Transmission spectroscopy of a single atom in the presence of tensor light shifts

Steiner, Matthias; Chin, Yue-Sum; Kurtsiefer, Christian

doi:10.1088/1367-2630/ab0431

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…Our experiment starts with a single 87 Rb atom trapped in a red-detuned far off-resonant dipole trap (FORT) that is loaded from a magneto-optical trap (MOT). This dipole trap is formed by a linearly polarized Gaussian laser beam (wavelength 851 nm) that is tightly focused by a pair of high numerical aperture lenses (NA = 0.75, focal length f = 5.95 mm) to a waist of w 0 = 1.4 µm [11,20]. Part of the atomic fluorescence is collected through the same lenses and coupled into single mode fibers that are connected to avalanche photodetectors (APD).…”

Section: Methodsmentioning

confidence: 99%

“…In comparison to other qubit configurations for neutral atoms, our interface based on the stretched states is more susceptible to noise such as magnetic field fluctuations. In earlier experiments, we have shown that a linearly polarized dipole trap can significantly reduce atomic motioninduced qubit dephasing without impacting the lightatom coupling [11]. One approach to further suppress decoherence is to apply dynamical decoupling (DD) techniques [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Coherence of a dynamically decoupled single neutral atom

Chow,

Ng,

Kurtsiefer

2020

Preprint

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Long qubit coherence and efficient atom-photon coupling are essential for advanced applications in quantum communication. One technique to maintain coherence is dynamical decoupling, where a periodic sequence of refocusing pulses is employed to reduce the interaction of the system with the environment. We experimentally study the implementation of dynamical decoupling on an optically-trapped, spin-polarized 87 Rb atom. We use the two magnetic-sensitive 5S 1/2 Zeeman levels, |F = 2, mF = −2 and |F = 1, mF = −1 as qubit states, motivated by the possibility to couple |F = 2, mF = −2 to 5P 3/2 the excited state |F ′ = 3, m ′ F = −3 via a closed optical transition. With more refocusing pulses in the dynamical decoupling technique, we manage to extend the coherence time from 38(3) µs to more than two milliseconds. We also observe a strong correlation between the motional states of the atom and the qubit coherence after the refocusing, which can be used as a measurement basis to resolve trapping parameters.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coherence of a dynamically decoupled single neutral atom

Chow,

Ng,

Kurtsiefer

2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Coherence of a dynamically decoupled single neutral atom

Chow

Kurtsiefer

2021

J. Opt. Soc. Am. B

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Long qubit coherence and efficient atom–photon coupling are essential for advanced applications in quantum communication. One technique to maintain coherence is dynamical decoupling (DD), where a periodic sequence of refocusing pulses is employed to reduce the interaction of the system with the environment. We experimentally study the implementation of DD on an optically trapped, spin-polarized 87 R b atom. We use the two magnetic-sensitive 5 S 1 / 2 Zeeman levels | F = 2 , m F = − 2 ⟩ and | F = 1 , m F = − 1 ⟩ as qubit states, motivated by the possibility of coupling | F = 2 , m F = − 2 ⟩ to 5 P 3 / 2 the excited state | F ′ = 3 , m F ′ = − 3 ⟩ via a closed optical transition. With more refocusing pulses in the DD technique, we manage to extend the coherence time from 38(3) µs to around 7 ms. We also observe a strong correlation between the motional states of the atom and the qubit coherence after the refocusing, which can be used as a measurement basis to resolve trapping parameters.

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Transmission spectroscopy of a single atom in the presence of tensor light shifts

Cited by 2 publications

References 37 publications

Coherence of a dynamically decoupled single neutral atom

Coherence of a dynamically decoupled single neutral atom

Coherence of a dynamically decoupled single neutral atom

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