High-Fidelity Adiabatic Passage by Composite Sequences of Chirped Pulses

Boyan T. Torosov, Stéphane Guérin, and Nikolay V. Vitanov

Phys. Rev. Lett. 106, 233001 – Published 6 June 2011

Abstract

We present a method for optimization of the technique of adiabatic passage between two quantum states by composite sequences of frequency-chirped pulses with specific relative phases: composite adiabatic passage (CAP). By choosing the composite phases appropriately the nonadiabatic losses can be canceled to any desired order with sufficiently long sequences, regardless of the nonadiabatic coupling. The values of the composite phases are universal for they do not depend on the pulse shapes and the chirp. The accuracy of the CAP technique and its robustness against parameter variations make CAP suitable for high-fidelity quantum information processing.

Received 17 January 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.233001

Authors & Affiliations

Boyan T. Torosov^1,2, Stéphane Guérin², and Nikolay V. Vitanov¹

¹Department of Physics, Sofia University, 5 James Bourchier Boulevard, 1164 Sofia, Bulgaria
²Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR CNRS 5209, BP 47870, F-21078 Dijon, France