Ghosh, S.K.; Greschner, S.; Yadav, U.K.; Mishra, T.; Rizzi, M.; Shenoy, V.B.: Unconventional phases of attractive Fermi gases in synthetic Hall ribbons. In: Physical Review A 95 (2017), Nr. 6, No. 63612. DOI:
https://doi.org/10.1103/PhysRevA.95.063612
Zusammenfassung: |
An innovative way to produce quantum Hall ribbons in a cold atomic system is to use M hyperfine states of atoms in a one-dimensional optical lattice to mimic an additional "synthetic dimension." A notable aspect here is that the SU(M) symmetric interaction between atoms manifests as "infinite ranged" along the synthetic dimension. We study the many-body physics of fermions with SU(M) symmetric attractive interactions in this system using a combination of analytical field theoretic and numerical density-matrix renormalization-group methods. We uncover the rich ground-state phase diagram of the system, including unconventional phases such as squished baryon fluids, shedding light on many-body physics in low dimensions. Remarkably, changing the parameters entails interesting crossovers and transition; e.g., we show that increasing the magnetic field (that produces the Hall effect) converts a "ferrometallic" state at low fields to a "squished baryon superfluid" (with algebraic pairing correlations) at high fields. We also show that this system provides a unique opportunity to study quantum phase separation in a multiflavor ultracold fermionic system. © 2017 American Physical Society.
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Lizenzbestimmungen: |
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2017 |
Schlagwörter (englisch): |
Atoms, Electron gas, Fermions, Ground state, Hadrons, Numerical methods, Optical lattices, Phase separation, Statistical mechanics, Wave functions, Attractive interactions, Density matrix renormalization group methods, Fermionic systems, Ground state phase diagram, Hyperfine state, One dimensional optical lattice, Pairing correlations, Shedding light, Quantum theory
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Fachliche Zuordnung (DDC): |
530 | Physik
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