Quantum hyperentanglement and its applications in quantum information processing

Deng, Fu‐Guo; Ren, Bao‐Cang; Li, Xi-Han

doi:10.1016/j.scib.2016.11.007

Cited by 238 publications

(101 citation statements)

References 159 publications

(369 reference statements)

Supporting

Mentioning

101

Contrasting

Order By: Relevance

“…Multipartite entanglement, compared to two-particle entanglement, is more powerful to reveal the nonlocality of quantum physics [1,[28][29][30]. The Greenberger-Horne-Zeilinger (GHZ) states enable more refined demonstrations of quantum nonlocality, and can be used to build more complex quantum networks involving many nodes [31][32][33][34] and to perform, i.e., conferencekey agreement [35].…”

Section: Introductionmentioning

confidence: 99%

Resource-efficient analyzer of Bell and Greenberger-Horne-Zeilinger states of multiphoton systems

Miranowicz

Xia

et al. 2019

Phys. Rev. A

View full text Add to dashboard Cite

We propose a resource-efficient error-rejecting entangled-state analyzer for polarization-encoded multiphoton systems. Our analyzer is based on two single-photon quantum-nondemolition detectors, where each of them is implemented with a four-level emitter (e.g., a quantum dot) coupled to a onedimensional system (such as a micropillar cavity or a photonic nanocrystal waveguide). The analyzer works in a passive way and can completely distinguish 2 n Greenberger-Horne-Zeilinger (GHZ) states of n photons without using any active operation or fast switching. The efficiency and fidelity of the GHZ-state analysis can, in principle, be close to unity, when an ideal single-photon scattering condition is fulfilled. For a nonideal scattering, which typically reduces the fidelity of a GHZstate analysis, we introduce a passively error-rejecting circuit to enable a near-perfect fidelity at the expense of a slight decrease of its efficiency. Furthermore, the protocol can be directly used to perform a two-photon Bell-state analysis. This passive, resource-efficient, and error-rejecting protocol can, therefore, be useful for practical quantum networks.

show abstract

Section: Introductionmentioning

confidence: 99%

Resource-efficient analyzer of Bell and Greenberger-Horne-Zeilinger states of multiphoton systems

Miranowicz

Xia

et al. 2019

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…Hence, our protocol is feasible under the current technologies and it can be implemented in realistic devices. Certainly, in a practical application of this QKA protocol with a noisy environment, some useful methods should be exploited to depress the influence of noise, such as decoherence-free subspace [59,60,61,62], self-error-rejecting transmission [63,64,65,66], error correction with ancillary qubits [67], entanglement purification [68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83], and entanglement concentration [84,85,86,87,88,89,90,91,92].…”

Section: Discussion and Summarymentioning

confidence: 99%

High-Efficiency Three-Party Quantum Key Agreement Protocol with Quantum Dense Coding and Bell States

