Exact fluctuation-entanglement relation for bipartite pure states
Year: 2015
Type: preprint
Abstract: We identify a subsystem fluctuation (variance) that measures entanglement in an arbitrary bipartite pure state. This fluctuation is of an observable that generalizes the notion of polarization to an arbitrary N-level subsystem. We express this polarization fluctuation in terms of the order-2 Renyi entanglement entropy and a generalized concurrence. The fluctuation-entanglement relation presented here establishes a framework for experimentally measuring entanglement using Stern-Gerlach-type state selectors.
Source: arXiv (Cornell University)
Institution: University of the Philippines System
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2200331737