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Effective p-wave Fermi-Fermi Interaction Induced by Bosonic Superfluids
Yongzheng Wu1, Zheng Yan2, Zhi Lin2
1Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai, 200438, China. yzwu15@fudan.edu.cn.
Scientific Reports
|July 4, 2020
Summary
We investigated a 2D Bose-Fermi mixture, finding that interactions induce p-wave fermion interactions and composite fermion pairs in superfluid states.
Area of Science:
- Condensed Matter Physics
- Quantum Many-Body Systems
- Statistical Mechanics
Background:
- Bose-Fermi mixtures are crucial for understanding emergent quantum phenomena.
- Investigating Bose-Hubbard models on lattices reveals rich interaction-driven physics.
- Finite temperature effects are essential for realistic condensed matter studies.
Purpose of the Study:
- To explore the phase diagram of a 2D Bose-Fermi mixture on a square lattice.
- To understand the impact of boson-fermion interactions on system properties.
- To identify novel emergent phenomena like composite fermion pairs.
Main Methods:
- Determinant Quantum Monte Carlo (DQMC) method.
- Weakly interacting regime analysis.
- Finite temperature simulations.
Main Results:
- Determined the boundary of the collapsed state for attractive bosons without interactions.
- Showcased the induction of an effective p-wave interaction between fermions when bosons are in a superfluid state.
- Observed the emergence of composite fermion pairs at low temperatures.
Conclusions:
- Boson-fermion interactions significantly modify the behavior of the 2D Bose-Fermi mixture.
- The study reveals a pathway to novel fermionic correlations via bosonic superfluidity.
- Composite fermion pair formation presents a new avenue for exploring quantum phases.
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