Elementary gates for quantum information with superposed coherent states

被引：65

作者：

Marek, Petr ^{[1
]}

Fiurasek, Jaromir ^{[1
]}

机构：

[1] Palacky Univ, Dept Opt, CZ-77146 Olomouc, Czech Republic

来源：

PHYSICAL REVIEW A | 2010年 / 82卷 / 01期

关键词：

All Open Access; Green;

D O I：

10.1103/PhysRevA.82.014304

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose an alternative way of implementing several elementary quantum gates for qubits in the coherent-state basis. The operations are probabilistic and employ single-photon subtractions as the driving force. Our schemes for single-qubit PHASE gate and two-qubit controlled PHASE gate are capable of achieving arbitrarily large phase shifts with currently available resources, which makes them suitable for the near-future tests of quantum-information processing with superposed coherent states.

引用

页数：4

共 13 条

[1]

Briegel HJ, 2009, NAT PHYS, V5, P19, DOI [10.1038/NPHYS1157, 10.1038/nphys1157]

[2]

GERRITS T, ARXIV10042727

[3] Efficient quantum computation using coherent states [J].

Jeong, H ;

Kim, MS .

PHYSICAL REVIEW A, 2002, 65 (04) :6

[4] A scheme for efficient quantum computation with linear optics [J].

Knill, E ;

Laflamme, R ;

Milburn, GJ .

NATURE, 2001, 409 (6816) :46-52

[5] Generation of a superposition of odd photon number states for quantum information networks [J].

Neergaard-Nielsen, J. S. ;

Nielsen, B. Melholt ;

Hettich, C. ;

Molmer, K. ;

Polzik, E. S. .

PHYSICAL REVIEW LETTERS, 2006, 97 (08)

[6]

NEERGAARDNIELSE.JS, ARXIV10023211V1QUANT

[7] Improvement on teleportation of continuous variables by photon subtraction via conditional measurement [J].

Opatrny, T ;

Kurizki, G ;

Welsch, DG .

PHYSICAL REVIEW A, 2000, 61 (03) :7

[8] Generation of optical "Schrodinger cats' from photon number states [J].

Ourjoumtsev, Alexei ;

Jeong, Hyunseok ;

Tualle-Brouri, Rosa ;

Grangier, Philippe .

NATURE, 2007, 448 (7155) :784-786

[9] Displacement operator by beam splitter [J].

Paris, MGA .

PHYSICS LETTERS A, 1996, 217 (2-3) :78-80

[10] Quantum computation with optical coherent states [J].

Ralph, TC ;

Gilchrist, A ;

Milburn, GJ ;

Munro, WJ ;

Glancy, S .

PHYSICAL REVIEW A, 2003, 68 (04)

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