Wang

Zhang

et al. 2019

Int J Theor Phys

Self Cite

View full text Add to dashboard Cite

We propose a high-efficiency three-party quantum key agreement protocol, by utilizing two-photon polarization-entangled Bell states and a few single-photon polarization states as the information carriers, and we use the quantum dense coding method to improve its efficiency. In this protocol, each participant performs one of four unitary operations to encode their sub-secret key on the passing photons which contain two parts, the first quantum qubits of Bell states and a small number of single-photon states. At the end of this protocol, based on very little information announced by other, all participants involved can deduce the same final shared key simultaneously. We analyze the security and the efficiency of this protocol, showing that it has a high efficiency and can resist both outside attacks and inside attacks. As a consequence, our protocol is a secure and efficient three-party quantum key agreement protocol.Quantum communication provides an unconditionally secure way for the transmission of information, by exploiting the principles in quantum mechanics. In recent decades, this field gains much attention of researchers all over the world. There are many important branches of quantum communication for different tasks, such as quantum key distribution (QKD) [1,2,3], quantum secure direct communication (QSDC) [4,5,6,7,8,9,10,11,12], quantum secret sharing (QSS) [13], and so on. QKD supplies a secure way for two remote legitimate parties to create a private key [1,2,3]. The parties in QKD can detect the eavesdropper, say Eve, if she monitors their quantum channel, by picking up a subset of their outcomes obtained with two nonorthogonal measuring bases to check eavesdropping. They can then discard the outcomes when they find Eve. Far different from QKD, QSDC gives an absolutely secure approach for two parties to transmit their secret message directly, without producing the private key in advance. The first QSDC scheme was proposed by Long and Liu [4] and it exploits the properties of Bell states and uses a block transmission technique in 2002. Subsequently, Deng, Long, and Liu [5] clarified the standard criterion for QSDC explicitly in 2003, and they proposed an important two-step QSDC protocol by using the Einstein-Podolsky-Rosen photon pair blocks . Recently, these two-step QSDC protocols [4,5] were experimentally implemented by two groups [6,7]. In 2004, Deng and Long [8] introduced the first QSDC protocol based on a sequence of single photons, called quantum one-time pad scheme which has been recently experimentally demonstrated by Hu et al. [9] in a noisy environment with frequency coding. In 2017, Wu et al. [10] proposed a high-capacity QSDC protocol with two-photon six-qubit hyperentangled states. QSS is used to share a secret key among some agents of a boss [13], in which the agents can reconstruct the secret if and only if they collaborate. QSS has a higher requirement than QKD because a potentially dishonest agent may injure the benefit of the boss. The inside attacks will increase largely the diffic...

show abstract

“…In order to further improve the quantum channel capacity, beat the limit of linear photonic superdense coding [19], we can also encode the quantum information in more than one degrees of freedom. Hyperentanglement [20][21][22][23][24][25][26][27], which means particles are simultaneously entangled in multiple degrees of freedom (DOFs), becomes a key resource in high-capacity quantum communication [28][29][30][31][32][33][34][35][36][37][38]. Currently, the preparation of hyperentangled states in different DOFs, such as polarization-momentum DOFs [22], polarization-orbital- * email: zhangmei@bnu.edu.cn angular momentum DOFs [23], and multipath DOFs [24], are already available.…”

Section: Introductionmentioning

confidence: 99%

Error-heralded generation and self-assisted complete analysis of two-photon hyperentangled Bell states through single-sided quantum-dot-cavity systems

Liang

Mei

2019

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

Hyperentangled Bell-state analysis (HBSA) is critical for high-capacity quantum communication. Based on a recent proposal by Wang et al. [Opt. Express 24 28444-28458 (2016)]. We design two separate schemes for error-heralded deterministic generation and self-assisted complete HBSA of two-photon entangled in both polarization and spatial-mode degrees of freedom. Different from previous programs, we firstly proposed an error-heralded block with a singly charged quantum dot inside a single-sided optical microcavity, with which errors due to imperfect interactions between photons and quantum dot systems can be heralded. Thanks to the error-heralded block, the fidelity of the two schemes for hyperentangled Bell-state generation and complete HBSA can reach unit one. Besides, hyperentanglement makes it possible to analyze the polarization state assisted by the measured spatial-mode state. The self-assisted way of the HBSA greatly simplifies the analysis process and largely relaxes the requirements on nonlinearities. Therefore, the schemes hold the promise to implement more easily in experiments, taking a step closer to the long-distance high-capacity quantum communication.

show abstract

Quantum hyperentanglement and its applications in quantum information processing

Cited by 238 publications

References 159 publications

Resource-efficient analyzer of Bell and Greenberger-Horne-Zeilinger states of multiphoton systems

Resource-efficient analyzer of Bell and Greenberger-Horne-Zeilinger states of multiphoton systems

High-Efficiency Three-Party Quantum Key Agreement Protocol with Quantum Dense Coding and Bell States

Error-heralded generation and self-assisted complete analysis of two-photon hyperentangled Bell states through single-sided quantum-dot-cavity systems

Contact Info

Product

Resources

About