Generation of W state and GHZ state of multiple atomic ensembles via a single atom in a nonresonant cavity

Zhang, Chunyu; Li, Wen-Zhang; Chen, Meifeng

doi:10.1016/j.optcom.2013.09.047

Cited by 12 publications

(8 citation statements)

References 36 publications

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“…23 and in the x-direction are written in Eqs. 24. 13 (b) we find that there is a mirror symmetry for two-point correlations in the z-direction for CP-UL and NUL-NUL pairs.…”

Section: Two-point Quantum Correlation Functions After a Lops Time Evmentioning

confidence: 75%

“…The entanglement of a W state is not fragile in the sense of particle loss, i. e., by tracing out one qubit, the state of remaining N-1 qubits can be again a maximally entangled state [19]. There are some theoretical schemes and practical experiments for generating quantum W states in the different approaches [19,20,21,22,23,24,25]. On the other hand, there have been several proposals for exploiting W states in the quantum information processing [26,27,28,29,30,31].…”

Section: Introductionmentioning

confidence: 99%

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Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure

Motamedifar¹

2017

Physica A: Statistical Mechanics and its Applications

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We consider the three-ligand spin-star structure through homogeneous Heisenberg interactions (XXX-3LSSS) in the framework of dynamical pairwise entanglement. It is shown that the time evolution of the central qubit "one-particle" state (COPS) results in the generation of quantum W states at periodical time instants. On the contrary, W states cannot be generated from the time evolution of a ligand "one-particle" state (LOPS). We also investigate the dynamical behavior of two-point quantum correlations as well as the expectation values of the different spin-components for each element in the XXX-3LSSS. It is found that when a W state is generated, the same value of concurrence among all qubits arises from xx and yy two-point quantum correlations. On the opposite, zz quantum correlation between any two qubits vanishes at these time instants.

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“…23 and in the x-direction are written in Eqs. 24. 13 (b) we find that there is a mirror symmetry for two-point correlations in the z-direction for CP-UL and NUL-NUL pairs.…”

Section: Two-point Quantum Correlation Functions After a Lops Time Evmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure

Motamedifar¹

2017

Physica A: Statistical Mechanics and its Applications

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“…Then, she guides the coherent light from c B to c A and let it interact with atoms 3 and 4, by using the performed C-NOT three-qubit gates (17)- (24). This leads the whole system of the four atoms and the coherent light to the following state :…”

Section: Teleportation Of An Entangled Atomic Statementioning

confidence: 99%

“…Generation and teleportation of n-qubit GHZ-type entangled coherent statesSeveral sechmes have been proposed to prepare entangled coherent states, as a previous Greenberger-Horne-Zeilinger (GHZ) states[24][25][26] schemes.…”

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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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“…Due to their high level of entanglement, the GHZ states are of importance in various applications such as metrology [11], quantum teleportation [15], quantum computing [16] and quantum secret sharing [17]. There are numerous proposed schemes for producing GHZ-states particularly in the context of cavity quantum electrodynamics [18][19][20][21][22][23]. Some of the most successful implementations have been in trapped-ion systems, where 14-ion GHZ states [24] and more complex entangled states of up to 20 ions [25] have been observed.…”

Section: Introductionmentioning

confidence: 99%

Generating GHZ states with squeezing and post-selection

Alexander,

Uys,

Bollinger

2019

Preprint

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Many quantum state preparation methods rely on a combination of dissipative quantum state initialization, followed by unitary evolution to a desired target state. Here we demonstrate the usefulness of quantum measurement as an additional tool for quantum state preparation. Starting from a pure separable multipartite state, a control sequence, which includes rotation, spin squeezing via one-axis twisting, quantum measurement and post-selection, generates a highly entangled multipartite state, which we refer to as Projected Squeezed states (or P S states). Through an optimization method, we then identify parameters required to maximize the overlap fidelity of the P S states with the maximally entangled Greenberger-Horne-Zeilinger states (or GHZ states). The method leads to an appreciable decrease in state preparation time of GHZ states when compared to preparation through unitary evolution with one-axis twisting only.

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Generation of W state and GHZ state of multiple atomic ensembles via a single atom in a nonresonant cavity

Cited by 12 publications

References 36 publications

Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure

Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure

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

Generating GHZ states with squeezing and post-selection

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