Characterizing quantum dynamics with initial system-environment correlations
arXiv:1410.5826 · doi:10.1103/PhysRevLett.114.090402
Abstract
We fully characterize the reduced dynamics of an open quantum system initially correlated with its environment. Using a photonic qubit coupled to a simulated environment we tomographically reconstruct a superchannel---a generalised channel that treats preparation procedures as inputs---from measurement of the system alone, despite its coupling to the environment. We introduce novel quantitative measures for determining the strength of initial correlations, and to allow an experiment to be optimised in regards to its environment.
10 pages, 15 figures
References in corpus (10)
- Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
- An Open-System Quantum Simulator with Trapped Ions
- A wavelength-tunable fiber-coupled source of narrowband entangled photons
- Quantum Tomography via Compressed Sensing: Error Bounds, Sample Complexity, and Efficient Estimators
- Vanishing quantum discord is necessary and sufficient for completely positive maps
- Completely Positive Maps and Classical Correlations
- Witness for initial system-environment correlations in open system dynamics
- Vanishing quantum discord is not necessary for completely-positive maps
- How state preparation can affect a quantum experiment: Quantum process tomography for open systems
- Unification of witnessing initial system-environment correlations and witnessing non-Markovianity