Quantum remote control: remotely and conclusively changing the overlap between two qubit states. (September 2015)

• Record Type: Journal Article
• Authors: Chen, Libing; Lu, Hong
• Is Part Of: Physica scripta. Volume 90:Number 9(2015:Sep.)
• Page Start: 4249
• Publication Date: 2015-09
• Subjects: Physics -- Periodicals; 530.05
• DOI: 10.1088/0031-8949/90/9/095102
• Languages: English
• ISSNs: 0031-8949

Abstract

<abstract> <title>Abstract</title> <p>We propose a scheme for Alice to change remotely and conclusively the overlap between Bob's two nonorthogonal qubit states with a finite probability of success. The remote nonunitary evolution of Bob's primary system could be generated by performing a proper nonlocal unitary transformation on Bob's primary system and Alice's auxiliary system, followed by a local von Neumann projective measurement on Alice's ancilla. The various desired inner product modifications between Bob's primary states can be efficiently and fully controlled by Alice's auxiliary states. We build a quantum network for implementing rapidly the remote nonunitary transformation, and thus provide a feasible physical means to realize the remote and controllable inner product modification. This scheme is feasible for current experimental technology.</p> </abstract>