A note on entanglement swapping of atomic states through the photonic Faraday rotation

Bastos, W. P.; Cardoso, Wesley B.; Avelar, A. T.; Baseia, B.

doi:10.1007/s11128-010-0204-z

Cited by 14 publications

(15 citation statements)

References 45 publications

(72 reference statements)

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“…In the second case the process is due to an appropriate type of interaction between the subsystems. This second scenario may also include the study of exchange of states between the subsystems [4,5,6,7]. In both scenarios the efficiency of the process deserves special attention, whose verification involves the calculation of the fidelity and the success probability of the operation.…”

Section: Introductionmentioning

confidence: 99%

Perfect transfer of quantum states in a network of harmonic oscillators

Portes¹,

Rodrigues²,

Duarte

et al. 2013

Eur. Phys. J. D

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Abstract. This work presents an exactly soluble scheme to address the problem of optimal transfer of quantum states through a set of s harmonic oscillators composing a network with connected ends as a closed quantum circuit. For this purpose we start from a general quadratic Hamiltonian form. The relationship between the parameters of the Hamiltonian, the network size, and the time interval required for such transfer are explicitly shown. Particular physical realizations of this Hamiltonian, transfer of entangled states, including transfer of states at the expense of a quantum entanglement, are also considered.

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Section: Introductionmentioning

confidence: 99%

Perfect transfer of quantum states in a network of harmonic oscillators

Portes¹,

Rodrigues²,

Duarte

et al. 2013

Eur. Phys. J. D

Self Cite

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“…Many protocols, to achieve a secret sharing of quantum information, have been proposed in terms of cavity QED via entanglement swapping or teleportation [16,20,21]. Here, based on C-NOT three-qubit gates approach, we propose to develop and optimize the teleportation protocol used in [16] which is based on faraday rotation approach.…”

Section: Cavity Qed Teleportation Scheme!!!mentioning

confidence: 99%

C-NOT three-gates performance by coherent cavity field and its optimized quantum applications

Rfifi

Baz

2014

Quantum Inf Process

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A new realization model of controlled-not (C-NOT) three gates operations, between two atoms and coherent light. The proposed interaction model allows to earn more interaction time compared with the C-NOT two gates model of the reference work. As investigation of the obtained results, we enhance and optimize a recent teleportation work via coherent cavity field, by using less cavities number during the teleportation process. A higher probability have seen in the coherent state teleportation compared with the reference teleportation protocol (single photon teleportation). Furthermore, a generation and teleportation scheme of multipartite GHZ-type entangled coherent states is established. We note that more efficiency is given to our scheme because of simplicity of homodyne detection for coherent light.

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“…The transitions between two ground states and the excited state |e are assisted with left-circularly (L) and right-circularly (R) polarized photon. The Hamiltonian of this system is written as [40,41]…”

Section: Basic Theoretical Model Of Phonic Faraday Rotationmentioning

confidence: 99%

“…It is so called the Faraday rotation. Based on the Faraday rotation, the protocols for entanglement generation [37], quantum logic gates [38], quantum teleportation [39], controlled teleportation [40], entanglement swapping [41] and entanglement concentration for atoms were proposed [42].Inspired by above works with Faraday rotation [36][37][38][39][40][41][42], we discuss the EPP for entangled atomic systems. The information of the entangled states are encoded in lambda configured three-level atoms trapped inside coupled cavities *…”

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confidence: 99%

Atomic entanglement purification using photonic Faraday rotation

Sheng

Zhao

Liu

et al. 2013

Quantum Inf Process

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We describe an entanglement purification protocol (EPP) for atomic entangled pair using photonic Faraday rotation. It is shown that after the two single photons input-output process in cavity QED, the high quality entangled atomic state can be obtained from the low quality mixed entangled atomic states. Different from other EPPs, the two pairs of mixed states do not need to intact directly. As the photonic Faraday rotation works on the low-Q cavities, this EPP is useful in both quantum communication and computation.PACS numbers: 03.67. Bg, 42.50.Dv I. INTRODUCTIONEntanglement is the important resource in current quantum information processing [1]. For example, quantum teleportaton [2,3], quantum dense coding [4], quantum key distribution [5], quantum state sharing [6][7][8], and quantum direct secure communication [9][10][11], they all require the maximally entangled state to set up the quantum channel. However, the entanglement will inevitably interact with the environment and it will degrade during the process of distribution and storage in the solid system. Entanglement purification is a powerful way for distilling the high quality mixed entangled states in a small ensemble from the low quality mixed states in a large ensembles. In the early works of entanglement purification, they usually used the CNOT gates or similar logic gates, such as the entanglement purification protocol (EPP) proposed by Bennett et. al. [12], the improved EPP proposed by Deustch et. al. [13], the EPP for multipartite entangled systems [14], and so on [15]. In long-distance quantum communication, the photons as the flying qubits are the good candidate for carrying quantum information. So there are many EPPs based on the photons. For example, In 2001, Pan et al. proposed the EPP with the linear optics [16]. In 2003, they realized their protocol in experiment [17]. In 2002, Simon and Pan proposed an EPP using spatial entanglement [18]. In 2008, EPP based on the cross-Kerr nonlinearity was proposed [19]. There are also other EPPs for photonic systems [20-24]. Actually, the flying qubits distribute the entangled states between distance locations, and they should be stored into the solid memory systems for the further application. So there are other EPPs for such solid systems [25-31]. In 2005, Cao et al. proposed an EPP for arbitrary unknown ionic states via linear optics [25]. In the same year, Feng et. al. proposed an EPP with charge detection [26]. In 2006, Reichle et. al. reported their experimental report for purification of two-atom entanglement [27]. In 2011, Wang et al. proposed an EPP for hybrid entangled state using quantum-dot and microcavity coupled system [28].On the other hand, over the pase decades, cavity quantum electrodynamics (QED) has become an important platform for understanding the basic principle of quantum mechanics and quantum information processing [32]. Some excellent experiments, such as the coupling of the trapped atoms with cavity [33], generation of single photons [34], conditional logic gate [35] have b...

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A note on entanglement swapping of atomic states through the photonic Faraday rotation

Cited by 14 publications

References 45 publications

Perfect transfer of quantum states in a network of harmonic oscillators

Perfect transfer of quantum states in a network of harmonic oscillators

C-NOT three-gates performance by coherent cavity field and its optimized quantum applications

Atomic entanglement purification using photonic Faraday rotation

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