Monitoring Entanglement Evolution and Collective Quantum Dynamics
Superconductivity
2011-04-05 v3 Quantum Physics
Abstract
We generalize a recently developed scheme for monitoring coherent quantum dynamics with good time-resolution and low backaction [Reuther et al., Phys. Rev. Lett. 102, 033602 (2009)] to the case of more complex quantum dynamics of one or several qubits. The underlying idea is to measure with lock-in techniques the response of the quantum system to a high-frequency ac field. We demonstrate that this scheme also allows one to observe quantum dynamics with many frequency scales, such as that of a qubit undergoing Landau-Zener transitions. Moreover, we propose how to measure the entanglement between two qubits as well as the collective dynamics of qubit arrays.
Cite
@article{arxiv.1007.5493,
title = {Monitoring Entanglement Evolution and Collective Quantum Dynamics},
author = {Georg M. Reuther and David Zueco and Peter Hänggi and Sigmund Kohler},
journal= {arXiv preprint arXiv:1007.5493},
year = {2011}
}
Comments
11 pages, 5 figures