2019/02/28 by M. Jafarzadeh, Hossein Rangani Jahromi, H. Rangani Jahromi +1 · 12 citations
Computer Science · Physics and Astronomy · #No-teleportation theorem #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum entanglement #Quantum mechanics #Quantum optics and atomic interactions #Quantum teleportation #Qubit #Superdense coding #Teleportation #Unruh effect #quant-ph
paper · pdf · doi:10.1098/rspa.2020.0378
published in Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences 476(2239), 20200378 (Royal Society)
arxiv created 2020/05/11 · openalex publication_date 2020/07/01 · arxiv updated 2020/08/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.