Related papers: Particle zoo in a doped spin chain: Correlated states of mesons and magnons

Particle zoo in a doped spin chain: Correlated states of mesons and magnons

URL: http://arxiv.org/abs/2210.02320v1
Date: Wed, 5 Oct 2022 15:20:16 GMT
Title: Particle zoo in a doped spin chain: Correlated states of mesons and magnons
Authors: Petar \v{C}ubela and Annabelle Bohrdt and Markus Greiner and Fabian Grusdt
Abstract summary: We study a doped one-dimensional spin chain in a staggered magnetic field and demonstrate that it supports a zoo of long-lived excitations. We introduce a strong-coupling theory describing the polaronic dressing and molecular binding of mesons to collective magnon excitations. Experimentally, the doped spin-chain in a staggered field can be directly realized in quantum gas microscopes.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: It is a widely accepted view that the interplay of spin- and charge-degrees of freedom in doped antiferromagnets (AFMs) gives rise to the rich physics of high-temperature superconductors. Nevertheless, it remains unclear how effective low-energy degrees of freedom and the corresponding field theories emerge from microscopic models, including the $t-J$ and Hubbard Hamiltonians. A promising view comprises that the charge carriers have a rich internal parton structure on intermediate scales, but the interplay of the emergent partons with collective magnon excitations of the surrounding AFM remains unexplored. Here we study a doped one-dimensional spin chain in a staggered magnetic field and demonstrate that it supports a zoo of various long-lived excitations. These include magnons; mesonic pairs of spinons and chargons, along with their ro-vibrational excitations; and tetra-parton bound states of mesons and magnons. We identify these types of quasiparticles in various spectra using DMRG simulations. Moreover, we introduce a strong-coupling theory describing the polaronic dressing and molecular binding of mesons to collective magnon excitations. The effective theory can be solved by standard tools developed for polaronic problems, and can be extended to study similar physics in two-dimensional doped AFMs in the future. Experimentally, the doped spin-chain in a staggered field can be directly realized in quantum gas microscopes.

Related papers

Quantum Sensing of Antiferromagnetic Magnon Two-Mode Squeezed Vacuum [0.0]
N'eel ordered antiferromagnets exhibit two-mode squeezing such that their ground state is a nonclassical superposition of magnon Fock states. We show that this kind of coupling induces a magnon number dependent level splitting of the excited state resulting in multiple system excitation energies.
arXiv Detail & Related papers (2024-02-20T18:12:59Z)
Cavity magnonics with domain walls in insulating ferromagnetic wires [0.0]
Magnetic domain walls (DWs) are topological defects that exhibit robust low-energy modes that can be harnessed for classical and neuromorphic computing. We show how to exploit a geometric Berry-phase interaction between the localized DWs and the extended magnons in short ferromagnetic insulating wires. We demonstrate that magnons can mediate long-range entangling interactions between qubits stored in distant DWs, which could facilitate the implementation of a universal set of quantum gates.
arXiv Detail & Related papers (2024-01-06T08:46:26Z)
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)
Directly imaging spin polarons in a kinetically frustrated Hubbard system [0.0]
Magnetic polarons arise from interplay between kinetic energy of doped charge carriers and superexchange spin interactions. Here we image itinerant spin polarons in a triangular lattice Hubbard system realised with ultracold atoms. In contrast, around a charge dopant we find ferromagnetic correlations, a manifestation of the elusive Nagaoka effect.
arXiv Detail & Related papers (2023-08-24T17:41:07Z)
The strongly driven Fermi polaron [49.81410781350196]
Quasiparticles are emergent excitations of matter that underlie much of our understanding of quantum many-body systems. We take advantage of the clean setting of homogeneous quantum gases and fast radio-frequency control to manipulate Fermi polarons. We measure the decay rate and the quasiparticle residue of the driven polaron from the Rabi oscillations between the two internal states.
arXiv Detail & Related papers (2023-08-10T17:59:51Z)
Fragmented superconductivity in the Hubbard model as solitons in Ginzburg-Landau theory [58.720142291102135]
Superconductivity and charge density waves are observed in close vicinity in strongly correlated materials. We investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary $t$-$tprime$-$U$ Hubbard model. We provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation.
arXiv Detail & Related papers (2023-07-21T18:00:07Z)
Sensing of magnetic field effects in radical-pair reactions using a quantum sensor [50.591267188664666]
Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades. We employ elaborate and realistic models of radical-pairs, considering its coupling to the local spin environment and the sensor. For two model systems, we derive signals of MFE detectable even in the weak coupling regime between radical-pair and NV quantum sensor.
arXiv Detail & Related papers (2022-09-28T12:56:15Z)
Relativistic aspects of orbital and magnetic anisotropies in the chemical bonding and structure of lanthanide molecules [60.17174832243075]
We study the electronic and ro-vibrational states of heavy homonuclear lanthanide Er2 and Tm2 molecules by applying state-of-the-art relativistic methods. We were able to obtain reliable spin-orbit and correlation-induced splittings between the 91 Er2 and 36 Tm2 electronic potentials dissociating to two ground-state atoms.
arXiv Detail & Related papers (2021-07-06T15:34:00Z)
Magnon-magnon entanglement and its detection in a microwave cavity [0.0]
Quantum magnonics is an emerging research field with great potential for applications in quantum information processing. We investigate antiferromagnets in which sublattices with ferromagnetic interactions can have two different magnon modes. We show how this may lead to experimentally detectable bipartite continuous variable magnon-magnon entanglement.
arXiv Detail & Related papers (2021-06-12T20:46:55Z)
Quantum coherent spin-electric control in a molecular nanomagnet at clock transitions [57.50861918173065]
Electrical control of spins at the nanoscale offers architectural advantages in spintronics. Recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising. E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings.
arXiv Detail & Related papers (2020-05-03T09:27:31Z)
Optimal coupling of HoW$_{10}$ molecular magnets to superconducting circuits near spin clock transitions [85.83811987257297]
We study the coupling of pure and magnetically diluted crystals of HoW$_10$ magnetic clusters to microwave superconducting coplanar waveguides. Results show that engineering spin-clock states of molecular systems offers a promising strategy to combine sizeable spin-photon interactions with a sufficient isolation from unwanted magnetic noise sources.
arXiv Detail & Related papers (2019-11-18T11:03:06Z)

This list is automatically generated from the titles and abstracts of the papers in this site.