Entanglement versus relaxation and decoherence in a quantum algorithm for quantum chaos

Details Entanglement versus relaxation and decoherence in a quantum algorithm for quantum chaos Entanglement versus relaxation and decoherence in a quantum algorithm for quantum chaos

2003-01-17

arxiv.org/abs/quant-ph/0301086v2

Phys.Rev.A 67, 054303 (2003)

Physics

Quantum Physics

research at Quantware MIPS Center http://www.quantware.ups-tlse.fr, revtex, 5 pages, 5 figures, accepted for publication on PR

Scientific paper

10.1103/PhysRevA.67.054303

We study analytically and numerically the behavior of quantum entanglement in a quantum computer operating an efficient algorithm for quantum chaos. Our results show that in an ideal algorithm the entanglement decays exponentially with the diffusive relaxation rate induced by classical chaos. This decay goes down to a residual level which drops exponentially with the number of qubits n_q. Decoherence destroys the residual entanglement with a rate exponential in n_q.

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