Hybrid entanglement concentration assisted with single coherent state

Guo, Rui; Zhou, Lan; Gu, Shi‐Pu; Wang, Xingfu; Sheng, Yu‐Bo

doi:10.1088/1674-1056/25/3/030302

Cited by 9 publications

(4 citation statements)

References 82 publications

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“…Subsequently, Mitali et al [52] designed two ECPs for Cluster-type ECS based on linear optics. Independently, the hybrid ECPs have also attracted the recent interest of the researchers [53,54]. However, yet no ECP has been designed specifically for GHZ-type ECS.…”

Section: Introductionmentioning

confidence: 99%

Entanglement Concentration Protocols for GHZ-type Entangled Coherent State Based on Linear Optics

Sisodia

Shukla

2021

Int J Theor Phys

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We proposed two entanglement concentration protocols (ECPs) to obtain maximally entangled Greenberger-Horne-Zeilinger (GHZ)-type entangled coherent state (ECS) from the corresponding partially entangled GHZ-type ECSs. We obtained the first ECP using a partially entangled GHZ-type ECS assisted with a superposition of single-mode coherent state, however the second ECP is designed using two copies of partially entangled GHZ-type ECSs. The success probabilities have also been calculated and discussed for both the ECPs. We have further compared the success probabilities of our first ECP for 3-mode GHZ-type ECS with an ECP of 3-mode W-type ECS and found that our ECP is more efficient (maximal success probabilities) for larger value (β = 0.7) of state parameter. For the physical realization, two optical circuits (for two ECPs) using linear optical elements, viz 50:50 beam splitter, phase shifter, and photon detectors are provided, which support the future experimental implementation possible with the present technology.

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Section: Introductionmentioning

confidence: 99%

Entanglement Concentration Protocols for GHZ-type Entangled Coherent State Based on Linear Optics

Sisodia

Shukla

2021

Int J Theor Phys

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“…[22][23][24][25][26][27][28][29][30][31][32] Recently, another kind of entanglement, called hybrid entanglement, has also been used in quantum information processing. [33][34][35][36][37][38][39][40][41][42][43][44][45] The hybrid entanglement means that the entanglement is generated between different degrees of freedom of a particle pair. A typical hybrid entanglement is the microscopic-macroscopic hybrid entanglement, which is useful for loophole-free Bell-type inequality tests.…”

Section: Introductionmentioning

confidence: 99%

Direct measurement of the concurrence of hybrid entangled state based on parity check measurements

et al. 2019

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The hybrid entangled state is widely discussed in quantum information processing. In this paper, we propose the first protocol to directly measure the concurrence of the hybrid entangled state. To complete the measurement, we design parity check measurements (PCMs) for both the single polarization qubit and the coherent state. In this protocol, we perform three rounds of PCMs. The results show that we can convert the concurrence into the success probability of picking up the correct states from the initial entangled states. This protocol only uses polarization beam splitters, beam splitters, and weak cross-Kerr nonlinearities, which is feasible for future experiments. This protocol may be useful in future quantum information processing.

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“…For example, CV QKD [57,60,61] analogue of DV QKD [3]. Subsequently, an ECP has been reported for 4-qubit Cluster-type hyperentangled states (HES), which is a hyperentangled state between polarization states and coherent state of qubit [62]. In practical applications of ECS, the maximally ECSs are usually the necessary resources.…”

Section: Introductionmentioning

confidence: 99%

Linear optics-based entanglement concentration protocols for cluster-type entangled coherent state

Sisodia

Shukla

Long

2019

Quantum Inf Process

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We proposed two linear optics based entanglement concentration protocols (ECPs) to obtain maximally entangled 4-mode Cluster-type entangled coherent state (ECS) from less (partially) entangled Cluster-type ECS. The first ECP is designed using a superposition of single-mode coherent state with two unknown parameters, whereas the second ECP is obtained using a superposition of single-mode coherent state and a superposition of two-mode coherent state with four unknown parameters. The success probabilities have been calculated for both the ECPs. Necessary quantum circuits enabling future experimental realizations of the proposed ECPs are provided using linear optical elements. Further, the benefit of the proposed schemes is established in the context of long distance quantum communication where photon loss is an obstruction.

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Hybrid entanglement concentration assisted with single coherent state

Cited by 9 publications

References 82 publications

Entanglement Concentration Protocols for GHZ-type Entangled Coherent State Based on Linear Optics

Entanglement Concentration Protocols for GHZ-type Entangled Coherent State Based on Linear Optics

Direct measurement of the concurrence of hybrid entangled state based on parity check measurements

Linear optics-based entanglement concentration protocols for cluster-type entangled coherent state

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