Analyzing the Rydberg-based optical-metastable-ground architecture for 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Yb</mml:mi><mml:mprescripts /><mml:none /><mml:mn>171</mml:mn></mml:mmultiscripts></mml:math>
 nuclear spins

Chen, Neville; Li, Lintao; Huie, William; Ming, Zhao; Vetter, Ian; Greene, Chris H.; Covey, Jacob P.

doi:10.1103/physreva.105.052438

Cited by 22 publications

(7 citation statements)

References 72 publications

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“…ẋ(t) = v(t), v(t) = F (t)/m with F (t) = mω 2 x(t), with random initial position x(0) and velocity v(0) sampled from a Maxwell-Boltzmann distribution, which is an approximation to the full quantum mechanical problem. Calculations are performed assuming realistic experimental parameters for 171 Yb atoms, including a qubit transition wavelength of 578 nm (standing wave period 289 nm), trap frequency of ω/2π = 100 kHz (trap period τ = 10 µs) and a temperature of 5 µK based on current experiments [20,14,21,22]. The average infidelity of each gate, for different gate times T , was obtained by averaging the infidelity 1 − F obtained from the unitary evolution over 2000 classical trajectories.…”

Section: Otw-1 Osw-1 Osw-bb1mentioning

confidence: 99%

Robust phase-controlled gates for scalable atomic quantum processors using optical standing waves

Whitlock

2023

Quantum

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A simple scheme is presented for realizing robust optically controlled quantum gates for scalable atomic quantum processors by driving the qubits with optical standing waves. Atoms localized close to the antinodes of the standing wave can realize phase-controlled quantum operations that are potentially more than an order of magnitude less sensitive to the local optical phase and atomic motion than corresponding travelling wave configurations. The scheme is compatible with robust optimal control techniques and spatial qubit addressing in atomic arrays to realize phase controlled operations without the need for tight focusing and precise positioning of the control lasers. This will be particularly beneficial for quantum gates involving Doppler sensitive optical frequency transitions and provides an all optical route to scaling up atomic quantum processors.

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Section: Otw-1 Osw-1 Osw-bb1mentioning

confidence: 99%

Robust phase-controlled gates for scalable atomic quantum processors using optical standing waves

Whitlock

2023

Quantum

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“…We follow Ref. [27] and use polarization intensity impurity χ for this discussion, where χ = 0 denotes perfect polarization. We discuss the laser polarization impurity of the three sets of laser fields discussed in Sec.…”

Section: B Influence From Laser Polarization Impuritymentioning

confidence: 99%

“…Numerical simulations with feasible parameters show that nuclear spin coherence can be preserved with a fidelity over 0.999. This theory brings opportunities for coherent control of nuclear-spin quantum memories [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Coherence-preserving cooling of nuclear-spin qubits in a weak magnetic field

Shi¹

2023

Phys. Rev. A

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Nuclear spin memories of divalent neutral atoms can allow spin-preserving resolved-sideband cooling in a strong magnetic field [Phys. Rev. Lett. 99, 123001 (2007)]. We present a theory for cooling 87 Sr nuclear-spin qubits in a weak magnetic field. The theory depends on laser excitation of 5s5p 1 P1 to a nearby state which results in mJ -dependent AC Stark shifts large compared to the hyperfine interaction. This effectively suppresses the nuclear-spin mixing due to the hyperfine interaction. Sideband cooling via the clock state quenched by the AC Stark-shifted 1 P1 state leads to nuclear-spin-preserving spontaneous emission back to the ground state. More than being compatible with low magnetic fields, the theory is applicable when the nuclear spin qubits are defined by the two lowest Zeeman substates.

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“…Here we show local control of optical transitions in a tweezer-array clock [17][18][19] by using rearrangement techniques [20][21][22][23][24][25] on atoms in superposition states to precisely control the position-dependent phase imprinted by light-matter interaction. The scheme 26,27 is experimentally simple and highly robust as it solely relies on the relative stability of the tweezer positions and does not Article https://doi.org/10.1038/s41567-023-02323-w rotation with the same laser as before; the shifted atom now rotates back to |0〉 because of the movement-induced phase shift, whereas the unmoved atom completes its rotation to |1〉.…”

mentioning

confidence: 99%

“…The main principle behind this scheme is a locally controlled change of the relative phase between the atomic dipole oscillation and the phase of the laser while the atom is in a superposition state; in essence, our scheme realizes a locally controlled Ramsey sequence with global driving (Methods). Similar techniques have been used in the context of ion-trap experiments with two ions 26 , but not in a scalable fashion, as is possible with tweezer arrays 27 .…”

mentioning

confidence: 99%

Multi-ensemble metrology by programming local rotations with atom movements

Shaw,

Finkelstein,

Tsai

et al. 2024

Nat. Phys.

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Current optical atomic clocks do not utilize their resources optimally. In particular, an exponential gain in sensitivity could be achieved if multiple atomic ensembles were to be controlled or read out individually, even without entanglement. However, controlling optical transitions locally remains an outstanding challenge for neutral-atom-based clocks and quantum computing platforms. Here we show arbitrary, single-site addressing for an optical transition via sub-wavelength controlled moves of atoms trapped in tweezers. The scheme is highly robust as it relies only on the relative position changes of tweezers and requires no additional addressing beams. Using this technique, we implement single-shot, dual-quadrature readout of Ramsey interferometry using two atomic ensembles simultaneously, and show an enhancement of the usable interrogation time at a given phase-slip error probability. Finally, we program a sequence that performs local dynamical decoupling during Ramsey evolution to evolve three ensembles with variable phase sensitivities, a key ingredient of optimal clock interrogation. Our results demonstrate the potential of fully programmable quantum optical clocks even without entanglement and could be combined with metrologically useful entangled states in the future.

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Analyzing the Rydberg-based optical-metastable-ground architecture for Yb171 nuclear spins

Cited by 22 publications

References 72 publications

Robust phase-controlled gates for scalable atomic quantum processors using optical standing waves

Robust phase-controlled gates for scalable atomic quantum processors using optical standing waves

Coherence-preserving cooling of nuclear-spin qubits in a weak magnetic field

Multi-ensemble metrology by programming local rotations with atom movements

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