Fast and robust quantum computation with ionic Wigner crystals

被引：8

作者：

Baltrusch, J. D. ^{[1
,2
,3
]}

Negretti, A. ^{[1
]}

Taylor, J. M. ^{[4
,5
]}

Calarco, T. ^{[1
,6
,7
]}

机构：

[1] Univ Ulm, Inst Quantum Informat Proc, D-89069 Ulm, Germany

[2] Univ Autonoma Barcelona, Grp Opt, E-08193 Bellaterra, Barcelona, Spain

[3] Univ Saarland, D-66041 Saarbrucken, Germany

[4] NIST, College Pk, MD 20742 USA

[5] Joint Quantum Inst, College Pk, MD 20742 USA

[6] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[7] ITAMP, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW A | 2011年 / 83卷 / 04期

关键词：

TRAP; COMPUTER; IMPLEMENTATION; ARCHITECTURE; PLASMAS; ATOM;

D O I：

10.1103/PhysRevA.83.042319

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a detailed analysis of the modulated-carrier quantum phase gate implemented withWigner crystals of ions confined in Penning traps. We elaborate on a recent scheme, proposed by two of the authors, to engineer two-body interactions between ions in such crystals. We analyze the situation in which the cyclotron (omega(c)) and the crystal rotation (omega(r)) frequencies do not fulfill the condition omega(c) = 2 omega(r). It is shown that even in the presence of the magnetic field in the rotating frame the many-body (classical) Hamiltonian describing small oscillations from the ion equilibrium positions can be recast in canonical form. As a consequence, we are able to demonstrate that fast and robust two-qubit gates are achievable within the current experimental limitations. Moreover, we describe a realization of the state-dependent sign-changing dipole forces needed to realize the investigated quantum computing scheme.

引用

页数：13

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