Gravity-matter entanglement in Regge quantum gravity

Emergent Quantum Mechanics 2015

Paunkovi, Nikola^1 ; Vojinovi, Marko^2

SQIG - Security and Quantum Information Group, Instituto de Telecomunicacoes, Departamento de Matemática, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, Lisboa

1049-001, Portugal^1

Grupo de Física Matemática, Faculdade de Ciências, Universidade de Lisboa, Edifício C6, Lisboa, Campo Grande

1749-016, Portugal^2

关键词: Effective interactions;    Matter field;    Non-trivial;    Quantum gravity;    Spacetime;    Weak equivalence principle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/701/1/012035/pdf
DOI  :  10.1088/1742-6596/701/1/012035

来源: IOP

【 摘 要 】

We argue that Hartle-Hawking states in the Regge quantum gravity model generically contain non-trivial entanglement between gravity and matter fields. Generic impossibility to talk about "matter in a point of space" is in line with the idea of an emergent spacetime, and as such could be taken as a possible candidate for a criterion for a plausible theory of quantum gravity. Finally, this new entanglement could be seen as an additional "effective interaction", which could possibly bring corrections to the weak equivalence principle.