Squashing model for detectors and applications to quantum-key-distribution protocols

被引：42

作者：

Gittsovich, O. ^{[1
,2
]}

Beaudry, N. J. ^{[1
,2
,3
]}

Narasimhachar, V. ^{[1
,2
]}

Alvarez, R. Romero ^{[1
,2
,4
]}

Moroder, T. ^{[1
,2
,5
]}

Luetkenhaus, N. ^{[1
,2
]}

机构：

[1] Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada

[2] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[3] ETH, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[4] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[5] Univ Siegen, Nat Wissensch Tech Fak, D-57068 Siegen, Germany

来源：

PHYSICAL REVIEW A | 2014年 / 89卷 / 01期

基金：

加拿大自然科学与工程研究理事会; 奥地利科学基金会;

关键词：

SECURITY;

D O I：

10.1103/PhysRevA.89.012325

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We develop a framework that allows a description of measurements in Hilbert spaces that is smaller than their natural representation. This description, which we call a "squashing model," consists of a squashing map that maps the input states of the measurement from the original Hilbert space to the smaller one, followed by a targeted prescribed measurement on the smaller Hilbert space. This framework has applications in quantum key distribution, but also in other cryptographic tasks, as it greatly simplifies the theoretical analysis under adversarial conditions.

引用

页数：25

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