Improving producibility estimation for mixed quantum states
Year: 2021
Type: preprint
Abstract: We introduce a new functional to estimate the producibility of mixed quantum states. When applicable, this functional outperforms the quantum Fisher information, and can be operatively exploited to characterize quantum states and phases by multipartite entanglement. The rationale is that producibility is expressible in terms of one- and two-point correlation functions only. This is especially valuable whenever the experimental measurements and the numerical simulation of other estimators result to be difficult, if not out of reach. We trace the theoretical usability perimeter of the new estimator and provide simulational evidence of paradigmatic spin examples.
Source: arXiv (Cornell University)
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3191720978