Quantum teleportation of particles in an environment*

Lu, Yang; Liu, Yuchen; Li, Yansong

doi:10.1088/1674-1056/ab84de

Cited by 30 publications

(19 citation statements)

References 40 publications

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“…Entanglement is one of the significant non-local features of quantum systems that distinguish them from their classical counterparts [10]. It has received great attention in recent years as a key resource for quantum information processing and communication [11], quantum cryptography [12], dense coding [13], teleportation [14], and the exponential acceleration of certain computing tasks [15,16,17]. Furthermore, maximally entangled states are typically used for complete and efficient quantum information execution [18,19].…”

Section: Introductionmentioning

confidence: 99%

Probing multipartite entanglement, coherence and quantum information preservation under classical Ornstein-Uhlenbeck noise

Rahman,

Javed,

Ullah

et al. 2021

Preprint

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We address entanglement, coherence, and information protection in a system of four non-interacting qubits coupled with different classical environments, namely: common, bipartite, tripartite, and independent environments described by Ornstein-Uhlenbeck (ORU) noise. We show that quantum information preserved by the four qubit state is more dependent on the coherence than the entanglement using time-dependent entanglement witness, purity, and Shannon entropy. We find these two quantum phenomena directly interrelated and highly vulnerable in environments with ORU noise, resulting in the pure exponential decay of a considerable amount. The current Markovian dynamical map, as well as suppression of the fluctuating character of the environments are observed to be entirely attributable to the Gaussian nature of the noise. Furthermore, the increasing number of environments are witnessed to accelerate the amount of decay. Unlike other noises, the current noise parameter's flexible range is readily exploitable, ensuring long enough preserved memory properties. The four-qubit GHZ state, besides having a large information storage potential, stands partially entangled and coherent in common environments for an indefinite duration. Thus, it appeared to be a more promising resource for functional quantum computing than bipartite and tripartite quantum systems. In addition, we derive computational values for each system-environment interaction, which will help quantum practitioners to optimize the related kind of classical environments.

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Section: Introductionmentioning

confidence: 99%

Probing multipartite entanglement, coherence and quantum information preservation under classical Ornstein-Uhlenbeck noise

Rahman,

Javed,

Ullah

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Long et al introduced a way for overcoming synthesizer phase noise in quantum sensing 85 . Yang et al proposed an extended form of quantum teleportation, quantum tele‐transformation, which treats the single‐particle teleportation and quantum entanglement swapping in the same formalism 86 . The performance of quantum channel is investigated by Sun 87 and Chai 88 via backlog, delay and throughput.…”

Section: Discussionmentioning

confidence: 99%

Effect of noise on remote preparation of an arbitrary single‐qubit state

Zhou

2021

Quantum Engineering

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The effect of noise on the transmission of quantum state has attached much interest recently. Here we investigate the effect of different types of quantum noise on deterministic exact remote preparation of an arbitrary single‐qubit state. Four types of noise which usually encountered in application of quantum remote state preparation, including bit‐flipping, phase‐flipping, depolarizing and amplitude damping, are considered. The average fidelities of remote state preparation for any combinations of noise are calculated. It is shown that more fidelity can be achieved via less entanglement in single‐qubit remote preparation when part or all of the entangled qubits are subjected to amplitude damping noise. It is shown that in several situations more noise may leading to more fidelity in remote state preparation. Moreover, we discuss the effect of noise on probabilistic remote state preparation.

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“…Here only two EPR states |ψ − and |ψ + are used. The reason for using these two Bell-basis states is that they can be measured with the aid of linear optics [87], [88], which is more easily implemented than a complete four-Bell-state measurement, since the latter requires nonlinear optics [89]. The procedure of two-step DQKD is depicted in Fig.…”

Section: A Single-photon-memory Qsdc Protocol Based On Epr Pairsmentioning

confidence: 99%

Single-Photon-Memory Two-Step Quantum Secure Direct Communication Relying on Einstein-Podolsky-Rosen Pairs

Pan

Ruan

et al. 2020

IEEE Access

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Quantum secure direct communication (QSDC) is an important branch of quantum communication that is capable of directly transmitting secret messages over a quantum channel. It may be viewed as a concrete realization of Wyner's wiretap channel theory, which ensures the reliable and secure communication of information in the presence of noise and eavesdropping. Hence it is a fully-fledged quantum-communications protocol, which does not require a separate secret key negotiation phase. By contrast, its quantum key distribution (QKD) counterpart represents a secret key-negotiation protocol, which has to be followed up by a separate classical communication session. The essential difference between these two modes of quantum communication lies in the employment of a block-based data transmission technique, proposed by Long and Liu in 2000. However, the original block-based data transmission requires quantum memory, which is not widely available at the time of writing. Recently, this difficulty has been overcome by using classical coding theory, which has been successfully applied to the single-qubit DL04 QSDC. Here we will present a single-photon-memory QSDC protocol based on entangled pairs of photons. We commence by comparing QSDC to QKD, followed by an example of the single-photon QSDC and single-photon QKD protocol. Then we continue by modifying the so-called two-step QSDC protocol designed for deterministic QKD by reducing the number of qubits in a block into a single one, in which Alice prepares Einstein-Podolsky-Rosen (EPR) photon pairs and partitions them into two parts: the so-called pioneer qubit and the follow-up qubit. The pioneer photon is transferred first to Bob, while the follow-up photon is used either for performing encoding or for eavesdropping detection. Bob extracts the candidate key by combining the two particles of the EPR pair to perform Bell-basis measurement. Then the protocol is transformed into a singlephoton-memory QSDC using coding theory. Our theoretical analysis shows that the resultant protocol is robust to individual attacks. Additionally, a high communication efficiency is achieved. INDEX TERMS Quantum secure direct communication, quantum key distribution, entanglement.

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Quantum teleportation of particles in an environment*

Cited by 30 publications

References 40 publications

Probing multipartite entanglement, coherence and quantum information preservation under classical Ornstein-Uhlenbeck noise

Probing multipartite entanglement, coherence and quantum information preservation under classical Ornstein-Uhlenbeck noise

Effect of noise on remote preparation of an arbitrary single‐qubit state

Single-Photon-Memory Two-Step Quantum Secure Direct Communication Relying on Einstein-Podolsky-Rosen Pairs

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