All (qubit) decoherences: Complete characterization and physical implementation
Quantum Physics
2009-11-11 v2
Abstract
We investigate decoherence channels that are modelled as a sequence of collisions of a quantum system (e.g., a qubit) with particles (e.g., qubits) of the environment. We show that collisions induce decoherence when a bi-partite interaction between the system qubit and an environment (reservoir) qubit is described by the controlled-U unitary transformation (gate). We characterize decoherence channels and in the case of a qubit we specify the most general decoherence channel and derive a corresponding master equation. Finally, we analyze entanglement that is generated during the process of decoherence between the system and its environment.
Cite
@article{arxiv.quant-ph/0505040,
title = {All (qubit) decoherences: Complete characterization and physical implementation},
author = {Mario Ziman and Vladimir Buzek},
journal= {arXiv preprint arXiv:quant-ph/0505040},
year = {2009}
}
Comments
10 pages, 3 figures