Measurement time in double quantum dots
Mesoscale and Nanoscale Physics
2017-11-29 v1 Quantum Physics
Abstract
In this letter, we have considered an electron in a double quantum dot system interacting with a detector represented by a point contact. We present a dynamical model for the gradual decoherence of the density matrix due to the interaction with the detector. The interaction of the qubit (quantum system) on the quantum point contact (environment) leads to a discrete set of pointer states of the double quantum dot (apparatus). The necessary time for the qubit decoherence process (measurement time) has been calculated through this model. The existence of a minimum time for the quantum measurement has been obtained.
Cite
@article{arxiv.1711.09892,
title = {Measurement time in double quantum dots},
author = {H. Cruz},
journal= {arXiv preprint arXiv:1711.09892},
year = {2017}
}
Comments
arXiv admin note: text overlap with arXiv:1711.08259