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Author Yu, Li ♦ Griffiths, Robert B. ♦ Cohen, Scott M.
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2010-01-29
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics
Subject Keyword Quantum Physics ♦ physics:quant-ph
Abstract Any bipartite nonlocal unitary operation can be carried out by teleporting a quantum state from one party to the other, performing the unitary gate locally, and teleporting a state back again. This paper investigates unitaries which can be carried out using less prior entanglement and classical communication than are needed for teleportation. Large families of such unitaries are constructed using (projective) representations of finite groups. Among the tools employed are: a diagrammatic approach for representing entangled states, a theorem on the necessary absence of information at certain times and locations, and a representation of bipartite unitaries based on a group Fourier transform.
Description Reference: Phys. Rev. A 81, 062315 (2010)
Educational Use Research
Learning Resource Type Article


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