Please use this identifier to cite or link to this item:
Title: Optimized dynamical decoupling sequences in protecting two-qubit states
Authors: Pan, Y.
Xi, Z.-R.
Gong, J. 
Issue Date: 14-Sep-2011
Citation: Pan, Y., Xi, Z.-R., Gong, J. (2011-09-14). Optimized dynamical decoupling sequences in protecting two-qubit states. Journal of Physics B: Atomic, Molecular and Optical Physics 44 (17) : -. ScholarBank@NUS Repository.
Abstract: Aperiodic dynamical decoupling (DD) sequences of π pulses are of great interest to decoherence control and have been recently extended from single-qubit to two-qubit systems. If the environmental noise power spectrum is made available, then one may further optimize aperiodic DD sequences to reach higher efficiency of decoherence suppression than known universal schemes. This possibility is investigated in this work for the protection of two-qubit states, using an exactly solvable pure dephasing model including both local and nonlocal noise. The performance of optimized DD sequences in protecting two-qubit states is compared with that achieved by nested Uhrig's DD (nested-UDD) sequences, for several different types of noise spectrum. Except for the cases with noise spectrum decaying slowly in the high-frequency regime, optimized DD sequences with tens of control pulses can perform orders of magnitude better than that of nested-UDD. A two-qubit system with highly unbalanced local noise is also examined to shed more light on a recent experiment. Possible experiments that may be motivated by this work are discussed. © 2011 IOP Publishing Ltd.
Source Title: Journal of Physics B: Atomic, Molecular and Optical Physics
ISSN: 09534075
DOI: 10.1088/0953-4075/44/17/175501
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 25, 2019


checked on Mar 6, 2019

Page view(s)

checked on Jan 11, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.