Multiple-pulse coherence enhancement of solid state spin qubits

被引：104

作者：

Witzel, W. M. ^{[1
]}

Das Sarma, S. ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.98.077601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe how the spin coherence time of a localized electron spin in solids, i.e., a solid state spin qubit, can be prolonged by applying designed electron spin resonance pulse sequences. In particular, the spin echo decay due to the spectral diffusion of the electron spin resonance frequency induced by the non-Markovian temporal fluctuations of the nuclear spin flip-flop dynamics can be strongly suppressed using multiple-pulse sequences akin to the Carr-Purcell-Meiboom-Gill pulse sequence in nuclear magnetic resonance. Spin coherence time can be enhanced by factors of 4-10 in GaAs quantum-dot and Si:P quantum computer architectures using composite sequences with an even number of pulses.

引用

页数：4

共 13 条

[1] Electron-spin phase relaxation of phosphorus donors in nuclear-spin-enriched silicon [J].

Abe, E ;

Itoh, KM ;

Isoya, J ;

Yamasaki, S .

PHYSICAL REVIEW B, 2004, 70 (03) :033204-1

[2] EFFECTS OF DIFFUSION ON FREE PRECESSION IN NUCLEAR MAGNETIC RESONANCE EXPERIMENTS [J].

CARR, HY ;

PURCELL, EM .

PHYSICAL REVIEW, 1954, 94 (03) :630-638

[3] Qubit coherence control in a nuclear spin bath - art. no. 045310 [J].

de Sousa, R ;

Shenvi, N ;

Whaley, KB .

PHYSICAL REVIEW B, 2005, 72 (04)

[4] ELECTRON SPIN RESONANCE EXPERIMENTS ON DONORS IN SILICON .2. ELECTRON SPIN RELAXATION EFFECTS [J].

FEHER, G ;

GERE, EA .

PHYSICAL REVIEW, 1959, 114 (05) :1245-1256

[5] SPIN ECHOES [J].

HAHN, EL .

PHYSICAL REVIEW, 1950, 80 (04) :580-594

[6] MODIFIED SPIN-ECHO METHOD FOR MEASURING NUCLEAR RELAXATION TIMES [J].

MEIBOOM, S ;

GILL, D .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1958, 29 (08) :688-691

[7] Coherent manipulation of coupled electron spins in semiconductor quantum dots [J].

Petta, JR ;

Johnson, AC ;

Taylor, JM ;

Laird, EA ;

Yacoby, A ;

Lukin, MD ;

Marcus, CM ;

Hanson, MP ;

Gossard, AC .

SCIENCE, 2005, 309 (5744) :2180-2184

[8] Nonideality of quantum operations with the electron spin of a 31P donor in a Si crystal due to interaction with a nuclear spin system -: art. no. 161302 [J].

Saikin, S ;

Fedichkin, L .

PHYSICAL REVIEW B, 2003, 67 (16)

[9] Universal scaling of hyperfine-induced electron spin echo decay [J].

Shenvi, N ;

de Sousa, R ;

Whaley, KB .

PHYSICAL REVIEW B, 2005, 71 (22)

[10] Electron spin relaxation times of phosphorus donors in silicon [J].

Tyryshkin, AM ;

Lyon, SA ;

Astashkin, AV ;

Raitsimring, AM .

PHYSICAL REVIEW B, 2003, 68 (19)

← 1 2 →