title: Nonperturbative dynamical decoupling with random control.
abstract: Parametric fluctuations or stochastic signals are introduced into the rectangular pulse sequence to investigate the feasibility of random dynamical decoupling. In a large parameter region, we find that the out-of-order control pulses work as well as the regular pulses for dynamical decoupling and dissipation suppression. Calculations and analysis are enabled by and based on a nonperturbative dynamical decoupling approach allowed by an exact quantum-state-diffusion equation. When the average frequency and duration of the pulse sequence take proper values, the random control sequence is robust, fault-tolerant, and insensitive to pulse strength deviations and interpulse temporal separation in the quasi-periodic sequence. This relaxes the operational requirements placed on quantum control devices to a great deal.
authors.affiliation: 1] Institute of Atomic and Molecular Physics, Jilin University, Chuangchun 130012, Jilin, China [2] Department of Theoretical Physics and History of Science, The Basque Country University (EHU/UPV), PO Box 644, 48080 Bilbao Spain.
authors.forename: Jun
authors.initials: J
authors.lastname: Jing
authors.affiliation: Qubitekk Inc., San Diego, CA 92081, USA.
authors.forename: C Allen
authors.initials: CA
authors.lastname: Bishop
authors.affiliation: 1] Department of Theoretical Physics and History of Science, The Basque Country University (EHU/UPV), PO Box 644, 48080 Bilbao Spain [2] Ikerbasque, Basque Foundation for Science, 48011 Bilbao Spain.
authors.forename: Lian-Ao
authors.initials: LA
authors.lastname: Wu