Quantum Initiative: Quantum Lunch

The Quantum Lunch is regularly held on Thursdays in the Theoretical Division Conference Room, TA-3, Building 123, Room 121.

The organizing committee includes Malcolm Boshier (P-21), Lukasz Cincio (T-4), Diego Dalvit (T-4), Changhyun Ryu (P-21) , Nikolai Sinitsyn (T-4), Rolando Somma (T-4), Yigit Subasi (T-4), Christopher Ticknor (T-1), and Wojciech Zurek (T-4).

For more information, or to nominate a speaker, contact Yigit Subasi or Lukasz Cincio.

To add your name to the Quantum Lunch email list, contact Amanda Martinez.

Please note the non-standard day and location of this specialk Quantum Lunch talk

Tuesday, July 31, 2018
12:30 PM - 2:00 PM
CNLS Conference Room (03-1690)

Speaker: Yogesh N. Joglekar (IUPUI, Indianapolis)

Technical Host: Avadh Saxena

TOPIC: Simulating unitary and non-unitary quantum dynamics (of molecules) using photonics

Abstract
Quantum simulators are a powerful tool for studying, typically, closed quantum systems that are computationally hard. In the first part of my talk, I will present simulations of vibrational dynamics in molecules that were carried out by using a reprogrammable, unitary photonic chip [1]. They include the unitary evolution of up to four vibrational excitations for several four atom molecules. I will then present simulations for non-unitary processes such as dephased energy transport in a peptide bond, and the thermal relaxation in water. Such non-unitary evolutions also arise naturally due to non-Hermitian Hamiltonians. In the second part of my talk, I will present simulations for multi-particle correlations and various metrics of quantum information in two- and three-mode Hamiltonians with parity-time (PT) symmetry, or mode-selective losses. In contrast to the Lindblad formalism, where entropy increases with time, I will show that PT-symmetric (or mode-selective lossy) Hamiltonians give rise to a rich variety of temporal dependences for quantum information.
This work is an ongoing collaboration with University of Bristol. Reference: Nature 557, 660 (2018).