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Entanglement Echoes in Quantum Computation
Davide Rossini, Giuliano Benenti, Giulio Casati
We study the stability of entanglement in a quantum computer implementing an efficient quantum algorithm, which simulates a quantum chaotic dynamics. For this purpose, we perform a…
Stability of Quantum Motion: Beyond Fermi-golden-rule and Lyapunov decay
Wen-ge Wang, G. Casati, Baowen Li
We study, analytically and numerically, the stability of quantum motion for a classically chaotic system. We show the existence of different regimes of fidelity decay which deviate…
Fourier law in the alternate mass hard-core potential chain
Baowen Li, Giulio Casati, Jiao Wang +1
We study energy transport in a one-dimensional model of elastically colliding particles with alternate masses and . In order to prevent total momentum conservation we confin…
Measurement and Information Extraction in Complex Dynamics Quantum Computation
G. Casati, S. Montangero
We address the problem related to the extraction of the information in the simulation of complex dynamics quantum computation. Here we present an example where important informatio…
Teleportation in a noisy environment: a quantum trajectories approach
Gabriel G Carlo, Giuliano Benenti, Giulio Casati
We study the fidelity of quantum teleportation for the situation in which quantum logic gates are used to provide the long distance entanglement required in the protocol, and where…
Decay of the classical Loschmidt echo in integrable systems
Giuliano Benenti, Giulio Casati, Gregor Veble
We study both analytically and numerically the decay of fidelity of classical motion for integrable systems. We find that the decay can exhibit two qualitatively different behavior…