Conditional quantum evolution induced by continuous measurement for a mesoscopic qubit
介观与纳米尺度物理
2007-05-23 v1
摘要
We consider the problem of an electron tunneling between two coupled quantum dots, a two-state quantum system (qubit), using a low-transparency point contact (PC) or tunnel junction as a detector continually measuring the position of the electron. We focus on the qubit dynamics conditioned on a particular realization of the actual measured current through the PC device. We illustrate the conditional evolutions by numerical simulations. The different behaviors between unconditional and conditional evolutions are demonstrated. The conditional qubit dynamics evolving from quantum jumps to quantum diffusion is presented.
引用
@article{arxiv.cond-mat/0102058,
title = {Conditional quantum evolution induced by continuous measurement for a mesoscopic qubit},
author = {Hsi-Sheng Goan and Gerard J. Milburn},
journal= {arXiv preprint arXiv:cond-mat/0102058},
year = {2007}
}
备注
4 pages. Submitted to the IQC01 conference proceedings