Aligning reference frames with quantum states
Bagán Capella, Emili (Universitat Autònoma de Barcelona. Departament de Física)
Baig i Aleu, Marià, 1955-
(Universitat Autònoma de Barcelona. Departament de Física)
Muñoz Tapia, Ramon (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society
Date: |
2001 |
Abstract: |
We analyze the problem of sending, in a single transmission, the information required to specify an orthogonal trihedron or reference frame through a quantum channel made out of N elementary spins. We analytically obtain the optimal strategy, i. e. , the best encoding state and the best measurement. For large N, we show that the average error goes to zero linearly in 1/N. Finally, we discuss the construction of finite optimal measurements. |
Rights: |
Tots els drets reservats. |
Language: |
Anglès |
Document: |
Article ; Versió publicada |
Subject: |
Matèries del catàleg ;
Paraules clau fora catàleg |
Published in: |
Physical review letters, Vol. 87, Issue 25 (November 2001) , p. 257903, ISSN 1079-7114 |
DOI: 10.1103/PhysRevLett.87.257903
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Record created 2014-01-22, last modified 2022-04-27