Untangling Entanglement and Chaos (Meenu Kumari)
- Date: Oct 2, 2018
- Time: 11:30 AM - 01:00 PM (Local Time Germany)
- Speaker: Meenu Kumari, Institute for Quantum Computing (IQC), University of Waterloo, Canada
- Location: Max-Planck-Institut für Quantenoptik
- Room: New Lecture Hall, Room B 0.32
- Host: MPQ, Theory Division
These questions have puzzled physicists for a couple of decades now. We answer these questions in spin systems by analytically establishing a connection between entanglement generation and a measure of delocalization of a quantum state in such systems. While delocalization is a generic feature of quantum chaotic systems, it is more nuanced in regular systems. We explore when the quantum dynamics mimics a localized classical trajectory, and find criteria to quantify Bohr's
correspondence principle in periodically driven spin systems. These criteria are typically violated in a deep quantum regime due to delocalized evolution. Using our criteria, we establish that entanglement is a signature of chaos only in a semiclassical regime. Our work provides a new approach to analyzing quantum chaos and designing systems that can efficiently generate entanglement.