Disentanglement and decoherence in two-spin and three-spin systems under dephasing

被引：49

作者：

Ann, Kevin

Jaeger, Gregg

机构：

[1] Boston Univ, Dept Phys, Boston, MA 02215 USA

[2] Boston Univ, Dept Elect & Comp Engn, Quantum Imaging Lab, Boston, MA 02215 USA

[3] Boston Univ, Div Nat Sci, Boston, MA 02215 USA

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.75.115307

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We compare disentanglement and decoherence rates within two-spin and three-spin entangled systems subjected to all possible combinations of local and collective pure dephasing noise combinations. In all cases, the bipartite entanglement decay rate is found to be greater than or equal to the dephasing-decoherence rates and often significantly greater. This sharpens previous results for two-spin systems [T. Yu and J. H. Ebenly Phys. Rev. B 68, 165322 (2003)] and extends them to the three-spin context.

引用

页数：12

共 19 条

[1] Distributed entanglement [J].

Coffman, V ;

Kundu, J ;

Wootters, WK .

PHYSICAL REVIEW A, 2000, 61 (05) :5

[2] Quantum interference and evolution of entanglement in a system of three-level atoms [J].

Derkacz, Lukasz ;

Jakobczyk, Lech .

PHYSICAL REVIEW A, 2006, 74 (03)

[3] Three qubits can be entangled in two inequivalent ways [J].

Dur, W. ;

Vidal, G. ;

Cirac, J.I. .

Physical Review A - Atomic, Molecular, and Optical Physics, 2000, 62 (06) :062314-062311

[4] Dark periods and revivals of entanglement in a two-qubit system [J].

Ficek, Z. ;

Tanas, R. .

PHYSICAL REVIEW A, 2006, 74 (02)

[5]

Jaeger Gregg, 2006, QUANTUM INFORM OVERV

[6] Experimental verification of decoherence-free subspaces [J].

Kwiat, PG ;

Berglund, AJ ;

Altepeter, JB ;

White, AG .

SCIENCE, 2000, 290 (5491) :498-501

[7] Perfect quantum error correcting code [J].

Laflamme, R ;

Miquel, C ;

Paz, JP ;

Zurek, WH .

PHYSICAL REVIEW LETTERS, 1996, 77 (01) :198-201

[8]

Lidar DA, 2003, LECT NOTES PHYS, V622, P83

[9]

Nielsen M.A., 2002, Quantum computation and quantum information, DOI DOI 10.1119/1.1463744

[10] General theory of the decoherence effect in quantum mechanics [J].

Omnes, R .

PHYSICAL REVIEW A, 1997, 56 (05) :3383-3394

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