Quantum simulations and experiments on Rabi oscillations of spin qubits: Intrinsic vs extrinsic damping

被引：35

作者：

De Raedt, Hans ^{[1
]}

Barbara, Bernard ^{[2
,3
]}

Miyashita, Seiji ^{[4
,5
]}

Michielsen, Kristel ^{[6
]}

Bertaina, Sylvain ^{[7
,8
]}

Gambarelli, Serge ^{[3
]}

机构：

[1] Univ Groningen, Zernike Inst Adv Mat, Dept Appl Phys, NL-9747 AG Groningen, Netherlands

[2] Univ Grenoble 1, CNRS, Inst Neel, FR-38042 Grenoble 9, France

[3] CEA Grenoble, INAC, Lab Chim Inorgan & Biol, UMR CEA UJF E3, FR-38054 Grenoble 9, France

[4] Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1138656, Japan

[5] JST, CREST, Kawaguchi, Saitama 3320012, Japan

[6] Res Ctr Julich, Julich Supercomp Ctr, Inst Adv Simulat, DE-52425 Julich, Germany

[7] IM2NP CNRS, UMR 6242, FR-13397 Marseille, France

[8] Univ Aix Marseille, Fac Sci & Tech, FR-13397 Marseille, France

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 01期

关键词：

TRANSIENT NUTATIONS; MAGNETIC-RELAXATION; DECAY; MOLECULES;

D O I：

10.1103/PhysRevB.85.014408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electron paramagnetic resonance experiments show that the decay of Rabi oscillations of ensembles of spin qubits depends noticeably on the microwave power, and more precisely on the Rabi frequency, an effect recently called "driven decoherence." By direct numerical solution of the time-dependent Schrodinger equation of the associated many-body system, we scrutinize the different mechanisms that may lead to this type of decoherence. Assuming the effects of dissipation to be negligible (T(1) = infinity), it is shown that a system of dipolar-coupled spins with (even weak) random inhomogeneities is sufficient to explain the salient features of the experimental observations. Some experimental examples are given to illustrate the potential of the numerical simulation approach.

引用

页数：17

共 30 条

[1]

Abragam A., 1961, The principles of nuclear magnetism

[2] Transient nutations decay: The effect of field-modified dipolar interaction [J].