Detecting the concurrence of an unknown state with a single observable

TL;DR

This paper introduces an experimentally feasible method to derive a lower bound for the concurrence of bipartite mixed quantum states, simplifying entanglement quantification across various dimensions.

Contribution

It provides an analytical lower bound for concurrence that can be implemented experimentally, advancing practical entanglement detection methods.

Findings

Derived an analytical lower bound for concurrence

Bound is experimentally implementable

Applicable to bipartite mixed states in arbitrary dimensions

Abstract

While the detection of entanglement has been proved already to be quite a difficult task, experimental quantification of entanglement is even more challenging. In this work, we derive an analytical lower bound for the concurrence of a bipartite mix quantum state in arbitrary dimension. The lower bound is experimentally implementable in a feasible way, which enabling quantification of entanglement in a broad variety of cases