Evidence for Multimodal Superfluidity of Neutrons
- URL: http://arxiv.org/abs/2602.17611v2
- Date: Wed, 04 Mar 2026 18:59:27 GMT
- Title: Evidence for Multimodal Superfluidity of Neutrons
- Abstract summary: We show that the condensate consists of coexisting s-wave pairs, p-wave pairs in entangled double pair combinations, and quartets composed of bound states of two s-wave pairs.<n>We identify multimodal superfluidity as a general feature of single-flavor spin-1/2 fermionic systems with attractive s-wave and p-wave interactions.
- Score: 33.960965008651684
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We present theoretical and experimental evidence for a new phase of matter in neutron-rich systems that we call multimodal superfluidity. Using ab initio lattice calculations, we show that the condensate consists of coexisting s-wave pairs, p-wave pairs in entangled double pair combinations, and quartets composed of bound states of two s-wave pairs. We identify multimodal superfluidity as a general feature of single-flavor spin-1/2 fermionic systems with attractive s-wave and p-wave interactions, provided the system is stable against collapse into a dense droplet. Beyond neutrons at sub-saturation densities, we demonstrate that this phase appears in generalized attractive extended Hubbard models in one, two, and three dimensions. We elucidate the mechanism for this coexistence using self-consistent few-body Cooper models and compare with Bardeen-Cooper-Schrieffer theory. We also derive the form of the effective action and show that spin, rotational, and parity symmetries remain unbroken. Finally, we analyze experimental data to show that p-wave pair gaps and quartet gaps are present in atomic nuclei, and we discuss the consequences of this new phase for the structure and dynamics of neutron star crusts.
Related papers
- Emergent Kitaev materials in synthetic Fermi-Hubbard bilayers [45.88028371034407]
Bond-directional spin-spin interactions in a Fermi-Hubbard bilayer can be realized with ultracold fermions in Raman optical lattices.<n>We analyze the Fermi-liquid and Mott-insulating phases, highlighting a correspondence between Dirac and Majorana quasi-particles.<n>Our results establish that cold-atom quantum simulators based on Raman optical lattices can be a playground for extended Kitaev models.
arXiv Detail & Related papers (2025-04-22T10:07:56Z) - Experimental Observation of Single- and Multi-Site Matter-Wave Solitons in 1D Optical Lattices [0.0]
We report the experimental observation of discrete bright matter-wave solitons with attractive interaction in an optical lattice.<n>Results reveal the existence and characteristics of these solitons across a range of lattice depths and spacings.
arXiv Detail & Related papers (2025-04-15T10:17:12Z) - Bardeen-Cooper-Schrieffer interaction as an infinite-range Penson-Kolb pairing mechanism [0.0]
We show that the well-known $(kuparrow, -kdownarrow)$ Bardeen-Cooper-Schrieffer interaction, when considered in real space, is equivalent to an infinite-range Penson-Kolb pairing mechanism.
We investigate the dynamics of fermionic particles confined in a ring-shaped lattice.
arXiv Detail & Related papers (2024-01-30T10:29:46Z) - Feshbach hypothesis of high-Tc superconductivity in cuprates [0.0]
We present a Feshbach perspective on the origin of strong pairing in Fermi-Hubbard type models.
Existing experimental and numerical results on hole-doped cuprates lead us to conjecture the existence of a light, long-lived, low-energy excited state of two holes.
The emergent Feshbach resonance we propose could also underlie superconductivity in other doped antiferromagnetic Mott insulators.
arXiv Detail & Related papers (2023-12-05T18:59:59Z) - Pairing from repulsion in a two-dimensional Fermi gas with soft-core interactions [3.4186533395054566]
We investigate a model many-body system of Fermi gas in two dimensions, where the bare two-body interaction is repulsive and takes the form of a soft-core disk potential.
We obtain the zero temperature phase diagram of this model by numerical functional renormalization group (FRG)
We trace the stabilization and enhancement of $f$- and $h$-wave pairing back to the momentum dependence of the bare interaction.
arXiv Detail & Related papers (2023-09-29T16:08:45Z) - Emergence of non-Abelian SU(2) invariance in Abelian frustrated
fermionic ladders [37.69303106863453]
We consider a system of interacting spinless fermions on a two-leg triangular ladder with $pi/2$ magnetic flux per triangular plaquette.
Microscopically, the system exhibits a U(1) symmetry corresponding to the conservation of total fermionic charge, and a discrete $mathbbZ$ symmetry.
At the intersection of the three phases, the system features a critical point with an emergent SU(2) symmetry.
arXiv Detail & Related papers (2023-05-11T15:57:27Z) - Higher-order topological Peierls insulator in a two-dimensional
atom-cavity system [58.720142291102135]
We show how photon-mediated interactions give rise to a plaquette-ordered bond pattern in the atomic ground state.
The pattern opens a non-trivial topological gap in 2D, resulting in a higher-order topological phase hosting corner states.
Our work shows how atomic quantum simulators can be harnessed to investigate novel strongly-correlated topological phenomena.
arXiv Detail & Related papers (2023-05-05T10:25:14Z) - Spin- and Momentum-Correlated Atom Pairs Mediated by Photon Exchange and
Seeded by Vacuum Fluctuations [0.0]
We experimentally demonstrate a mechanism for generating pairs of atoms in well-defined spin and momentum modes.
We observe a collectively enhanced production of pairs and probe interspin correlations in momentum space.
Our results offer promising prospects for quantum-enhanced interferometry and quantum simulation experiments.
arXiv Detail & Related papers (2023-03-20T17:59:03Z) - Dilute neutron star matter from neural-network quantum states [58.720142291102135]
Low-density neutron matter is characterized by the formation of Cooper pairs and the onset of superfluidity.
We model this density regime by capitalizing on the expressivity of the hidden-nucleon neural-network quantum states combined with variational Monte Carlo and reconfiguration techniques.
arXiv Detail & Related papers (2022-12-08T17:55:25Z) - Multi-band Bose-Einstein condensate at four-particle scattering
resonance [47.187609203210705]
We show that magnon quantization for thin samples results in a new multi-band magnon condensate.
The most stable multi-band condensate is found in a narrow regime favoured on account of a resonance in the scattering between two bands.
arXiv Detail & Related papers (2022-01-26T16:32:58Z) - Light-matter interactions near photonic Weyl points [68.8204255655161]
Weyl photons appear when two three-dimensional photonic bands with linear dispersion are degenerated at a single momentum point, labeled as Weyl point.
We analyze the dynamics of a single quantum emitter coupled to a Weyl photonic bath as a function of its detuning with respect to the Weyl point.
arXiv Detail & Related papers (2020-12-23T18:51:13Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.