Past Events
[Quast Seminar] Dario Cafasso
2024-05-30Title: Quantum Time-Dilation in Qubit Hypersurfaces
Abstract: The use of quantum spin systems to study the phenomenon of quantum time dilation leads to new insights into the quantum description of gravity. The basis of this description is the Page and Wootters mechanism, where entanglement between two quantum systems allows one to act as a clock for the other, influencing its time evolution. Intriguingly, when the clock system experiences a "gravitational-like interaction", the resulting time evolution can be described by a Time-Dilated Schrödinger equation. This equation includes a "redshift operator," a purely quantum effect that mimics gravitational time dilation. Here we discuss a novel, finite-dimensional framework in which a network of qubit systems can be used as a "global" clock for another non-interacting component of the universe. The result is the Time-Dilation induced Interaction Transfer (TiDIT) mechanism. TiDIT describes how time dilation due to the interaction of a qubit effectively changes the interaction between previously non-interacting parts of the universe. We will explore this concept with a practical example using two coupled qubits as a model for the quantum clock.
[QUAST Seminar] Mykhaylo Usatyuk: Closed universes in two dimensional gravity
2024-05-14Dr Mykhaylo Usatyuk
Kavli Institute for Theoretical Physics, Santa Barbara
[QUAST Seminar] Ronak Soni: Extremality as a Consistency Condition on Subregion Duality
2024-05-07Ronak Soni
University of Cambridge, DAMTP
[QUAST Seminar] Ana-Maria Raclariu: Entanglement, soft modes and celestial holography
2024-04-25Ana-Maria Raclariu
King's College London
[QUAST Seminar] Aaron Poole: Thermodynamics of accelerating AdS_4 black holes from the covariant phase space
2024-03-18Thermodynamics of accelerating AdS_4 black holes from the covariant phase space
Aaron Poole
Kyung Hee University, South Korea
[QUAST Seminar] Bilyana Tomova - Asymptotic symmetries of gravity
2023-11-20Asymptotic symmetries of gravity,
Bilyana Tomova,
OIST
[QUAST Seminar]: Elliott Gesteau - Large N von Neumann algebras and the renormalization of Newton's constant
2023-11-15Large N von Neumann algebras and the renormalization of Newton's constant
Elliott Gesteau
Caltech
QUAST seminar: Francesco Sartini
2023-10-30Francesco Sartini (OIST): Hidden symmetry in cosmology and black holes
QUAST Seminar: Patricia Ribes Metidieri
2023-06-29Patricia Ribes Metidieri, Radboud University: How ubiquitous is entanglement in quantum field theory?
[Seminar] Kavan Modi (Monash), Quantum Chaos = Volume-Law Spatiotemporal Entanglement
2023-03-20Seminar by Kavan Modi (Monash), Mon Mar 20 2pm JST