|
|
Instituto de Ciencia de Materiales de Madrid |
|
|||
| Condensed Matter Theory | |||||
| Sigmund Kohler | home | cv | research | publications | ||||
Coherence stabilization of a two-qubit gate by ac fieldsKaren M. Fonseca-Romero, Sigmund Kohler, and Peter HänggiPhys. Rev. Lett. 95, 140502 (2005) We consider a CNOT gate operation under the influence of quantum bit-flip noise and demonstrate that ac fields can change bit-flip noise into phase noise and thereby improve coherence up to several orders of magnitude while the gate operation time remains unchanged. Within a high-frequency approximation, both purity and fidelity of the gate operation are studied analytically. The numerical treatment with a Bloch-Redfield master equation confirms the analytical results. arXiv:cond-mat/0409774 |
[ICMM-CSIC]
[Condensed Matter Theory]
last modified: 8.10.2025 by
Sigmund Kohler