Trapping of lithium atoms in a large hollow optical dipole trap

Vinogradov, V. A.; Карпов, К. А.; Lukashov, Sergey; Turlapov, Andrey

doi:10.1070/qel17362

Cited by 8 publications

(1 citation statement)

References 55 publications

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“…Such a distribution follows the concept of two-color dipole optical trapping [3,4]: a red-detuned attracting potential in the core is combined with a blue-detuned repulsing potential at the outer ring. Unlike existing large-scale dipole traps based on axicons or diffractive optics [41,42,[45][46][47], AOTF-based traps allow fast dynamical reconfiguring of the trap potentials and different wavelengths can be processed independently if the frequency ranges corresponding to different wavelengths do not overlap.…”

Section: Multiwavelength Beam Shapingmentioning

confidence: 99%

Acousto-optic k-space filtering for multifrequency laser beam shaping

Yushkov¹,

Kupreychik²,

Obydennov³

et al. 2022

J. Opt.

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One of emerging applications of acousto-optic tunable filters (AOTFs) is spatial filtering of optical beams. A noncollinear AOTF has a tunable ring-shaped transfer function determined by geometry of the refractive index surface in a uniaxial crystal. We rigorously derive the geometrical parameters of the AOTF's elliptic transfer function under noncritical phase matching condition in uniaxial crystals. This basic family of transfer functions can be used for synthesis of axially symmetric transfer functions with the help of multifrequency ultrasonic signals. A two-color tunable optical trap configuration is proposed based on a single AOTF used for laser beam shaping.

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Section: Multiwavelength Beam Shapingmentioning

confidence: 99%

Acousto-optic k-space filtering for multifrequency laser beam shaping

Yushkov¹,

Kupreychik²,

Obydennov³

et al. 2022

J. Opt.

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Loss of atoms from a near-resonance hollow dipole trap

Vinogradov¹,

Карпов²,

Turlapov³

2021

Quantum Electron.

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The lifetime of a gas of 6Li atoms in a large hollow optical dipole trap formed by radiation with a frequency detuned by 4 or 2 GHz upward from resonance is measured. The trap has the shape of a thin-walled cylinder with flat bases and a volume of ∼1 mm3. The main mechanism responsible for the loss of atoms is heating due to Rayleigh scattering. The influence of collisions of atoms with the background gas and with each other on the measured lifetime is negligible.

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Implementation of one-qubit quantum gates with individual addressing of two rubidium atoms in two optical dipole traps

et al. 2021

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We report the results of experiments on implementing individually addressable one-qubit quantum gates on a microwave transition with two 87Rb atoms in two optical dipole traps. Addressing is carried out using additional focused laser light, which results in a differential light shift of the microwave transition frequency. In the absence of addressing in each of the atoms, Rabi oscillations are obtained on the microwave clock transition 5S1/2 (F = 2, mF = 0) → 5S1/2(F = 1, mF = 0) between two working levels of qubits with a frequency of up to 5.1 kHz, a contrast up to 98 %, and a coherence time up to 4 ms. When addressing is turned on, the probability of a microwave transition in the addressed atom is suppressed to an average value of less than 5 %. The Rabi oscillations remaining in the other atom have the same contrast and correspond to the implementation of individually addressable basic one-qubit quantum operations (Hadamard gate and NOT gate) from different initial states of a qubit with an average fidelity of 92% ± 3 %. After renormalising this fidelity to the error in the preparation and measurement of quantum states of qubits, an estimate of 97% ± 3% is obtained for the fidelity of individual qubit rotations.

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Trapping of lithium atoms in a large hollow optical dipole trap

Cited by 8 publications

References 55 publications

Acousto-optic k-space filtering for multifrequency laser beam shaping

Acousto-optic k-space filtering for multifrequency laser beam shaping

Loss of atoms from a near-resonance hollow dipole trap

Implementation of one-qubit quantum gates with individual addressing of two rubidium atoms in two optical dipole traps

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