Dear Friends,
On Thursday, March 28th, there will be an ITAMP topical lunch discussion.
Tea Room (P-226) @ CfA (60 Garden Street)
Time: 12:00-1:30
As always pizza will be served.
Speaker: Sarah Mostame (Harvard University)
Title: Quantum simulators using superconducting circuits
Abstract:
Quantum simulator is an experimental study of an interesting
quantum system by use of an alternative quantum system in which the
same Hamiltonian is implemented. In this talk, I will present
analog quantum simulators of open system dynamics with a precisely
engineered quantum environment. Open quantum system approaches are
widely used in the description of physical, chemical and biological
systems. One of the famous models of this type is the Holstein model
describing the interaction of an electron on a 1D lattice with one
vibrational mode per lattice site. This model has applications in
quantum chemistry and condensed matter physics, for example, in
photosynthetic complexes, molecular aggregates, polymers, manganites
or superconductivity. Then, a detailed study of the dynamics of
electron-phonon interaction becomes desirable. Although many
analytical and numerical methods have been applied to this problem,
their applicability is often limited either to a particular
investigation, e.g., low-lying excited polaron states or the Green
function, and for a specific parameter regime. We propose an analog
quantum simulator for the dynamical electron-polaron coupling model
and demonstrate that it can be constructed using currently available
technology of superconducting circuits. With such a quantum simulator,
one can do more extensive investigation including exciton transport,
spectral density, absorption spectra and the wide range of parameters. Our
proposed quantum simulator can reproduce the quantum dynamics of a
standard as well as generalized multiple-mode Holstein model.
Looking forward to seeing you there,
Charles Mathy
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