Modified Friedmann equations via conformal Bohm–de Broglie gravity

Journal article

We use an alternative interpretation of quantum mechanics, based on the Bohmian trajectory approach, and show that quantum effects can be included in the classical equation of motion via a conformal transformation on the background metric. We apply this method to the Robertson–Walker metric to derive a modified version of Friedmann's equations for a universe consisting of scalar, spin-zero, massive particles. These modified equations include additional terms that result from the nonlocal nature of matter and appear as an acceleration in the expansion of the universe. We see that the same effect may also be present in the case of an inhomogeneous expansion.

Authors: Gregori, G; Reville, B; Larder, B

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Astronomical Society
• Journal: Astrophysical Journal
• Volume: 886
• Issue: 1
• Article number: 50
• Publication date: 2019-11-19
• Acceptance date: 2019-10-04
• EISSN: 1538-4357
• ISSN: 0004-637X
• Language: English
• Keywords: FFR; cosmology: theory – dark energy – dark matter