We analyze the ground state properties of a one-dimensional cold atomic system in a lattice, where Rydberg excitations are created by an external laser drive. In the classical limit, the ground state is characterized by a complete devil's staircase for the commensurate solid structures of Rydberg excitations. Using perturbation theory and a mapping onto an effective low-energy Hamiltonian, we find a transition of these commensurate solids into a floating solid with algebraic correlations. For stronger quantum fluctuations the floating solid eventually melts within a second quantum phase transition and the ground state becomes paramagnetic.
Two-stage melting in systems of strongly interacting Rydberg atoms.
Published 2010 in Physical Review Letters
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- Publication year
2010
- Venue
Physical Review Letters
- Publication date
2010-07-13
- Fields of study
Medicine, Physics
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Semantic Scholar, PubMed
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