NITheP Seminar: Dissipative Preparation of Phase and Number Squeezed States with Ultracold Atoms

NITheP Seminar: Dissipative Preparation of Phase and Number Squeezed States with Ultracold Atoms

Dr. Roland Cristopher F. Caballar(NITheP & Centre for Quantum Technology, University of KwaZulu-Natal)

NITheP cordially invites you to a seminar by:

Dr. Roland Cristopher F. Caballar

NITheP & Centre for Quantum Technology, University of KwaZulu-Natal

Date: Friday, 2nd August 2013

Time: 14h15 – 15h15

Venue: NITheP Seminar room, H-Block, 3Floor

Title: Dissipative Preparation of Phase and Number Squeezed States with Ultracold Atoms

Abstract:

I present recent work (Caballar, Diehl, Makela and Watanabe, in progress) on the development of a dissipative quantum state preparation scheme for phase- and number-squeezed states. This scheme uses a double-well configuration of an ultracold atom gas immersed in a background BEC, which acts as a dissipative reservoir of excitations. The atoms are excited from the ground state to higher energy states, then dissipatively decay back to the ground state by emitting excitations into the BEC. This process results in the ultracold atom gas being driven towards a phase- or number-squeezed state irrespective of the initial state of the gas. We present a derivation of the master equation for this scheme, and examine its physical properties. Finally, we identify a parameter regime for bosonic rubidium which demonstrates the experimental feasibility of this dissipative state preparation with current technology.