Geometrical spin dephasing in quantum dots

被引：53

作者：

San-Jose, Pablo

Zarand, Gergely

Shnirman, Alexander

Schoen, Gerd

机构：

[1] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany

[2] Univ Karlsruhe, DFG Ctr Funct Nanostruct, D-76128 Karlsruhe, Germany

[3] Tech Univ Budapest, Inst Phys, H-1521 Budapest, Hungary

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 07期

关键词：

ELECTRON-SPIN; PHASE-FACTORS; RELAXATION;

D O I：

10.1103/PhysRevLett.97.076803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study spin-orbit mediated relaxation and dephasing of electron spins in quantum dots. We show that higher order contributions provide a relaxation mechanism that dominates for low magnetic fields and is of geometrical origin. In the low-field limit relaxation is dominated by coupling to electron-hole excitations and possibly 1/f noise rather than phonons.

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页数：4

相关论文

共 27 条

[1] DONOR ELECTRON SPIN RELAXATION IN SILICON [J].

ABRAHAMS, E .

PHYSICAL REVIEW, 1957, 107 (02) :491-496

[2] SPIN-ORBIT BERRY PHASE IN CONDUCTING RINGS [J].

ARONOV, AG ;

LYANDAGELLER, YB .

PHYSICAL REVIEW LETTERS, 1993, 70 (03) :343-346

[3] Temperature square dependence of the low frequency 1/f charge noise in the Josephson junction qubits [J].

Astafiev, O ;

Pashkin, YA ;

Nakamura, Y ;

Yamamoto, T ;

Tsai, JS .

PHYSICAL REVIEW LETTERS, 2006, 96 (13)

[4] Quantum noise in the Josephson charge qubit [J].

Astafiev, O ;

Pashkin, YA ;

Nakamura, Y ;

Yamamoto, T ;

Tsai, JS .

PHYSICAL REVIEW LETTERS, 2004, 93 (26)

[5] QUANTAL PHASE-FACTORS ACCOMPANYING ADIABATIC CHANGES [J].

BERRY, MV .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1984, 392 (1802) :45-57

[6] GENERALIZED THEORY OF RELAXATION [J].

BLOCH, F .

PHYSICAL REVIEW, 1957, 105 (04) :1206-1222

[7] Spin decay in a quantum dot coupled to a quantum point contact [J].

Borhani, M ;

Golovach, VN ;

Loss, D .

PHYSICAL REVIEW B, 2006, 73 (15)

[8] THEORY OF THE EFFECT OF SPIN-ORBIT COUPLING ON MAGNETIC RESONANCE IN SOME SEMICONDUCTORS [J].

ELLIOTT, RJ .

PHYSICAL REVIEW, 1954, 96 (02) :266-279

[9]

Elzerman JM, 2004, NATURE, V430, P431, DOI [10.1038/nature02693, 10.1039/nature02693]

[10] Models of environment and T1 relaxation in Josephson charge qubits -: art. no. 046805 [J].

Faoro, L ;

Bergli, J ;

Altshuler, BL ;

Galperin, YM .

PHYSICAL REVIEW LETTERS, 2005, 95 (04)