Universality of Uhrig dynamical decoupling for suppressing qubit pure dephasing and relaxation

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dc.creatorYang, Wen
dc.creatorLiu, Ren-Bao
dc.date2008-07-25
dc.date.accessioned2026-07-07T10:13:46Z
dc.date.available2026-07-07T10:13:46Z
dc.descriptionThe optimal $N$-pulse dynamical decoupling discovered by Uhrig for a spin-boson mmodel [Phys. Rev. Lett, {\bf 98}, 100504 (2007)] is proved to be universal in suppressing to $O(T^{N+1})$ the pure dephasing or the longitudinal relaxation of a qubit (or spin-1/2) coupled to a generic bath in a short-time evolution of duration $T$. It is also found that for the purpose of suppressing the longitudinal relaxation, an ideal Uhrig $π$-pulse sequence can be generalized to a sequence consisting of the ideal one superimposed with finite-duration pulses satisfying certain symmetry requirements.
dc.description4 pages, 1 figures
dc.identifierhttps://arxiv.org/abs/0807.4058
dc.identifierhttp://arxiv.org/abs/0807.4058
dc.identifierPhys. Rev. Lett. 101, 180403 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.180403
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172649
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleUniversality of Uhrig dynamical decoupling for suppressing qubit pure dephasing and relaxation
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