Phys. Rev. B 77, 020408(R) (2008) [4 pages]Fermi-polaron problem: Diagrammatic Monte Carlo method for divergent sign-alternating series
We use the diagrammatic Monte Carlo approach to solve the problem of a single spin-down fermion resonantly interacting with a Fermi gas of spin-up particles. Our solution is important for understanding the phase diagram and properties of the crossover from the BCS regime to the Bose-Einstein condensate in the strongly imbalanced regime. On the technical side, we develop a generic sign-problem-tolerant method for exact numerical solution of polaron-type models. This is a characteristic example of how Monte Carlo methods can be used to simulate divergent sign-alternating diagrammatic series. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.020408
DOI:
10.1103/PhysRevB.77.020408
PACS:
05.30.Fk, 02.70.Ss, 05.10.Ln
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.