Cundy, Nigel and Krieg, Stefan and Lippert, Thomas and Schaefer, Andreas (2009) Topological tunnelling with dynamical overlap fermions. COMPUTER PHYSICS COMMUNICATIONS, 180 (2). pp. 201-208. ISSN 0010-4655,
Full text not available from this repository. (Request a copy)Abstract
Tunnelling between different topological sectors with dynamical chiral fermions is difficult because of a poor mass scaling of the pseudo-fermion estimate of the determinant. For small fermion masses it is virtually impossible using standard methods. However, by projecting out the small Wilson eigenvectors from the overlap operator. and treating the correction determinant exactly, we can significantly increase the rate of topological sector tunnelling and reduce substantially the auto-correlation time. We present and compare a number of different approaches, and advocate a method which allows topological tunnelling even at low mass with little addition to the computational cost. (C) 2008 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HYBRID MONTE-CARLO; GAUGE-THEORIES; LATTICE; ALGORITHM; QUANTUM; Hybrid Monte Carlo; Chiral fermions; Lattice QCD |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Oct 2020 11:14 |
| Last Modified: | 06 Oct 2020 11:14 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29498 |
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