Entanglement witnesses with variable number of local measurements

Entanglement witnesses with variable number of local measurements

We present a class of entanglement identifiers which has the following experimentally friendly feature: once the expectation value of the identifier exceeds some definite limit, we can conclude the state is entangled, even if not all measurements defining the identifier have been performed. These id...

Full description

Saved in:
Bibliographic Details
Main Authors: Laskowski, Wiesław, Markiewicz, Marcin, Paterek, Tomasz, Weinar, Ryszard
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2014
Subjects:
DRNTU::Science::Chemistry::Physical chemistry::Quantum chemistry
Online Access:https://hdl.handle.net/10356/101837
http://hdl.handle.net/10220/18763
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
Description
Summary:We present a class of entanglement identifiers which has the following experimentally friendly feature: once the expectation value of the identifier exceeds some definite limit, we can conclude the state is entangled, even if not all measurements defining the identifier have been performed. These identifiers are in the form of sums of non-negative functions of correlations in a quantum state, mostly squares of correlations, and we illustrate their use and strengths on various examples.

Similar Items