Quantum gates in mesoscopic atomic ensembles based on adiabatic passage and Rydberg blockade

Бетеров, И. И.; Saffman, M.; Yakshina, E. A.; Zhukov, V. P.; Tretyakov, D. B.; Энтин, В. М.; Ryabtsev, I. I.; Mansell, C. W.; MacCormick, C.; Bergamini, S.; Федорук, М. П.

doi:10.1103/physreva.88.010303

Cited by 83 publications

(68 citation statements)

References 31 publications

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“…Coherent population transfer from one specific internal state to another in quantum system is of great importance and plays a vital role in quantum computation [1][2][3], quantum simulation [4][5][6], and precision measurement [7,8]. In practical quantum computation, high-fidelity transfer should be achieved in the gate operation.…”

Section: Introductionmentioning

confidence: 99%

Experimental observation of double coherent stimulated Raman adiabatic passages in three-levelΛsystems in a cold atomic ensemble

et al. 2014

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Coherent stimulated Raman adiabatic passages (STIRAP) based on a dark state have many applications in diverse quantum systems. In the case of large single-photon detuning in three-level systems, one of the bright states almost does not involve the excited state and then acts as the dark state. In this paper, we report the experimental observation of STIRAP based on the dark state, as well as b-STIRAP based on the above bright state, with the same transfer efficiency in a three-level cold atomic ensemble. Moreover, both STIRAP and b-STIRAP are found to be immune to the time-varying ac Stark shift. As for a typical example to manipulate a superposition state, we realize an inverse operation on an initial superposition state, which cannot be achieved efficiently for STIRAP based on only the dark state. Our observed double STIRAP thus provides a feasible and robust manner to manipulate quantum states.

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Section: Introductionmentioning

confidence: 99%

Experimental observation of double coherent stimulated Raman adiabatic passages in three-levelΛsystems in a cold atomic ensemble

et al. 2014

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“…In the scheme we propose, the control qubit can be stored either in the ground states of a single atom or in an ensemble of strongly interacting atoms, using techniques that have been recently proposed to prepare and control mesoqubits [22]. For clarity we will refer to the control qubit as a single atom qubit, but an extension of the protocol to a mesoqubit is straightforward.…”

Section: Dqc1 With Atomsmentioning

confidence: 99%

A cold-atoms based processor for deterministic quantum computation with one qubit in intractably large Hilbert spaces

Mansell

Bergamini

2014

New J. Phys.

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We propose the use of Rydberg interactions and ensembles of cold atoms in mixed state for the implementation of a protocol for deterministic quantum computation with one quantum bit that can be readily operated in high dimensional Hilbert spaces. We propose an experimental test for the scalability of the protocol and to study the physics of discord. Furthermore, we explore the possibility of extending to non-trivial unitaries, such as those associated to many-body physics. Finally develop a scheme to add control to cold atom unitaries in order to facilitate their implementation in our proposal.At present, no single feature of the quantum world has been identified as the source of the computational enhancement, efficiency and speed-up of quantum protocols. Whilst entanglement is widely recognized as a key resource in quantum technology [1], an advantage over classical computing could be achieved without it [2] in the presence of non-classical correlations (discord). Experiments using few photonic qubits [3] have shown that some computational tasks can be efficiently solved even with no entanglement. As entanglement is

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“…More recently, a scheme for the implementation of quantum logic gates with atomic ensembles consisting of an arbitrary number of strongly interacting atoms in an adiabatic passage has been proposed [24], which relies on the double sequences of STIRAP and adiabatic rapid passage (ARP) pulses. Although early work on STIRAP dealt with discrete intermediate states, since then the population transfer techniques have been studied for the creation of entangled states [25], quantum state control [26], and qubit rotations [27], as well as for deterministic excitation of Rydberg atoms [28,29].…”

Section: Introductionmentioning

confidence: 99%

Adiabatic Population Transfer Based on a Double Stimulated Raman Adiabatic Passage

Akram

Saif

2014

J Russ Laser Res

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Stimulated Raman adiabatic passage (STIRAP) is an adiabatic population-transfer technique that uses two coherent laser pulses in counter-intuitive order, namely, pump and stoke, to achieve complete transfer between two quantum states. Here, we propose a double STIRAP scheme whereby the electronic levels of a four-level atom are coupled by three laser fields forming two pairs of stoke and pump pulses. We derive the optical Bloch equations through the master equation for studying the population dynamics. We show that manipulating the time between two STIRAP sequences provides the state transfer near unity. In particular, we show that there occurs a certain maximum transfer efficiency that can be achieved in the double STIRAP process.

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Quantum gates in mesoscopic atomic ensembles based on adiabatic passage and Rydberg blockade

Cited by 83 publications

References 31 publications

Experimental observation of double coherent stimulated Raman adiabatic passages in three-levelΛsystems in a cold atomic ensemble

Experimental observation of double coherent stimulated Raman adiabatic passages in three-levelΛsystems in a cold atomic ensemble

A cold-atoms based processor for deterministic quantum computation with one qubit in intractably large Hilbert spaces

Adiabatic Population Transfer Based on a Double Stimulated Raman Adiabatic Passage

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