Universal dephasing control during quantum computation

Goren Gordon*, Gershon Kurizki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Dephasing is a ubiquitous phenomenon that leads to the loss of coherence in quantum systems and the corruption of quantum information. We present a universal dynamical control approach to combat dephasing during all stages of quantum computation, namely, storage and single- and two-qubit operators. We show that (a) tailoring multifrequency gate pulses to the dephasing dynamics can increase fidelity; (b) cross-dephasing, introduced by entanglement, can be eliminated by appropriate control fields; (c) counterintuitively and contrary to previous schemes, one can increase the gate duration, while simultaneously increasing the total gate fidelity.

Original languageEnglish
Article number042310
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4
StatePublished - 5 Oct 2007
Externally publishedYes


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