Generation of polarization-entangled photon pairs in a cold atomic ensemble

Wu, Yuelong; Li, Shujing; Ge, Wei; Xu, Zhen; Liang, Tian; Wang, Hai

doi:10.1007/s11434-015-0985-7

Cited by 11 publications

(6 citation statements)

References 25 publications

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“…During the past decade, a large number of single-particle and multi-particle entanglement states have been successfully generated [20][21][22][23]. In various applications, photons are the best long-range carriers of quantum information, for photons have long decoherence time, and are relatively easy to manipulate.…”

Section: Introductionmentioning

confidence: 99%

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Zhou

Wang

et al. 2017

Front. Phys.

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We propose two efficient entanglement concentration protocols (ECPs) for arbitrary less-entangled single-photon entanglement state, in which the photon qubit has the polarization feature. The first ECP is in linear optics, and the second ECP is in nonlinear optics. The two ECPs have some attractive advantages. First, they can preserve the polarization feature of the photon qubit, while all the other existing ECPs for single photon state cannot achieve this goal. Second, they only require one pair of less-entangled single-photon entanglement state and some auxiliary single photons. Third, they only require local operations. Especially, the second ECP can be used repeatedly, which can increase its success probability largely. Based on above properties, our two ECPs, especially the second one may be useful in current and future quantum communication.

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Section: Introductionmentioning

confidence: 99%

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Zhou

Wang

et al. 2017

Front. Phys.

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“…Another way to realize it is through controlled teleportation, which is actually a "one-to-one"quantum information transmission with the control of agents in a network. Entanglement generation and distribution were studied and developed in [15][16][17], which can be used for the experimental realization of teleportation. To resist quantum attacks [18][19][20] on a public-key encryption protocol, we have come up with two ways to achieve this purpose.…”

Section: Introductionmentioning

confidence: 99%

Qubit-wise teleportation and its application in public-key secret communication

Yang

2016

Sci. China Inf. Sci.

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We propose a quantum public-key encryption (QPKE) protocol for an unknown multi-qubit state based on qubit-wise teleportation. The private-key is a computational Boolean function, whereas the public-key is a pair of a random bit string and a quantum state. A private-key corresponds to an exponential number of public-keys. Security analysis showed that the proposed protocol has information-theoretic security from attacks for the private-key and the encryption. A multi-partite quantum secret state sharing protocol is presented based on the proposed multi-qubit-oriented QPKE protocol. Such secret state sharing protocol is informationtheoretically secure.Keywords public-key encryption, quantum information, quantum teleportation, quantum cryptography, quantum secret sharing CitationWu C M, Yang L. Qubit-wise teleportation and its application in public-key secret communication.

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“…Quantum entanglement is one of inherently physical phenomena that it is considered to be important resource not only in quantum information processing, [1][2][3][4][5][6] e.g., performing communication and computation tasks with an efficiency which is unachievable in classical world, [7,8] but also in setting the transition between classical and quantum world. [9][10][11] As a basic feature of quantum theory, quantum entanglement is a significant resource of quantum network that allows the inseparable quantum correlation to be shared between distant parties.…”

Section: Introductionmentioning

confidence: 99%

Enhancing stationary entanglement between two optomechanical oscillators by Coulomb interaction with Kerr medium*

Yang¹,

Zhu²,

Liu³

et al. 2021

Chinese Phys. B

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We theoretically study the stationary entanglement of two charged nanomechanical oscillators coupling via Coulomb interaction in an optomechanical system with an additional Kerr medium. We show that the degree of entanglementbetween two nanomechanical oscillators is suppressed by Kerr interaction dueto photon blockade and enhanced by Coulomb coupling strength. We also show other parameters for adjusting and obtaining entanglement, such as the driving power and the frequencies of the two oscillators, and the entanglement is robust against temperature. Our study proves a way for adjusting stationary entanglement between two optomechanical oscillators by Coulomb interaction and Kerr medium.

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Generation of polarization-entangled photon pairs in a cold atomic ensemble

Cited by 11 publications

References 25 publications

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Efficient Concentration Protocols for the Single-Photon Entanglement State with Polarization Feature

Qubit-wise teleportation and its application in public-key secret communication

Enhancing stationary entanglement between two optomechanical oscillators by Coulomb interaction with Kerr medium*

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