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Proceedings Paper

Physical implementation of non-physical quantum operations: realization of the universal transpose operation
Author(s): Hyang-Tag Lim; Young-Sik Ra; Yong-Su Kim; Joonwoo Bae; Yoon-Ho Kim
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Paper Abstract

The universal transpose of quantum states is an anti-unitary transformation that is not allowed in quantum theory. In this work, we investigate approximating the universal transpose of quantum states of two-level systems (qubits) using the method known as structural physical approximation. We also report its experimental implementation in linear optics. The scheme is optimal in that the maximal fidelity is attained, and also practical as measurement and preparation of quantum states that are experimentally feasible within current technologies are solely applied.

Paper Details

Date Published: 7 September 2011
PDF: 7 pages
Proc. SPIE 8163, Quantum Communications and Quantum Imaging IX, 816311 (7 September 2011); doi: 10.1117/12.903885
Show Author Affiliations
Hyang-Tag Lim, Pohang Univ. of Science and Technology (Korea, Republic of)
Young-Sik Ra, Pohang Univ. of Science and Technology (Korea, Republic of)
Yong-Su Kim, Pohang Univ. of Science and Technology (Korea, Republic of)
Joonwoo Bae, Korea Institute for Advanced Study (Korea, Republic of)
Yoon-Ho Kim, Pohang Univ. of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 8163:
Quantum Communications and Quantum Imaging IX
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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