Experimental implementation of the universal transpose operation using the structural physical approximation
- Experimental implementation of the universal transpose operation using the structural physical approximation
- 임향택; 라영식; 김용수; 배준우; 김윤호
- Issue Date
- Physical review. A
- VOL 83, NO 2-020301(R)-4
- The universal transpose of quantum states is an antiunitary 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 the structural physical approximation to positive maps. 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.
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