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Ising deconfinement transition between Feshbach-resonant superfluids
S Ejima1, M J Bhaseen, M Hohenadler
1Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, 17489 Greifswald, Germany.
Physical Review Letters
|January 15, 2011
Summary
We discovered a novel Ising deconfinement transition in one-dimensional superfluids. This unusual transition between distinct superfluids is characterized by critical Ising degrees of freedom.
Area of Science:
- Quantum physics
- Condensed matter physics
- Low-dimensional systems
Background:
- Investigating quantum many-body systems with Feshbach-resonant interactions is crucial for understanding emergent phenomena.
- One-dimensional (1D) systems exhibit unique correlations and phase transitions not seen in higher dimensions.
Purpose of the Study:
- To map the phase diagram of bosons with Feshbach-resonant pairing in a 1D lattice.
- To identify and characterize novel phase transitions in this low-dimensional setting.
Main Methods:
- Utilizing large-scale density matrix renormalization group (DMRG) simulations.
- Employing field theory techniques to analyze atomic and molecular correlations.
Main Results:
- Providing evidence for an Ising deconfinement transition between distinct superfluids.
- Extracting the Ising order parameter and correlation length associated with this transition.
- Using entanglement entropy to pinpoint the transition's location and critical Ising degrees of freedom.
Conclusions:
- The study reveals an unusual superfluid transition driven by Ising deconfinement in 1D.
- Entanglement entropy serves as a powerful tool to identify critical phenomena and degrees of freedom in quantum systems.
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