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Friday 06 November 2009, 16:00-16:30
Reptation Quantum Monte Carlo
- đ¤ Speaker: Bohshiang Jong (TCM)
- đ Date & Time: Friday 06 November 2009, 16:00 - 16:30
- đ Venue: TCM Seminar Room, Cavendish Laboratory
Abstract
Reptation Quantum Monte Carlo, S. Baroni, S. Moroni
We present an elementary and self-contained account of the analogies existing between classical diffusion and the imaginary-time evolution of quantum systems. These analogies are used to develop a new quantum simulation method which allows to calculate the ground-state expectation values of local observables without any mixed estimates nor population-control bias, as well as static and dynamic (in imaginary time) response functions. This method, which we name Reptation Quantum Monte Carlo, is demonstrated with a few case applications to 4He, including the calculation of total and potential energies, static and imaginary-time dependent density response functions, and low-lying excitation energies. Finally, we discuss the relations of our technique with other simulation schemes.
Series This talk is part of the TCM Journal Club series.
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