QUANTUM INFORMATION PROCESSING WITH QUANTUM ZENO MANY-BODY DYNAMICS

被引:0
|
作者
Monras, Alex [1 ,2 ]
Romero-Isart, Oriol [3 ]
机构
[1] Univ Salerno, Dipartimento Matemat & Informat, Fisciano, SA, Italy
[2] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England
[3] Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Catalonia, Spain
关键词
quantum information & computation; quantum zeno effect; many-body dynamics; spin chains;
D O I
暂无
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
We show how the quantum Zeno effect can be exploited to control quantum many-body dynamics for quantum information and computation purposes. In particular, we consider a one dimensional array of three level systems interacting via a nearest-neighbour interaction. By encoding the qubit on two levels and using simple projective frequent measurements yielding the quantum Zeno effect, we demonstrate how to implement a well defined quantum register, quantum state transfer on demand, universal two-qubit gates and two-qubit parity measurements. Thus, we argue that the main ingredients for universal quantum computation can be achieved in a spin chain with an always-on and constant many-body Hamiltonian. We also show some possible modifications of the initially assumed dynamics in order to create maximally entangled qubit pairs and single qubit gates.
引用
收藏
页码:201 / 222
页数:22
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