Work

Gravity-mediated entanglement between oscillators as quantum superposition of geometries

Year: 2024

Type: article

Abstract: Protocols for observing gravity induced entanglement typically comprise the interaction of two particles prepared either in a superposition of two discrete paths or in a continuously delocalized (harmonic oscillator) state of motion. An important open question has been whether these two different approaches allow one to draw the same conclusions on the quantum nature of gravity. To answer this question, we use a path-integral approach to analyze a setup that contains both features: a superposition of two highly delocalized center of mass states. In both cases the appearance of entanglement, within linearized quantum gravity, is due to gravity being in a superposition of distinct geometries.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.110.056046

Authors: Ofek Bengyat, Andrea Di Biagio, Markus Aspelmeyer, Marios Christodoulou

Institutions: University of Vienna, Austrian Academy of Sciences

Language: English

Topic: Noncommutative and Quantum Gravity Theories

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: John Templeton Foundation

Awards: The Quantum Information Structure of Spacetime (QISS), Second Phase, The Quantum Information Structure of Spacetime (QISS)