Immunity of information encoded in decoherence-free subspaces to particle loss

被引：6

作者：

Migdal, Piotr ^{[1
,2
]}

Banaszek, Konrad ^{[1
]}

机构：

[1] Uniwersytet Warszawski, Inst Fizyki Teoretycznej, Wydzial Fizyki, PL-00681 Warsaw, Poland

[2] ICFO Inst Ciencies Foton, ES-08860 Barcelona, Spain

来源：

PHYSICAL REVIEW A | 2011年 / 84卷 / 05期

关键词：

QUANTUM COMPUTATION; COHERENCE;

D O I：

10.1103/PhysRevA.84.052318

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate that for an ensemble of qudits, subjected to collective decoherence in the form of perfectly correlated random SU(d) unitaries, quantum superpositions stored in the decoherence-free subspace are fully immune against the removal of one particle. This provides a feasible scheme to protect quantum information encoded in the polarization state of a sequence of photons against both collective depolarization and one-photon loss and can be demonstrated with photon quadruplets using currently available technology.

引用

页数：4

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