Measurement of the lifetimes of the 
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Toh, George; Chalus, Nathan; Burgess, Andrew; Damitz, Amy; Imany, Poolad; Leaird, Daniel E.; Weiner, Andrew M.; Tanner, Carol E.; Elliott, Daniel S.

doi:10.1103/physreva.100.052507

Cited by 10 publications

(6 citation statements)

References 42 publications

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“…4(b), the signal slope increases sharply around 1.68 MHz. The natural linewidth of the cesium 6S 1/2 -7P 1/2 transition is Γ nat = 6.053 (7) MHz [44], and the linewidth of the MTS signal corresponding to the 6S 1/2 (F=4) -7P 1/2 (F'=3) hyperfine transition is measured to be Γ eff = 8.63 MHz from the data plot, using the hyperfine splitting between 7P 1/2 (F'=3) and 7P 1/2 (F'=4) as a reference. This increase in the measured linewidth from the natural linewidth can mostly be attributed to saturation broadening [33].…”

Section: A Optimization Of the Mts Setupmentioning

confidence: 99%

“…Comparing (a) and (b), we find the F=4 -F'=3 hyperfine transition has the largest MTS signal strength, and choose it as the reference transition. The natural linewidth of the 133 Cs 6S 1/2 -7P 1/2 transition is 6.053(7) MHz[44]. The linewidth of the MTS signal corresponding to the F=4 -F'=3 hyperfine transition is measured to be 8.63 MHz from the data plot, using the hyperfine splitting (here we use the approximate value of 377.4 MHz[38]) between F'=3 and F'=4 as a reference.…”

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confidence: 99%

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Compact 459 nm Cs cell optical frequency standard with $2.1\times{10}^{-13}/\sqrtτ$ short-term stability

Miao,

Shi,

Zhang

et al. 2022

Preprint

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We achieve a compact optical frequency standard with an extended cavity diode laser locked to the 459 nm 6S 1/2 -7P 1/2 transition of thermal 133 Cs atoms in a φ 10 mm × 50 mm glass cell, using modulation transfer spectroscopy (MTS). The self-estimated frequency stability of this laser is 1.4 × 10 −14 / √ τ . With heterodyne measurement, we verify the linewidth-narrowing effect of MTS locking and measure the frequency stability of the locked laser. The linewidth of each laser is reduced from the free-running 69.6 kHz to 10.3 kHz after MTS stabilization, by a factor of 6.75. The Allan deviation measured via beat detection is 2.1 × 10 −13 / √ τ for each MTS-stabilized laser. In addition, we measure the hyperfine structure of the 7P 1/2 energy level based on the heterodyne measurements, and calculate the magnetic dipole constant A of the Cs 7P 1/2 level to be 94.38(6) MHz, which agrees well with previous measurements. This compact optical frequency standard can also be used in other applications that require high-stability lasers, such as laser interferometry, laser cooling, geodesy, and so on.

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Section: A Optimization Of the Mts Setupmentioning

confidence: 99%

mentioning

confidence: 99%

Compact 459 nm Cs cell optical frequency standard with $2.1\times{10}^{-13}/\sqrtτ$ short-term stability

Miao,

Shi,

Zhang

et al. 2022

Preprint

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show abstract

“…The decay rates of excited quantum states are important parameters for characterizing the electronic structure of atomic and molecular systems. Precise decay rate measurements are necessary for atomic studies of electroweak symmetries [1][2][3], calibration of astrophysical measurements [4,5], prediction of optical trap depths and magic wavelengths [6,7], fluorescence measurements of the number of magneto-optically trapped atoms or molecules [8,9], calibrating atom-based sensors [10], and more.…”

Section: Introductionmentioning

confidence: 99%

“…The isotope shifts are measured by laser induced fluorescence to roughly 0.5 % uncertainty, while the decay rates are measured using time-correlated single photon counting (TCSPC) with roughly 1 % total uncertainty. TCSPC techniques have previously been used to measured the decay rates of several atoms [2,3,11,12] and molecules [13] to 1 % uncertainty or better.…”

Section: Introductionmentioning

confidence: 99%

Laser Spectroscopy of the y$^7$P$_J^{\circ}$ states of Cr I

Norrgard,

Barker,

Eckel

et al. 2021

Preprint

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Here we report measured and calculated values of decay rates of the 3d 4 ( 5 D)4s4pstates of Cr I. The decay rates are measured using time-correlated single photon counting with roughly 1 % total uncertainty. In addition, the isotope shifts for these transitions are measured by laser induced fluorescence to roughly 0.5 % uncertainty. The decay rate calculations are carried out by a hybrid approach that combines configuration interaction and the linearized coupled cluster method (CI+all-order method). The measurements provide a much needed precision benchmark for testing the accuracy of the CI+all-order approach for such complicated systems with six valence electrons, allowing to significantly expand its applicability. These measurements also demonstrate operation of a cryogenic buffer gas beam source for future experiments with MgF molecules toward quantum blackbody thermometry.

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“…The time interval of a Gaussian pulse Ω s (t) = Ω s exp(−t 2 /σ 2 ) must be long enough 1-to fulfill the adiabaticity condition and preserve the dark state σ g −1 ; 2-to ensure the photon emission considering the cavity decay-time σ Γ −1 ; and 3-to perform the population rotation σ Ω −1 eff . Considering the spontaneous emission of the intermediate γ p /2π = 1MHz [50] and the Rydberg state γ r /2π = 4.5kHz [51], the operation fidelity of…”

mentioning

confidence: 99%

Photonic interface for long-distance entanglement of logical-qubits

Khazali¹

2022

Preprint

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A scalable fault-tolerant quantum-computer hardware with current noisy intermediate-scale quantum (NISQ) devices requires the juxtaposition of different types of quantum systems. In this sense, long-distance entanglement of stationary error-corrected logical qubits requires a photonic bus facilitating inter/intra-connection among the cores of quantum processors, the units of quantum memories, and the worldwide quantum internet. This article proposes a photonic interface for 4 and 6-qubit encoding of surface-code logical-qubits in an atomic-lattice platform. Accommodating the lattice inside a cavity, the gate emits photonic-qubits that are entangled by the logical-qubits. The entangling mechanism is provided by the Fermi scattering of a Rydberg electron from the plaquette atoms trapped in a qubit-dependent lattice. Therefore, different arrangements of logical-qubits derive the central atom over distinguished eigen-states, featuring photon emission at the early or late times distinguished by quantum interference. Finally, entanglement swapping of two emitted photons would make the far separated plaquettes entangled in the logical basis.

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Measurement of the lifetimes of the 7p 2P3/2 and 7p

Cited by 10 publications

References 42 publications

Compact 459 nm Cs cell optical frequency standard with $2.1\times{10}^{-13}/\sqrtτ$ short-term stability

Compact 459 nm Cs cell optical frequency standard with $2.1\times{10}^{-13}/\sqrtτ$ short-term stability

Laser Spectroscopy of the y$^7$P$_J^{\circ}$ states of Cr I

Photonic interface for long-distance entanglement of logical-qubits

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