Rundle_2020_J._Phys._Commun._4_025002.pdf (1.28 MB)
Download fileVisualization of correlations in hybrid discrete—continuous variable quantum systems
journal contribution
posted on 2020-03-11, 12:09 authored by Russell Rundle, Ben Davies, Vincent Dwyer, Todd Tilma, Mark EverittMark EverittIn this work we construct Wigner functions for hybrid continuous and discrete variable quantum systems. We demonstrate new capabilities in the visualization of the interactions and correlations between discrete and continuous variable quantum systems, where visualizing the full phase space has proven difficult in the past due to the high number of degrees of freedom. Specifically, we show how to clearly distinguish signatures that arise due to quantum and classical correlations in an entangled Bellcat state. We further show how correlations are manifested in different types of interaction, leading to a deeper understanding of how quantum information is shared between two subsystems. Understanding the nature of the correlations between systems is central to harnessing quantum effects for information processing; the methods presented here reveal the nature of these correlations, allowing a clear visualization of the quantum information present in these hybrid discrete-continuous variable quantum systems. The methods presented here could be viewed as a form of quantum state spectroscopy.
Funding
EPSRC [grant number EP/N509516/1]
JSPS KAKENHI (C) Grant Number JP17K05569
History
School
- Science
- Mechanical, Electrical and Manufacturing Engineering
Department
- Physics
Published in
Journal of Physics CommunicationsVolume
4Issue
2Publisher
IOP PublishingVersion
- VoR (Version of Record)
Rights holder
© The AuthorsPublisher statement
Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence (https://creativecommons.org/licenses/by/4.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Acceptance date
2020-01-24Publication date
2020-02-04Copyright date
2020eISSN
2399-6528Publisher version
Language
- en