TITLE : Quantum circuit model of black hole evaporation with tunable semi-causality violation

ABSTRACT :

I will discuss a simple four-qubit quantum circuit model of black hole evaporation and explore the consequences of violating the semi-causality condition, allowing information to flow from the black hole interior back to the exterior. To implement the semi-causality violation, we introduce a parametrized controlled-unitary gate that allows us to continuously tune the amount of information flowing back from the black hole interior across the horizon. I will show how this semi-causality violation changes the entanglement structure and information recovery during evaporation, using von Neumann entropy, mutual information and entanglement negativity. I will also discuss the residual correlations that remain at late times and their possible implications for the endpoint of black hole evaporation.

ABOUT THE SPEAKER :

Dr. Sourav Ballav completed his PhD at IMSc, Chennai and postdocs in IISER Bhopal, NTU Taiwan and CYCU Taiwan.

MEETING DETAILS :

Speaker: Dr. Sarbajaya Kundu, Postdoctoral Fellow, CYCU TAiwan

Venue: A4 Conf Room South Campus, IIT Mandi

Date and Time: Oct 6, 2026, Tuesday at 11:00 am