Related papers: Tunable anyonic permeability across ${\mathbb{Z}

Tunable anyonic permeability across ${\mathbb{Z}_2}$ spin liquid junctions

URL: http://arxiv.org/abs/2506.17394v1
Date: Fri, 20 Jun 2025 18:00:10 GMT
Title: Tunable anyonic permeability across ${\mathbb{Z}_2}$ spin liquid junctions
Authors: Sayak Bhattacharjee, Soumya Sur, Adhip Agarwala,
Abstract summary: We study the nature of anyonic transport across potential barrier junctions mediated by Zeeman fields.<n>In the first class of junctions, the charges sense effective static potentials and a change in the band mass.<n>While the junction is completely transparent to the electric charge, magnetic charge transmission is allowed only after a critical field strength.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We introduce two classes of junctions in a toric code, a prototypical model of a $\mathbb{Z}_2$ quantum spin liquid, and study the nature of anyonic transport across them mediated by Zeeman fields. In the first class of junctions, termed potential barrier junctions, the charges sense effective static potentials and a change in the band mass. In a particular realization, while the junction is completely transparent to the electric charge, magnetic charge transmission is allowed only after a critical field strength. In the second class of junctions we stitch two toric codes with operators which do not commute at the junction. We show that the anyonic transmission gets tuned by effective pseudospin fluctuations at the junction. Using exact analytical mappings and numerical simulations, we compute charge-specific transmission probabilities. Our work, apart from uncovering the rich physical mechanisms at play in such junctions, can motivate experimental work to engineer defect structures in topologically ordered systems for tunable transport of anyonic particles.

Related papers

Bipartite Fluctuations and Charge Fractionalization in Quantum Wires [0.0]
We introduce a quantum information method for measuring fractional charges in ballistic quantum wires.<n>This reveals the entangled nature of the two counter-propagating fractional charges associated to the same electron in the system.<n>We show how bipartite current fluctuations represent a useful tool to locate quantum phase transitions.
arXiv Detail & Related papers (2025-01-24T11:22:21Z)
Harnessing Chiral Spin States in Molecular Nanomagnets for Quantum Technologies [44.1973928137492]
We show that chiral qubits naturally suppress always-on interactions that can not be switched off in weakly coupled qubits.<n>Our findings establish spin chirality engineering as a promising strategy for mitigating always-on interaction in entangling two chiral qubits in molecular quantum technologies.
arXiv Detail & Related papers (2025-01-21T08:23:12Z)
Transport properties in a two-dimensional Su-Schrieffer-Heeger model in Quantum Hall Regime [12.642007500160142]
We investigate the transport properties of a two-dimensional Su-Schrieffer-Heeger (2D SSH) model in the quantum Hall regime. We observe a transition from a gapped phase to a flat band regime at zero energy by varying the magnetic field. This transition is characterized by the emergence of highly localized states in the bulk or edges.
arXiv Detail & Related papers (2024-09-25T11:45:37Z)
Steady-state dynamics and non-local correlations in thermoelectric Cooper pair splitters [43.62395775086322]
Recent experiments on Cooper pair splitters using superconductor-quantum dot hybrids have embarked on creating entanglement in the solid-state.<n>We present a comprehensive analysis of the fundamental components of the observed transport signal.<n>Our work provides detailed insights into the gate voltage control of the quantum correlations in superconducting-hybrid Cooper pair splitters.
arXiv Detail & Related papers (2024-06-10T06:46:10Z)
Flux-Tunable Regimes and Supersymmetry in Twisted Cuprate Heterostructures [39.58317527488534]
Two Josephson junctions are integrated in a SQuID circuit threaded by a magnetic flux. We show that the flowermon qubit regime is maintained up to a finite critical value of the magnetic field. The interplay between the inherent twisted d-wave nature of the order parameter and the external magnetic flux enables the implementation of different artificial atoms.
arXiv Detail & Related papers (2024-05-06T13:27:19Z)
Probing Site-Resolved Current in Strongly Interacting Superconducting Circuit Lattices [0.0]
Transport measurements are fundamental for understanding condensed matter phenomena, from superconductivity to the fractional quantum Hall effect. Here we demonstrate the measurement of in-situ particle current in a superconducting circuit lattice and apply it to study transport in both coherent and bath-coupled lattices.
arXiv Detail & Related papers (2024-03-18T17:08:04Z)
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)
Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
arXiv Detail & Related papers (2023-05-10T12:59:07Z)
Spin Current Density Functional Theory of the Quantum Spin-Hall Phase [59.50307752165016]
We apply the spin current density functional theory to the quantum spin-Hall phase. We show that the explicit account of spin currents in the electron-electron potential of the SCDFT is key to the appearance of a Dirac cone.
arXiv Detail & Related papers (2022-08-29T20:46:26Z)
Effect of Phonons and Impurities on the Quantum Transport in XXZ Spin-Chains [0.0]
We evaluate the transport process by incorporating a bath of phonons and impurities in order to understand the role played by each of the factors. We show that while the transport in presence of impurities eventually becomes diffusive, the exact details are dependent on the specifics of the interactions and amount of impurities.
arXiv Detail & Related papers (2022-06-22T15:02:34Z)
Understanding the propagation of excitations in quantum spin chains with different kind of interactions [68.8204255655161]
It is shown that the inhomogeneous chains are able to transfer excitations with near perfect fidelity. It is shown that both designed chains have in common a partially ordered spectrum and well localized eigenvectors.
arXiv Detail & Related papers (2021-12-31T15:09:48Z)
Localization Dynamics from Static and Mobile Impurities [3.803244458097104]
We study the superfluid response and localization dynamics from static and mobile impurities. The superfluidity is formed in the rung-Mott phase of a bosonic ladder model. We study the superfluid currents both in the weakly-coupled and strongly-coupled rungs limits for the bosons.
arXiv Detail & Related papers (2021-01-16T10:10:06Z)

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