Fidelity and information in the quantum teleportation of continuous variables
Physical Review A. Atomic, Molecular, and Optical Physics Volume 62 Issue 6
Page 062304-1-062304-4
published_at 2000-11-09
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| File | |
| Title ( eng ) |
Fidelity and information in the quantum teleportation of continuous variables
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| Creator |
Ide Toshiki
Kobayashi Takayoshi
Furusawa Akira
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| Source Title |
Physical Review A. Atomic, Molecular, and Optical Physics
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| Volume | 62 |
| Issue | 6 |
| Start Page | 062304-1 |
| End Page | 062304-4 |
| Abstract |
Ideally, quantum teleportation should transfer a quantum state without distortion and without providing any information about that state. However, quantum teleportation of continuous electromagnetic-field variables introduces additional noise, limiting the fidelity of the quantum-state transfer. In this article, the operator describing the quantum-state transfer is derived. The transfer operator modifies the probability amplitudes of the quantum state in a shifted photon-number basis by enhancing low photon numbers and suppressing high photon numbers. This modification of the statistical weight corresponds to a measurement of finite resolution performed on the original quantum state. The limited fidelity of quantum teleportation is thus shown to be a direct consequence of the information obtained in the measurement.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2000-11-09 |
| Rights |
Copyright (c) 2000 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1094-1622
[DOI] 10.1103/PhysRevA.62.062304
[NCID] AA10764867
[DOI] http://dx.doi.org/10.1103/PhysRevA.62.062304
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