## Title: Part 1: A theoretical physicist in industrial R&D. Part 2: Monte Carlo correction of an estimated renormalized Hamiltonian by Robert Cordery

**Sep 26, 2016 at 2:00 PM - 3:30 PM**

**Robert Cordery,**Fairfield University

Host: Simon Catterall / contact: Yudaisy Salomon Sargenton, 315-443-5960

Rooms 202/204

(1) How theoretical physics training prepares you for a career in an industrial R&D group - that is not concerned with theoretical physics.

(2) I will present an alternate Monte Carlo Renormalization Group (MCRG) approach based on a guessed renormalized Hamiltonian. A renormalization group transformation maps a site Hamiltonian that describes a system on a small length scale to a renormalized block Hamiltonian that describes the system on a larger length scale. MCRG typically compares correlations of block and site variables rather than directly calculating the block Hamiltonian. In this alternate approach we simulate a system with both block and site variables. The simulation includes the site Hamiltonian, the coupling to the block variables, and subtracts an estimate of the block Hamiltonian. This eliminates both long distance correlations and critical slowing down. The method uses a single transformation. The renormalized Hamiltonian is calculated directly.