Dynamically localized systems: entanglement exponential sensitivity and efficient quantum simulations

Details Dynamically localized systems: entanglement exponential sensitivity and efficient quantum simulations Dynamically localized systems: entanglement exponential sensitivity and efficient quantum simulations

2004-05-11

arxiv.org/abs/quant-ph/0405054v1

Phys. Rev. A 70, 032311 (2004)

Physics

Quantum Physics

5 pages, 6 figures

Scientific paper

10.1103/PhysRevA.70.032311

We study the pairwise entanglement present in a quantum computer that simulates a dynamically localized system. We show that the concurrence is exponentially sensitive to changes in the Hamiltonian of the simulated system. Moreover, concurrence is exponentially sensitive to the ``logic'' position of the qubits chosen. These sensitivities could be experimentally checked efficiently by means of quantum simulations with less than ten qubits. We also show that the feasibility of efficient quantum simulations is deeply connected to the dynamical regime of the simulated system.

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