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Unitary p-wave interactions between fermions in an optical lattice
Vijin Venu1, Peihang Xu1, Mikhail Mamaev2,3
1Department of Physics and CQIQC, University of Toronto, Toronto, Ontario, Canada.
Nature
|January 11, 2023
Summary
Researchers created isolated fermionic atom pairs in an optical lattice, enabling tunable p-wave interactions crucial for quantum simulations and topological quantum gates. This overcomes limitations of three-body loss, paving the way for new quantum states.
Area of Science:
- Quantum physics
- Ultracold atomic gases
- Condensed matter physics
Background:
- Antisymmetric pair wavefunctions are key to unconventional superconductors and superfluids.
- Weak natural antisymmetric interactions and three-body loss limit their study in ultracold systems.
Purpose of the Study:
- To create and study isolated, tunable p-wave interactions in fermionic systems.
- To overcome limitations of three-body loss for observing exotic quantum states.
Main Methods:
- Utilized a multiorbital three-dimensional optical lattice to isolate spin-polarized fermionic atom pairs.
- Employed magnetic Feshbach resonance to tune p-wave interaction strengths.
- Spectroscopically measured elastic p-wave interaction energies.
Main Results:
- Achieved widely tunable, on-site p-wave interactions for fermionic atom pairs.
- Observed elastic unitary p-wave interactions and coherent oscillations, free from three-body loss.
- Demonstrated universal scaling of interaction strengths with lattice parameters.
Conclusions:
- Provides a controllable platform for studying p-wave interactions in fermionic systems.
- Essential for assembling multiorbital lattice models for quantum simulations.
- Offers a starting point for protecting quantum systems from three-body recombination.
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