Maximum speed of quantum gate operation
量子物理
2007-05-23 v3
摘要
We consider a quantum gate, driven by a general time-dependent Hamiltonian, that complements the state of a qubit and then adds to it an arbitrary phase shift. It is shown that the minimum operation time of the gate is tau = (h/4E)(1+2 theta/pi), where h is Planck's constant, E is the average over time of the quantum-mechanical average energy, and theta is the phase shift modulo pi.
引用
@article{arxiv.quant-ph/0211167,
title = {Maximum speed of quantum gate operation},
author = {Lev B. Levitin and Tommaso Toffoli and Zachary Walton},
journal= {arXiv preprint arXiv:quant-ph/0211167},
year = {2007}
}
备注
5 page Latex w/ macro file latex-3.tex. Full paper for QS2002 (Quantum Structures) proceedings. This revision fixes two small typos