Transfer of nonclassical features in quantum teleportation via a mixed quantum channel
Open accessAbstract
Quantum teleportation of a continuous-variable state is studied for the quantum channel of a two-mode squeezed vacuum influenced by a thermal environment. Each mode of the squeezed vacuum is assumed to undergo the same thermal influence. It is found that when the mixed two-mode squeezed vacuum for the quantum channel is separable, any nonclassical features, which may be imposed in an original unknown state, cannot be transferred to a receiving station. A two-mode Gaussian state, one of which is a mixed two-mode squeezed vacuum, is separable if and only if a positive well-defined P function can be assigned to it. The fidelity of teleportation is considered in terms of the noise factor given by the imperfect channel. It is found that quantum teleportation may give more noise than direct transmission of a field under the thermal environment, which is due to the fragile nature of quantum entanglement of the quantum channel.
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Equation (49) is Gaussian preserving.
“In addition, note that equation (49) is Gaussian preserving [31], as it is the limit of a linear interaction with an environment and so the total system remains Gaussian, while the partial trace also preserves Gaussianity.”
From Markovian master equations: a critical study (2010) · cites this paper as [31]
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References 30 · Cited by 79
Research works printed but not linked: 2
- [17]Lu-Ming Duan, G. Giedke, J. I. Cirac, and P. Zoller, eprint quant-ph/9908056 (1999). · arXiv
- [21]J. Lee and M. S. Kim, Phys. Rev. Lett. , in print; J. Lee, Ph. D. Thesis, Sogang University (1999).
- Authors
- Lee, J., Kim, M. S., & Jeong, H.
- Affiliations
- Queen's University Belfast (GB)
- Sogang University (KR)
- Venue
- Physical Review A
- Publisher
- American Physical Society (APS)
- Published
- 2000-08-15
- Volume
- 62
- Issue
- 3
- ISSN
- 0556-2791 (ISSN-L)
- 1050-2947
- 1094-1622
- OpenAlex
- W2045199635
- Cited by
- 79
- References
- 30
- Citations by year
- 2026: 1 · 2025: 3 · 2022: 1 · 2020: 3 · 2018: 1 · 2016: 4 · 2015: 1 · 2014: 1 · 2013: 1 · 2012: 2
- FWCI
- 8.74
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review A (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Keywords
- quantum teleportation, continuous-variable quantum states, two-mode squeezed vacuum, thermal environment, separability, P-function, two-mode Gaussian states, quantum entanglement, noise factors
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