Quantum effects in scalar-tensor gravity
Seminars
Seminar “Modern Mathematical Physics”
Date and Time: Tuesday, 11 February 2020, at 2:30 PM
Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: “Quantum effects in scalar-tensor gravity”
Speaker: Boris Latosh (Sussex Univ., UK)
Abstract:
Scalar-tensor gravity plays a special role within modified gravity models. These models provide the simplest modification of general relativity and describe new physical phenomena both at the scale of compact objects and at the scale of the Universe as a whole. Quantum effects taking place in such models due to the new scalar degree of freedom are of special interest, as they can influence the structure of a theory in a non-trivial way.
The report provides a brief review of scalar-tensor models and their role within modified gravity. Effective field theory formalism is used to study corresponding quantum effects. Its applicability for gravity models and relation with scalar-tensor gravity are discussed. Certain results of effective field theory implementations for general relativity and scalar-tensor gravity suggesting a non-trivial behaviour associated with the new scalar degree of freedom are to be presented.