Dissipative preparation of distributed steady entanglement: an approach of unilateral qubit driving

Jin, Zhao; Su, Shi‐Lei; Zhu, Ai‐Dong; Wang, Hong-Fu; Zhang, Shou

doi:10.1364/oe.25.000088

Cited by 10 publications

(11 citation statements)

References 60 publications

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“…The preparation and control of entangled states via dissipative engineering have attracted great interest in the last several years [1,2]. Different from the unitary evolution based schemes, these schemes use decoherence as a powerful resource in the state preparation process without destroying the quantum entanglement.…”

Section: Introductionmentioning

confidence: 99%

Selective Engineering for Preparing Entangled Steady States in Cavity QED Setup

Sousa

Roversi

2019

Quantum Reports

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We propose a dissipative scheme to prepare maximally entangled steady states in cavity QED setup, consisting of two two-level atoms interacting with the two counter-propagating whispering-gallery modes (WGMs) of a microtoroidal resonator. Using spontaneous emission and cavity decay as the dissipative quantum dynamical source, we show that the steady state of this system can be steered into a two-atom single state as well as into a two-mode single state. We probed the compound system with weak field coupled to the system via a tapered fiber waveguide, finding it is possible to determine whether the two atoms or two modes are driven to a maximally entangled state. Through the transmission and reflection measurements, without disturbing the atomic state, when the cavity modes are being driven, or without disturbing the cavity field state, when a single atom being driven, one can get the information about the maximal entanglement. We also investigated for both subsystem, two-atom and two-mode states, the entanglement generation and under what conditions one can transfer entanglement from one subsystem to the other. Our scheme can be selectively used to prepare both maximally entangled atomic state as well as maximally entangled cavity-modes state, providing an efficient method for quantum information processing.

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Section: Introductionmentioning

confidence: 99%

Selective Engineering for Preparing Entangled Steady States in Cavity QED Setup

Sousa

Roversi

2019

Quantum Reports

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“…Quantum entanglement is not only one of the significant features of quantum mechanics but also an important application in quantum information processing (QIP) . Over the past decades, many works have been proposed to create entanglements using atoms or photons assisted by various quantum systems, such as cavity quantum electrodynamics (cavity‐QED), circuit quantum electrodynamics (circuit‐QED), trapped ions, quantum dots, cold atoms, nitrogen‐vacancy (NV) centers, nuclear magnetic resonance, acoustic wave resonators (AWRs), optomechanical systems, and atomic ensembles in free space …”

Section: Introductionmentioning

confidence: 99%

“…Quantum entanglement is not only one of the significant features of quantum mechanics but also an important application in quantum information processing (QIP) [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Over the past decades, many works have been proposed to creat entanglements using atoms or photons assisted by various quantum systems [15,16], such as cavity quantum electrodynamics (cavity-QED) [17][18][19][20][21][22][23], circuit quantum electrodynamics (circuit-QED) [24][25][26][27][28][29][30][31][32][33][34][35],trapped ions [36][37][38][39], quantum dots [40][41][42][43][44][45], cold atoms [46,47], nitrogen-vacancy (NV) centers…”

Section: Introductionmentioning

confidence: 99%

NOON State Generation with Phonons in Acoustic Wave Resonators Assisted by a Nitrogen‐Vacancy‐Center Ensemble

Hua

Yan

2018

Annalen der Physik

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Since the quality factor of an acoustic wave resonator (AWR) reached 10 11 , AWRs have been regarded as a good carrier of quantum information. In this paper, a scheme to construct a NOON state with two AWRs assisted by a nitrogen-vacancy-center ensemble (NVE) is proposed. The two AWRs cross each other vertically, and the NVE is located at the center of the crossing. By considering the decoherence of the system and using resonant interactions between the AWRs and the NVE, and the single-qubit operation of the NVE, a NOON state can be achieved with a fidelity higher than 98.8% when the number of phonons in the AWR is N ≤ 3.

