A Fermi-degenerate three-dimensional optical lattice clock

Campbell, Scott; Hutson, Ross B.; Marti, G. Edward; Goban, Akihisa; Oppong, Nelson Darkwah; McNally, Rees; Sonderhouse, Lindsay; Robinson, John; Zhang, Wei; Bloom, Benjamin; Ye, Jun

doi:10.1126/science.aam5538

Cited by 380 publications

(313 citation statements)

References 62 publications

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“…3(a)]. This constitutes a synchronous comparison of the atoms populating each of the two stretched states, similar to synchronous comparisons used to extract the quantum-limited stability of passive optical lattice clocks in the presence of local oscillator noise [4,5,38].…”

Section: Fig 2(b)mentioning

confidence: 99%

Frequency Measurements of Superradiance from the Strontium Clock Transition

et al. 2018

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We present the first characterization of the spectral properties of superradiant light emitted from the ultranarrow, 1-mHz-linewidth optical clock transition in an ensemble of cold 87 Sr atoms. Such a light source has been proposed as a next-generation active atomic frequency reference, with the potential to enable high-precision optical frequency references to be used outside laboratory environments. By comparing the frequency of our superradiant source to that of a state-of-the-art cavity-stabilized laser and optical lattice clock, we observe a fractional Allan deviation of 6.7ð1Þ × 10 −16 at 1 s of averaging, establish absolute accuracy at the 2-Hz (4 × 10 −15 fractional frequency) level, and demonstrate insensitivity to key environmental perturbations.

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Section: Fig 2(b)mentioning

confidence: 99%

Frequency Measurements of Superradiance from the Strontium Clock Transition

et al. 2018

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“…The 87 Sr 1 S 0 − 3 P 0 clock transition is at ν ¼ 430 THz, and the transition linewidth is Δ A ¼ 1 mHz, yielding T max ¼ 160 s [48]. Current work is experimenting with the loading of 10 4 -10 5 87 Sr atoms from a degenerate Fermi gas into a three-dimensional optical lattice [49] to achieve recordlong coherence times. With improved lattice power and engineering, one may expect a strontium optical lattice clock to operate with ∼10 7 atoms.…”

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confidence: 99%

Gravitational wave detection with optical lattice atomic clocks

et al. 2016

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We propose a space-based gravitational wave (GW) detector consisting of two spatially separated, dragfree satellites sharing ultrastable optical laser light over a single baseline. Each satellite contains an optical lattice atomic clock, which serves as a sensitive, narrowband detector of the local frequency of the shared laser light. A synchronized two-clock comparison between the satellites will be sensitive to the effective Doppler shifts induced by incident GWs at a level competitive with other proposed space-based GW detectors, while providing complementary features. The detected signal is a differential frequency shift of the shared laser light due to the relative velocity of the satellites, and the detection window can be tuned through the control sequence applied to the atoms' internal states. This scheme enables the detection of GWs from continuous, spectrally narrow sources, such as compact binary inspirals, with frequencies ranging from ∼3 mHz-10 Hz without loss of sensitivity, thereby bridging the detection gap between spacebased and terrestrial optical interferometric GW detectors. Our proposed GW detector employs just two satellites, is compatible with integration with an optical interferometric detector, and requires only realistic improvements to existing ground-based clock and laser technologies.

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“…With this kind of laser sources we are now entering the regime where the frequency stability of the interrogation laser is on a par with the quantum projection noise limit of today's most stable optical clocks (e.g. [39,40]). …”

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confidence: 99%