Nondestructive Fluorescent State Detection of Single Neutral Atom Qubits

Gibbons, Michael; Hamley, C. D.; Shih, Chung-Yu; Chapman, Michael

doi:10.1103/physrevlett.106.133002

Cited by 59 publications

(52 citation statements)

References 24 publications

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“…Currently, addressing individual atoms in optical lattices is difficult because the separation between neighboring lattice sites is comparable to the best achievable focusing widths of laser beams (both typically being 0.5-0.8 µm), but recent progress suggests that there may be methods for overcoming this difficulty (Bakr et al, 2009(Bakr et al, , 2010Fuhrmanek et al, 2011;Gibbons et al, 2011;Nelson et al, 2007;Sherson et al, 2010;Weitenberg et al, 2011;Würtz et al, 2009).…”

Section: A Atoms and Ionsmentioning

confidence: 99%

Quantum simulation

2014

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Simulating quantum mechanics is known to be a difficult computational problem, especially when dealing with large systems. However, this difficulty may be overcome by using some controllable quantum system to study another less controllable or accessible quantum system, i.e., quantum simulation. Quantum simulation promises to have applications in the study of many problems in, e.g., condensed-matter physics, high-energy physics, atomic physics, quantum chemistry and cosmology. Quantum simulation could be implemented using quantum computers, but also with simpler, analog devices that would require less control, and therefore, would be easier to construct. A number of quantum systems such as neutral atoms, ions, polar molecules, electrons in semiconductors, superconducting circuits, nuclear spins and photons have been proposed as quantum simulators. This review outlines the main theoretical and experimental aspects of quantum simulation and emphasizes some of the challenges and promises of this fast-growing field.

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Section: A Atoms and Ionsmentioning

confidence: 99%

Quantum simulation

2014

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“…8 has been compiled from the region-of-interest binning of the EMCCD counts in state detection image for 1.5×10 4 well-resolved atoms that have been prepared in the bright and dark state, respectively. The optimal threshold for state discrimination T opt is found as the threshold value that minimizes the mean value of the state detection error [7,11,29] …”

Section: B State Detection By Threshold Methodsmentioning

confidence: 99%

“…The associated population of excited states causes optically-trapped atoms to experience a dipole force frequently opposing the confinement action of the optical lattice. In practice, the cooling schemes are not limited by this effect and it is commonly assumed that the anti-confining potentials are not relevant for the motional dynamics of the atoms during near-resonant illumination [7]. In consequence, their heating contribution has not received adequate theoretical attention [15] since the early days of laser cooling [16,17] and only recently it has been considered to improve Raman cooling in an optical lattice [18].…”

Section: Heating Dynamics Of Optically Trapped Atoms Under Near-mentioning

confidence: 99%

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State-dependent fluorescence of neutral atoms in optical potentials

Martinez-Dorantes¹,

Alt²,

Gállego³

et al. 2018

Phys. Rev. A

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Recently we have demonstrated scalable, non-destructive, and high-fidelity detection of the internal state of 87 Rb neutral atoms in optical dipole traps using state-dependent fluorescence imaging [M. Martinez-Dorantes et al., PRL, 2017]. In this article we provide experimental procedures and interpretations to overcome the detrimental effects of heating-induced trap losses and state leakage. We present models for the dynamics of optically trapped atoms during state-dependent fluorescence imaging and verify our results by comparing Monte Carlo simulations with experimental data. Our systematic study of dipole force fluctuations heating in optical traps during near-resonant illumination shows that off-resonant light is preferable for state detection in tightly confining optical potentials.

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“…As the other Bell states are off resonant and energetically inaccessible, the double occupancy never occurs for such states. A further florescent picture of the system, which can be done without disturbing the internal states [27], will determine the number of atoms in the first site and reveals if the two atoms are in a singlet state or not. A backward adiabatic evolution (i.e.…”

Section: Application For Optical Latticesmentioning

confidence: 99%

Measurement-induced dynamics for spin-chain quantum communication and its application for optical lattices

2014

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We present a protocol for quantum state transfer and remote state preparation across spin chains which operate in their anti-ferromagnetic mode. The proposed mechanism harnesses the inherent entanglement of the ground state of the strongly correlated many-body systems which naturally exists for free. The uniform Hamiltonian of the system does not need any engineering and, during the whole process, remains intact while a single qubit measurement followed by a single-qubit rotation are employed for both encoding and inducing dynamics in the system. This, in fact, has been inspired by recent progress in observing spin waves in optical lattice experiments, in which manipulation of the Hamiltonian is hard and instead local rotations and measurements have become viable. The attainable average fidelity stays above the classical threshold for chains up to length 50 and the system shows very good robustness against various sources of imperfection.

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Nondestructive Fluorescent State Detection of Single Neutral Atom Qubits

Cited by 59 publications

References 24 publications

Quantum simulation

Quantum simulation

State-dependent fluorescence of neutral atoms in optical potentials

Measurement-induced dynamics for spin-chain quantum communication and its application for optical lattices

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