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“…Fortunately, the utility value of dissipation has been discovered recently, which represents a dramatic breakthrough on quantum computation. Different schemes were put forward to prepare the entangled states by dissipation [36][37][38][39][40][41][42][43][44][45][46][47][48][49], e.g. Kastoryano et al suggested a dissipative scheme to create entangled states of two atoms in an optical cavity, which is more effective than the schemes based on unitary dynamics [38].…”

Section: Introductionmentioning

confidence: 99%

“…Shen et al generalized the ideas of Kastoryano's and generate distant steady-state entanglement of two atoms trapped in separate cavities directly coupled to each other [39] or connected by a dissipative bosonic medium [41]. Jin et al utilized the combined effect of the unitary dynamics and dissipative process to prepare a distributed steady-state entanglement [47]. Nevertheless, there remains some potential problems in the previous schemes, for example, either the qubit need to be driven by fields with well-chosen frequencies or the spontaneous emission may decrease the fidelity of the target state.…”

Section: Introductionmentioning

confidence: 99%

Noise-induced distributed entanglement in atom-cavity-fiber system

Li¹,

Shao²,

Wu³

2017

Opt. Express

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The distributed quantum computation plays an important role in large-scale quantum information processing. In the atom-cavity-fiber system, we put forward two efficient proposals to prepare the steady entanglement of two distant atoms with dissipation. The atomic spontaneous emission and the loss of fiber are exploited actively as powerful resources, while the effect of cavity decay is inhibited by quantum Zeno dynamics and quantumjump-based feedback control. These proposals do not require precisely tailored Rabi frequencies or coupling strength between cavity and fiber. Furthermore, we discuss the feasibility of extending the present schemes into the systems consisting of two atoms at the opposite ends of the n cavities connected by (n − 1) fibers, and the corresponding numerical simulation reveals that a high fidelity remains achievable with current experimental parameters. FIG. 1: (a) Diagrammatic illustration of the cavity-atom-fiber system and the atomic level for preparation of the Bell stateThe effective transitions of the reduced system.[51, 52], a more general process, the quantum Zeno dynamics was raised, where the system can evolve away from its initial state under a multidimensional projection [53][54][55][56]. The quantum Zeno dynamics provides us with the possibility to significantly restrain the cavity decay in QIP tasks [57][58][59][60][61][62][63][64][65]. On the other hand, the quantum feedback is usually applied in decoherence suppression, entanglement production, and entanglement protection [66][67][68][69][70][71][72][73][74]. This technology is based on immediately feeding back the measurement results to the quantum system of interest and then alter its subsequent dynamics. For instance, Mancini et al. controlled steady state Einstein-Podolsky-Rosen correlations for two bosonic modes interacting via parametric Hamiltonian by the quantum feedback [69]. Carvalho et al.proposed a direct feedback based on quantum-jump detection to achieve the maximal entangled states between two atoms in a cavity [70], and then they found that the quantum-jump-based feedback can protect highly entangled states against decoherence by comparing the effects of different control Hamiltonians and detection processes [71].In this paper, we propose two dissipative schemes to generate distant entangled Bell state and Knill-Laflamme-Milburn (KLM) state of two atoms with high fidelity, respectively, where two Λ atoms are trapped in two separated cavities connected by a fiber. We eliminate the unconcerned states by dispersive microwave fields, and inhibit the cavity decay by the quantum Zeno dynamics and the quantum-jump-based feedback control. The schemes have four distinctive features: (i) The target state is independent of the concrete initial states. (ii) The schemes are robust against the loss of photon, and the spontaneous emission of atoms and the decay of fibers are powerful resources to create target states. (iii) The atoms in different cavities are more convenient to be manipulated, and needn't precisely tailored...

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Dissipative preparation of distributed steady entanglement: an approach of unilateral qubit driving

Cited by 10 publications

References 60 publications

Selective Engineering for Preparing Entangled Steady States in Cavity QED Setup

Selective Engineering for Preparing Entangled Steady States in Cavity QED Setup

NOON State Generation with Phonons in Acoustic Wave Resonators Assisted by a Nitrogen‐Vacancy‐Center Ensemble

Noise-induced distributed entanglement in atom-cavity-fiber system

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