Non-Markovian qubit dynamics induced by Coulomb crystals
arXiv:1302.4260 · doi:10.1103/PhysRevA.88.010101
Abstract
We investigate the back-flow of information in a system with a second-order structural phase transition, namely a quasi one-dimensional Coulomb crystal. Using standard Ramsey interferometry which couples a target ion (the system) to the rest of the chain (a phononic environment), we study the non-Markovian character of the resulting open system dynamics. We study two different time-scales and show that the back-flow of information pinpoints both the phase transition and different dynamical features of the chain as it approaches criticality. We also establish an exact link between the back-flow of information and the Ramsey fringe visibility.
5 pages, 3 figures
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- Two-step procedure to discriminate discordant from classical correlated or factorized states
- Entanglement Generation Using Discrete Solitons in Coulomb Crystals
- Momentum-Resolved and Correlations Spectroscopy Using Quantum Probes
- Bose-Hubbard lattice as a controllable environment for open quantum systems
- Quantum reservoirs with ion chains
- Determining the squeezing in multimode fields using nonlocal quantum probes
- Read-out of Quasi-periodic Systems using Qubits
- Mechanisms of irreversible decoherence in solids