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Classical and quantum liquids induced by quantum fluctuations
- Source :
- Phys. Rev. Lett. 122, 197601 (2019)
- Publication Year :
- 2018
-
Abstract
- Geometrically frustrated interactions may render classical ground-states macroscopically degenerate. The connection between classical and quantum liquids and how the degeneracy is affected by quantum fluctuations is, however, less well understood. We study a simple model of coupled quantum and classical degrees of freedom, the so-called Falicov-Kimball model, on a triangular lattice and away from half-filling. For weak interactions the phase diagram features a charge disordered state down to zero temperature. We provide compelling evidence that this phase is a liquid and show that it is divided by a crossover line that terminates in a quantum critical point. Our results offer a new vantage point to address how quantum liquids can emerge from their classical counterparts.<br />Comment: 5+6 pages, 4+9 figures
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 122, 197601 (2019)
- Publication Type :
- Report
- Accession number :
- edsarx.1810.10582
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.122.197601