Teleportation of quantum resources and quantum Fisher information under Unruh effect

Jafarzadeh, Mahnaz; Jahromi, Hossein Rangani; Amniat-Talab, M.

doi:10.1007/s11128-018-1922-x

Cited by 23 publications

(17 citation statements)

References 59 publications

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“…By combining Eqs. ( 9) and (10), the QFI of parameter φ encoded in the quantum state shown in Eq. ( 24) can be calculated as…”

Section: Improving the Teleportation Of Qfi By Eam And Qmrmentioning

confidence: 99%

“…[8] Realistic quantum systems are always inevitably interacting with the environment, which consequently affects the efficiency of QFI transmission. [9][10][11][12][13][14] This reminds that a key ingredient for an actual and reliable QFI teleportation scheme is that one should be able to deal with the noisy environment. The environmental noises are simply classified into Markovian and non-Markovian types according to the length of environmental correlation time.…”

Section: Introductionmentioning

confidence: 99%

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Improving the teleportation of quantum Fisher information under non-Markovian environment

Zeng

Yao

et al. 2023

Chinese Phys. B

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Quantum teleportation is designed to send an unknown quantum state between two parties. In the perspective of remote quantum metrology, one may be interested in teleporting the information that is encoded by physical parameters synthesized by quantum Fisher information (QFI). However, the teleported QFI is often destroyed by the unavoidable interaction between the system and the environment. Here, we propose two schemes to improve the teleportation of QFI in the non-Markovian environment. One is to control the quantum system through the operations of weak measurement (WM) and corresponding quantum measurement reversal (QMR). The other is to modify the quantum system based on the monitoring result of the environment (i.e., environment-assisted measurement, EAM). It is found that, in the non-Markovian environment, these two schemes can increase the teleportation of QFI. By selecting the appropriate strengths of WM and QMR, the environment noise can be completely eliminated and the initial QFI is perfectly teleported. A comprehensive comparison shows that the second scheme not only has a higher probability of success than the first one, but also has a significant improvement of the teleported QFI.

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“…By combining Eqs. ( 9) and (10), the QFI of parameter φ encoded in the quantum state shown in Eq. ( 24) can be calculated as…”

Section: Improving the Teleportation Of Qfi By Eam And Qmrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving the teleportation of quantum Fisher information under non-Markovian environment

Zeng

Yao

et al. 2023

Chinese Phys. B

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“…Here the two-qubit state exposed to the Unruh noise in the Dirac field and affected by PMs is used as a resource to teleport single- and two-qubit unknown quantum states. Our work also differs from [13], in which the two-qubit state exposed to the Unruh noise in the scalar field has been used as a resource to teleport a two-qubit state.…”

Section: Introductionmentioning

confidence: 95%

Effects of partial measurements on quantum resources and quantum Fisher information of a teleported state in a relativistic scenario

2020

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We address the teleportation of single- and two-qubit quantum states, parametrized by weight θ and phase ϕ parameters, in the presence of the Unruh effect experienced by a mode of a free Dirac field. We investigate the effects of the partial measurement (PM) and partial measurement reversal (PMR) on the quantum resources and quantum Fisher information (QFI) of the teleported states. In particular, we discuss the optimal behaviour of the QFI, quantum coherence (QC) as well as fidelity with respect to the PM and PMR strength and examine the effect of the Unruh noise on optimal estimation. It is found that, in the single-qubit scenario, the PM (PMR) strength at which the optimal estimation of the phase parameter occurs is the same as the PM (PMR) strength with which the teleportation fidelity and the QC of the teleported single-qubit state reaches its maximum value. On the other hand, generalizing the results to two-qubit teleportation, we find that the encoded information in the weight parameter is better protected against the Unruh noise in two-qubit teleportation than in the one-qubit scenario. However, extraction of information encoded in the phase parameter is more efficient in single-qubit teleportation than in the two-qubit version.

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“…By doubling protocol T 0 , Lee and Kim have discussed a protocol to transmit an entangled two-qubit system [4]. Moreover, quantum teleportation is investigated using several channels as, thermal entangled states [5]- [7], the cavity of quantum electrodynamics [8], [9], and the relativistic accelerated frame [10]- [12]. Via the thermal mixed state in XXX Heisenberg chain models, the quantum entanglement teleportation and fidelity are investigated [13].…”

Section: Introductionmentioning

confidence: 99%

Quantum Fisher Information of a Teleported State in Heisenberg XYZ Chain With Magnetic Field and Kaplan–Shekhtman–Entin-Wohlman–Aharony Interaction

et al. 2021

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One of the teleportation versions is applied to convey an entangled two-qubit system via a class of a two-qubit XYZ Heisenberg chain model. At thermal equilibrium, the exact solution of the XYZ model with an external magnetic field and the Kaplan-Shekhtman-Entin-Wohlman-Aharony interaction (KSEWA-interaction) is proposed in X, and Z direction. The teleported quantum Fisher information is studied, where we estimate the weight parameter θ, temperature, and the strength parameter of KSEWAinteraction. It is found that, the strength of the KSEWA-interaction and the magnetic field be of benefit in the case of estimating the weight function. Meanwhile, the temperature decreases the teleported information.

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Teleportation of quantum resources and quantum Fisher information under Unruh effect

Cited by 23 publications

References 59 publications

Improving the teleportation of quantum Fisher information under non-Markovian environment

Improving the teleportation of quantum Fisher information under non-Markovian environment

Effects of partial measurements on quantum resources and quantum Fisher information of a teleported state in a relativistic scenario

Quantum Fisher Information of a Teleported State in Heisenberg XYZ Chain With Magnetic Field and Kaplan–Shekhtman–Entin-Wohlman–Aharony Interaction

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