Efficient C-Phase gate for single-spin qubits in quantum dots

Autor:	Meunier, T., Calado, V. E., Vandersypen, L. M. K.
Rok vydání:	2010
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Quantum Physics
Zdroj:	Phys. Rev. B 83, 121403(R) (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.83.121403
Popis:	Two-qubit interactions are at the heart of quantum information processing. For single-spin qubits in semiconductor quantum dots, the exchange gate has always been considered the natural two-qubit gate. The recent integration of magnetic field or g-factor gradients in coupled quantum dot systems allows for a one-step, robust realization of the controlled phase (C-Phase) gate instead. We analyze the C-Phase gate durations and fidelities that can be obtained under realistic conditions, including the effects of charge and nuclear field fluctuations, and find gate error probabilities of below 10-4, possibly allowing fault-tolerant quantum computation. Comment: 5 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1010.0164 Zobrazit plný text záznamu View this record from Arxiv