Quantum Institute: Visitor Schedule

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), Diego Dalvit (T-4), Michael Di Rosa (C-PCS), Sebastian Deffner (T-4 & CNLS), Changhyun Ryu (P-21) , Nikolai Sinitsyn (T-4), Rolando Somma (T-4), Christopher Ticknor (T-1), and Wojciech Zurek (T-4).

For more information, or to nominate a speaker, contact Sebastian Deffner.

To add your name to the Quantum Lunch email list, contact Kacy Hopwood.

Thursday October 8, 2015
12:30 PM - 2:00 PM

Speaker: Luis Orozco (JQI and NIST)

Technical Host: Sebastian Deffner

TOPIC: Cavity QED a platform for quantum thermodynamic studies: environment-assisted speed-up

Abstract
Cavity Quantum Electrodynamics (QED) is an open quantum system where its quantum dynamics lend themselves to detailed studies. We measure the quantum speed of the field state evolution in a weakly driven optical Cavity QED system. The system operates in the intermediate regime of cavity QED where the single atom dipole coupling to the mode of the cavity is comparable to the decay rate of the cavity and the spontaneous emission rate. We consider the mode of the electromagnetic field as the quantum system of interest, with a preferential coupling to a tunable environment: the atoms. By changing the number of atoms coupled to the optical cavity mode, we have realized an environment-assisted speed-up: the quantum speed of the state re-population in the optical cavity increases with the coupling strength between the optical cavity mode and this non-Markovian environment (the number of atoms). We find a non-linear relationship between the quantum speed and the number of atoms in the system.

Work performed in collaboration with B. D. Patterson, A. D. Cimmarusti, Z. Yan, L. P. Corcos, P. Solano, and S. Deffner.

The National Science Foundation of the United States, The Natural Science Foundation of China, and the U.S. Department of Energy through a Los Alamos National Laboratory Director's Funded Fellowship have supported this work.