency data for various launching heights of the atoms. [5][6][7][8][9][10][11] Employing the rf excitation method, Jefferts et al measured the field distribution exactly, which was used to verify the Zeeman frequency variation against the atom's apogee height. 2) Szymaniec et al employed an approximate formula to obtain the magnetic field value from the Zeeman frequency records at subsequent launch heights.…”

Section: Introductionmentioning

confidence: 99%

Inverse problem approach to evaluate quadratic Zeeman effect for an atomic fountain frequency standard KRISS-F1

Park¹,

Lee²,

Heo³

et al. 2021

Jpn. J. Appl. Phys.

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The evaluation of the quadratic Zeeman shift in atomic fountain frequency standards requires information on the magnetic field distribution along the drift region. Plotting Zeeman frequencies against various launching heights provides the temporally averaged magnetic field values seen by the flying atoms. Using those data, we were able to deduce a reasonable field map by taking the approach of solving an inverse problem. We employed a regularization method after establishing a linear set of equations. The analysis enabled us to evaluate the quadratic Zeeman shift and its uncertainty against various launching heights. Our method encompasses and generalizes the deconvolution method. This paper covers the mathematical tricks to solve the inverse problem and its application to the atomic fountain frequency standard KRISS-F1.

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The transportable cesium fountain clock NIM5: its construction and performance

Lin

et al. 2009

Front. Phys. China

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The second laser cooling cesium fountain clock NIM5 at the National Institute of Metrology (NIM) China adopts the (1,1,1) direct optical molasses ( OM) configuration. NIM5 has been running with a stability of 3×10 −15 /d and an operation ratio of 99% since 2007. Preliminary evaluations of NIM5 in 2008 showed a typical combined uncertainty of 3×10 −15 . The NIM5 clock is operating in parallel with NIM's first fountain clock NIM4. NIM4 and NIM5 are used to steer the frequency of the calculated NIM atomic time TA-c(NIM) and the first set of results are promising. We are now at the stage of comparing the frequency of NIM5 with UTC to support the independent frequency shift evaluations of NIM5 and contribute to the international atomic time in the near future.

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Improvements and New Evaluation of NIM4 Caesium Fountain Clock at NIM in 2005–2006

Cited by 11 publications

References 3 publications

Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena

Cavity QED with hybrid nanocircuits: from atomic-like physics to condensed matter phenomena

Inverse problem approach to evaluate quadratic Zeeman effect for an atomic fountain frequency standard KRISS-F1

The transportable cesium fountain clock NIM5: its construction and performance

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