Two-photon tomography using on-chip quantum walks

被引：21
|
作者：
Titchener, James G. [1 ]
Solntsev, Alexander S. [1 ]
Sukhorukov, Andrey A. [1 ]
机构：
[1] Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia
来源：
OPTICS LETTERS | 2016年 / 41卷 / 17期
基金：
澳大利亚研究理事会;
关键词：
STATES;
D O I：
10.1364/OL.41.004079
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present an approach to quantum tomography based on first expanding a quantum state across extra degrees of freedom and then exploiting the introduced sparsity to perform reconstruction. We formulate its application to photonic circuits and show that measured spatial photon correlations at the output of a specially tailored discrete-continuous quantum walk can enable full reconstruction of any two-photon spatially entangled and mixed state at the input. This approach does not require any tunable elements, so it is well suited for integration with on-chip superconducting photon detectors. (C) 2016 Optical Society of America
引用
收藏
页码：4079 / 4082
页数：4
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