Characterization of Equivariant Maps and Application to Entanglement Detection
Characterization of Equivariant Maps and Application to Entanglement Detection
复制标题
等变图的表征及其在纠缠检测中的应用
DOI:
10.1007/s00023-020-00941-1
复制
发表时间:
2020
影响因子:
1.5
通讯作者:
Sapra Gunjan
中科院分区:
文献类型:
--
作者:
Bardet Ivan;Collins Benoit;Sapra Gunjan
We study equivariant linear maps between finite-dimensional matrix algebras, as introduced in Collins et al. (Linear Algebra Appl 555:398–411, 2018). These maps satisfy an algebraic property which makes it easy to study their positivity ork-positivity. They are therefore particularly suitable for applications to entanglement detection in quantum information theory. We characterize their Choi matrices. In particular, we focus on a subfamily that we call (a,b)-unitarily equivariant. They can be seen as both a generalization of maps invariant under unitary conjugation as studied by Bhat (Banach J Math Anal 5(2):1–5, 2011) and as a generalization of the equivariant maps studied in Collins et al. (2018). Using representation theory, we fully compute them and study their graphical representation and show that they are basically enough to study all equivariant maps. We finally apply them to the problem of entanglement detection and prove that they form a sufficient (infinite) family of positive maps to detect allk-entangled density matrices.
登录
查看更多内容
DOI:
10.1063/1.5045559
发表时间:
2018
期刊:
--
影响因子:
--
作者:
Alexander Muller
通讯作者:
Alexander Muller
影响因子:
2.9
作者:
F. Spedalieri;A. Doherty;P. Parrilo
通讯作者:
P. Parrilo
影响因子:
4.9
作者:
BARGMANN, V
通讯作者:
BARGMANN, V
影响因子:
1.2
作者:
B. Bhat
通讯作者:
B. Bhat