Speaker
Yusuke Namekawa
(Hiroshima University)
Description
The sign problem has been an obstacle to first-principles calculations based on the Monte Carlo method. The Worldvolume Hybrid Monte Carlo (WV-HMC) method [Fukuma-Matsumoto 2020] is an efficient method to reduce the sign problem with low cost. In this talk, I apply the WV-HMC to the complex $\phi^4$ theory at finite density, and show that the computational cost is proportional to the degrees of freedom, $N$, in contrast to the $N^3$ scaling for other Lefschetz thimble methods.
| Topical area | QCD at Non-zero Density |
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Primary authors
Masafumi Fukuma
(Kyoto University)
Yusuke Namekawa
(Hiroshima University)