Spin-Echo Dynamics of a Heavy Hole in a Quantum Dot

被引：26

作者：

Wang, Xiaoya Judy ^{[1
]}

Chesi, Stefano ^{[1
]}

Coish, W. A. ^{[1
]}

机构：

[1] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 23期

基金：

加拿大自然科学与工程研究理事会;

关键词：

COUPLED ELECTRON; NUCLEAR SPINS;

D O I：

10.1103/PhysRevLett.109.237601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We develop a theory for the spin-echo dynamics of a heavy hole in a quantum dot, accounting for both hyperfine- and electric-field-induced fluctuations. We show that a moderate applied magnetic field can drive this system to a motional-averaging regime, making the hyperfine interaction ineffective as a decoherence source. Furthermore, we show that decay of the spin-echo envelope is highly sensitive to the geometry. In particular, we find a specific choice of initialization and pi-pulse axes which can be used to study intrinsic hyperfine-induced hole-spin dynamics, even in systems with substantial electric-fieldinduced dephasing. These results point the way to designed hole-spin qubits as a robust and long-lived alternative to electron spins. DOI: 10.1103/PhysRevLett.109.237601

引用

页数：5

共 31 条

[1] Dephasing time of GaAs electron-spin qubits coupled to a nuclear bath exceeding 200 μs [J].

Bluhm, Hendrik ;

Foletti, Sandra ;

Neder, Izhar ;

Rudner, Mark ;

Mahalu, Diana ;

Umansky, Vladimir ;

Yacoby, Amir .

NATURE PHYSICS, 2011, 7 (02) :109-113

[2] A Coherent Single-Hole Spin in a Semiconductor [J].

Brunner, Daniel ;

Gerardot, Brian D. ;

Dalgarno, Paul A. ;

Wuest, Gunter ;

Karrai, Khaled ;

Stoltz, Nick G. ;

Petroff, Pierre M. ;

Warburton, Richard J. .

SCIENCE, 2009, 325 (5936) :70-72

[3] Direct Measurement of the Hole-Nuclear Spin Interaction in Single InP/GaInP Quantum Dots Using Photoluminescence Spectroscopy [J].

Chekhovich, E. A. ;

Krysa, A. B. ;

Skolnick, M. S. ;

Tartakovskii, A. I. .

PHYSICAL REVIEW LETTERS, 2011, 106 (02)

[4]

Chekhovich E.A., ARXIV11090733

[5] Coherent dynamics of coupled electron and nuclear spin qubits in diamond [J].

Childress, L. ;

Dutt, M. V. Gurudev ;

Taylor, J. M. ;

Zibrov, A. S. ;

Jelezko, F. ;

Wrachtrup, J. ;

Hemmer, P. R. ;

Lukin, M. D. .

SCIENCE, 2006, 314 (5797) :281-285

[6] Nuclear spins in nanostructures [J].

Coish, W. A. ;

Baugh, J. .

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2009, 246 (10) :2203-2215

[7] Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics [J].

Coish, WA ;

Loss, D .

PHYSICAL REVIEW B, 2004, 70 (19) :1-21

[8] Electron Spin Dephasing due to Hyperfine Interactions with a Nuclear Spin Bath [J].

Cywinski, Lukasz ;

Witzel, Wayne M. ;

Das Sarma, S. .

PHYSICAL REVIEW LETTERS, 2009, 102 (05)

[9]

De Greve K, 2011, NAT PHYS, V7, P872, DOI [10.1038/nphys2078, 10.1038/NPHYS2078]

[10] Theory of nuclear-induced spectral diffusion: Spin decoherence of phosphorus donors in Si and GaAs quantum dots [J].

de Sousa, R ;

Das Sarma, S .

PHYSICAL REVIEW B, 2003, 68 (11) :1153221-11532213

← 1 2 3 4 →