Carrier thermometry of cold ytterbium atoms in an optical lattice clock

Han, Chengyin; Zhou, Min; Zhang, Xiaohang; Gao, Qi; Xu, Yilin; Li, Shangyan; Zhang, Shuang; Xu, Xiaojun

doi:10.1038/s41598-018-26367-8

Cited by 8 publications

(4 citation statements)

References 40 publications

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“…7) using the same beam used to interrogate the atoms for clock operation. Using a standard technique of taking the ratio of the integrated area under the first red and blue sidebands [52], we obtainn ≈ 0.66 along the direction of the interrogation beam, oriented along one of the tight radial axes of our tweezers. From the sideband separation, we measure a trap frequency of ω ≈ 2π × 24.5 kHz.…”

Section: Sideband Thermometry On the Clock Transitionmentioning

confidence: 96%

An Atomic-Array Optical Clock with Single-Atom Readout

et al. 2019

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Currently, the most accurate and stable clocks use optical interrogation of either a single ion or an ensemble of neutral atoms confined in an optical lattice. Here, we demonstrate a new optical clock system based on an array of individually trapped neutral atoms with single-atom readout, merging many of the benefits of ion and lattice clocks as well as creating a bridge to recently developed techniques in quantum simulation and computing with neutral atoms. We evaluate singlesite resolved frequency shifts and short-term stability via self-comparison. Atom-by-atom feedback control enables direct experimental estimation of laser noise contributions. Results agree well with an ab initio Monte Carlo simulation that incorporates finite temperature, projective read-out, laser noise, and feedback dynamics. Our approach, based on a tweezer array, also suppresses interaction shifts while retaining a short dead time, all in a comparatively simple experimental setup suited for transportable operation. These results establish the foundations for a third optical clock platform and provide a novel starting point for entanglement-enhanced metrology, quantum clock networks, and applications in quantum computing and communication with individual neutral atoms that require optical clock state control.

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Section: Sideband Thermometry On the Clock Transitionmentioning

confidence: 96%

An Atomic-Array Optical Clock with Single-Atom Readout

et al. 2019

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“…equation 15), probing a transition with a large polarizability difference is advantageous and has better accuracy since the effect is exaggerated over other broadening sources (e.g. power broadening) [103]. In figure 7(c) we compare the temperatures extracted using carrier thermometry to the conventional method of taking the ratio of the integrated area under the sidebands and find good agreement.…”

Section: Two-body Ultracold Reactive Collisionsmentioning

confidence: 82%

Ultracold $^{88}\rm{Sr}_2$ molecules in the absolute ground state

Leung,

Tiberi,

Iritani

et al. 2021

Preprint

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We report efficient all-optical creation of an ultracold gas of alkalineearth-metal dimers, 88 Sr 2 , in their absolute ground state. Starting with weakly bound singlet molecules formed by narrow-line photoassociation in an optical lattice, followed by stimulated Raman adiabatic passage (STIRAP) via a singlet-dominant channel in the (1)0 + u excited potential, we prepare pure samples of more than 5500 molecules in X 1 Σ + g (v = 0, J = 0). We observe two-body collisional loss rates close to the universal limit for both the least bound and most bound vibrational states in X 1 Σ + g . We demonstrate the enhancement of STIRAP efficiency in a magic-wavelength optical lattice where thermal decoherence is eliminated. Our results pave the way for the use of alkaline-earth-metal dimers for high-precision spectroscopy, and indicate favorable prospects for robust quantum state preparation of ultracold molecules involving closedshell atoms, as well as molecule assembly in deep optical traps tuned to a magic wavelength.

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“…7) using the same beam used to interrogate the atoms for clock operation. Using a standard technique of taking the ratio of the integrated area under the first red and blue sidebands [53], we obtainn ≈ 0.66 along the direction of the interrogation beam, oriented along one of the tight radial axes of our tweezers. From the sideband separation, we measure a trap frequency of ω ≈ 2π × 24.5 kHz.…”

Section: Sideband Thermometry On the Clock Transitionmentioning

confidence: 96%

“Tweezer Clock” Offers New Possibilities in Timekeeping

Ludlow

2019

Physics

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Currently, the most accurate and stable clocks use optical interrogation of either a single ion or an ensemble of neutral atoms confined in an optical lattice. Here, we demonstrate a new optical clock system based on an array of individually trapped neutral atoms with single-atom readout, merging many of the benefits of ion and lattice clocks as well as creating a bridge to recently developed techniques in quantum simulation and computing with neutral atoms. We evaluate single-site-resolved frequency shifts and shortterm stability via self-comparison. Atom-by-atom feedback control enables direct experimental estimation of laser noise contributions. Results agree well with an ab initio Monte Carlo simulation that incorporates finite temperature, projective readout, laser noise, and feedback dynamics. Our approach, based on a tweezer array, also suppresses interaction shifts while retaining a short dead time, all in a comparatively simple experimental setup suited for transportable operation. These results establish the foundations for a third optical clock platform and provide a novel starting point for entanglement-enhanced metrology, quantum clock networks, and applications in quantum computing and communication with individual neutral atoms that require optical-clock-state control.

show abstract

Carrier thermometry of cold ytterbium atoms in an optical lattice clock

Cited by 8 publications

References 40 publications

An Atomic-Array Optical Clock with Single-Atom Readout

An Atomic-Array Optical Clock with Single-Atom Readout

Ultracold $^{88}\rm{Sr}_2$ molecules in the absolute ground state

“Tweezer Clock” Offers New Possibilities in Timekeeping

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