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- Publisher Website: 10.1103/PhysRevX.13.021013
- Scopus: eid_2-s2.0-85153856733
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Article: Emergent s-Wave Interactions between Identical Fermions in Quasi-One-Dimensional Geometries
Title | Emergent s-Wave Interactions between Identical Fermions in Quasi-One-Dimensional Geometries |
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Authors | |
Issue Date | 25-Apr-2023 |
Publisher | American Physical Society |
Citation | Physical Review X, 2023, v. 13, n. 2, p. 1-23 How to Cite? |
Abstract | Orbital degrees of freedom play an essential role in metals, semiconductors, and strongly confined electronic systems. Experiments with ultracold atoms have used highly anisotropic confinement to explore low-dimensional physics, but they typically eliminate orbital degrees of freedom by preparing atoms in the motional ground states of the strongly confined directions. Here, we prepare multiband systems of spin -polarized fermionic potassium (40K) in the quasi-one-dimensional (q1D) regime and quantify the strength of atom-atom correlations using radio-frequency spectroscopy. The activation of orbital degrees of freedom leads to a new phenomenon: a low-energy scattering channel that has even particle-exchange parity along the q1D axis, as if the underlying interactions were s-wave. This emergent exchange symmetry is enabled by orbital singlet wave functions in the strongly confined directions, which also confer high-momentum components to low-energy q1D collisions. We measure both the q1D odd-wave and even-wave "contact" parameters for the first time and compare them to theoretical predictions of one-dimensional many-body models. The strength and spatial symmetry of interactions are tuned by a p-wave Feshbach resonance and by transverse confinement strength. Near resonance, the even-wave contact approaches its theoretical unitary value, whereas the maximum observed odd-wave contact remains several orders of magnitude below its unitary limit. Low-energy scattering channels of multi-orbital systems, such as those found here, may provide new routes for the exploration of universal many-body phenomena. |
Persistent Identifier | http://hdl.handle.net/10722/331823 |
ISSN | 2023 Impact Factor: 11.6 2023 SCImago Journal Rankings: 5.896 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Jackson, KG | - |
dc.contributor.author | Dale, CJ | - |
dc.contributor.author | Maki, J | - |
dc.contributor.author | Xie, KGS | - |
dc.contributor.author | Olsen, B | - |
dc.contributor.author | Ahmed-Braun, DJM | - |
dc.contributor.author | Zhang, SZ | - |
dc.contributor.author | Thywissen, JH | - |
dc.date.accessioned | 2023-09-21T06:59:14Z | - |
dc.date.available | 2023-09-21T06:59:14Z | - |
dc.date.issued | 2023-04-25 | - |
dc.identifier.citation | Physical Review X, 2023, v. 13, n. 2, p. 1-23 | - |
dc.identifier.issn | 2160-3308 | - |
dc.identifier.uri | http://hdl.handle.net/10722/331823 | - |
dc.description.abstract | <p>Orbital degrees of freedom play an essential role in metals, semiconductors, and strongly confined electronic systems. Experiments with ultracold atoms have used highly anisotropic confinement to explore low-dimensional physics, but they typically eliminate orbital degrees of freedom by preparing atoms in the motional ground states of the strongly confined directions. Here, we prepare multiband systems of spin -polarized fermionic potassium (40K) in the quasi-one-dimensional (q1D) regime and quantify the strength of atom-atom correlations using radio-frequency spectroscopy. The activation of orbital degrees of freedom leads to a new phenomenon: a low-energy scattering channel that has even particle-exchange parity along the q1D axis, as if the underlying interactions were s-wave. This emergent exchange symmetry is enabled by orbital singlet wave functions in the strongly confined directions, which also confer high-momentum components to low-energy q1D collisions. We measure both the q1D odd-wave and even-wave "contact" parameters for the first time and compare them to theoretical predictions of one-dimensional many-body models. The strength and spatial symmetry of interactions are tuned by a p-wave Feshbach resonance and by transverse confinement strength. Near resonance, the even-wave contact approaches its theoretical unitary value, whereas the maximum observed odd-wave contact remains several orders of magnitude below its unitary limit. Low-energy scattering channels of multi-orbital systems, such as those found here, may provide new routes for the exploration of universal many-body phenomena.</p> | - |
dc.language | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.ispartof | Physical Review X | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Emergent s-Wave Interactions between Identical Fermions in Quasi-One-Dimensional Geometries | - |
dc.type | Article | - |
dc.identifier.doi | 10.1103/PhysRevX.13.021013 | - |
dc.identifier.scopus | eid_2-s2.0-85153856733 | - |
dc.identifier.volume | 13 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | 1 | - |
dc.identifier.epage | 23 | - |
dc.identifier.eissn | 2160-3308 | - |
dc.identifier.isi | WOS:000980991600001 | - |
dc.publisher.place | COLLEGE PK | - |
dc.identifier.issnl | 2160-3308 | - |