Fermion bag approach to Hamiltonian lattice field theories in continuous time

作     者：Emilie Huffman Shailesh Chandrasekharan 

作者机构：Duke University Durham North Carolina 27708 USA 

出 版 物：《Physical Review D》 (Phy. Rev. D)

年 卷 期：2017年第96卷第11期

页      面：114502-114502页

核心收录：

基　　金：National Science Foundation, NSF U.S. Department of Energy, USDOE Office of Science, SC, (DE-FG02-05ER41368) National Physical Science Consortium, NPSC National Science Foundation, NSF 

主　　题：Lattice field theory Many-body techniques Metropolis algorithm 

摘      要：We extend the idea of fermion bags to Hamiltonian lattice field theories in the continuous time formulation. Using a class of models we argue that the temperature is a parameter that splits the fermion dynamics into small spatial regions that can be used to identify fermion bags. Using this idea we construct a continuous time quantum Monte Carlo algorithm and compute critical exponents in the 3d Ising Gross-Neveu universality class using a single flavor of massless Hamiltonian staggered fermions. We find η=0.54(6) and ν=0.88(2) using lattices up to N=2304 sites. We argue that even sizes up to N=10,000 sites should be accessible with supercomputers available today.