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Published on: August 2, 2019
Zero-temperature phase transitions in dilute bosonic superfluids on a lattice
1Department of Physics, Loughborough University, Loughborough LE11 3TU, UK.
Summary
Kinetic energy drives phase transitions in Bose superfluids at low repulsion. Critical hopping terms alter the condensate
Area of Science:
- Condensed Matter Physics
- Quantum Fluids
Background:
- Bose superfluids exhibit complex phases driven by kinetic energy.
- Hopping terms significantly influence superfluid properties.
Purpose of the Study:
- To investigate kinetic energy driven phase transitions in Bose superfluids.
- To map superfluid phases based on energy dispersion and hopping terms.
- To analyze the impact of repulsive and hopping terms on condensate wavefunction and inhomogeneities.
Main Methods:
- Analysis of single-particle energy dispersion.
- Examination of next-to-nearest and next-to-next-to-nearest hopping terms.
- Study of repulsive interactions and their effect on condensate wavefunction.
Main Results:
- Phase transitions occur at low repulsion with critical hopping terms.
- A new superfluid phase was identified.
- Additional repulsive terms modify the condensate wavefunction.
- Hopping terms influence condensate inhomogeneity formation.
Conclusions:
- Kinetic energy plays a crucial role in Bose superfluid phase transitions.
- The study reveals new phases and the impact of higher-order hopping terms.
- Understanding these effects is key for controlling superfluid properties.
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