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“Cooling-quenches” for shifting entropy elsewhere

Event Details

Event Dates: 

Tuesday, June 28, 2016 - 4:00pm

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Mike Zaletel

Speaker Affiliation(s): 

Station Q, Microsoft Research
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Public Seminar

Event Details & Abstract: 

A long standing difficulty in simulating the ground state properties of the quantum many-body problem with cold-atomic systems has been achieving low enough entropy densities. When adiabatic preparation is insufficient, it is natural to use some of the system’s own degrees of freedom as a bath,  shifting entropy into a  subregion of the trap. In general, correctly tuning the parameters of the “bath” requires a detailed understanding of the thermodynamics. I will discuss the feasibility of a scheme which is thermodynamically guaranteed to shift entropy elsewhere: decreasing the magnitude of the effective Hamiltonian in a sub-region. In addition to a detailed study of the thermodynamics  and dynamics of this proposal, I will discuss how such cooling could be achieved for trapped polar molecules and the half-filled fermionic Hubbard model.