Work

Squeezing and Entanglement of Vacuum Modes Across a Bounce

Year: 2026

Type: article

Abstract: On a cosmological bounce background with a single minimum of the scale factor and unit duration, in units set by that duration, the quantities reported here are obtained by direct numerical evolution of the field modes from the contracting branch to the expanding branch. The longest mode computed, at wavenumber 0.1, is squeezed by 4.153 units and carries an entanglement entropy of 7.921 natural units per pair. At wavenumber 1 the squeezing parameter is 0.545 and the occupation is 3.281e-01. The calculation is performed on a stated model background with stated vacuum conventions, and the code and full-precision output are deposited with the paper. This study is simulated and computed from those assumptions; it is not a measurement.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.24125977

Author: Aldred, William Alexander

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7225788453

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