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Universal quantum computation in decoherence-free subspaces with hot trapped ions

被引：22
作者：
Aolita, Leandro
Davidovich, Luiz
Kim, Kihwan
Haeffner, Hartmut
机构：
[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil
[2] Max Planck Inst Komplexer Syst, D-01187 Dresden, Germany
[3] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria
[4] Akad Wissensch, Inst Quantenopt & Quanteninformat Osterreich, A-6020 Innsbruck, Austria
来源：
PHYSICAL REVIEW A | 2007年 / 75卷 / 05期
关键词：
D O I：
10.1103/PhysRevA.75.052337
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We consider interactions that generate a universal set of quantum gates on logical qubits encoded in a collective-dephasing-free subspace, and discuss their implementations with trapped ions. This allows for the removal of the by-far largest source of decoherence in current trapped-ion experiments, collective dephasing. In addition, an explicit parametrization of all two-body Hamiltonians able to generate such gates without the system's state ever exiting the protected subspace is provided.
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页数：8
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