Time as a consequence of internal coherence

Author(s)

Mendes, Leandro R. S. ^[1] ; Soares-Pinto, Diogo O. ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, Caixa Postal 369, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SC; v. 475, n. 2231 NOV 29 2019.
• Web of Science Citations: 1

Abstract

Time has been an elusive concept to grasp. Although we do not yet understand it properly, there have been advances made in regard to how we can explain it. One such advance is the Page-Wootters mechanism. In this mechanism, time is seen as an inaccessible coordinate and the apparent passage of time arises as a consequence of correlations between the subsystems of a global state. Here we propose a measure that captures the relational character of the mechanism, showing that the internal coherence is the necessary ingredient for the emergence of time in the Page-Wootters model. Also, we connect it to results in quantum thermodynamics, showing that it is directly related to the extractable work from quantum coherence. (AU)

• FAPESP's process: 17/03727-0 - Quantumness of composite systems: geometry, dynamics and thermodynamics
• Grantee: Diogo de Oliveira Soares Pinto
• Support Opportunities: Regular Research Grants