中文

All (qubit) decoherences: Complete characterization and physical implementation

量子物理 2009-11-11 v2

摘要

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.

关键词

引用

@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}
}

备注

10 pages, 3 figures