Year: 2025
Type: article
Abstract: Easy-plane quantum magnets are strikingly similar to superconductors, allowing for spin supercurrent and an effective superconducting phase stemming from their U ( 1 ) rotation symmetry around the z axis. We uncover a generalized fractional Josephson effect with a periodicity that increases linearly with system size in one-dimensional spin- 1 / 2 chains at selected anisotropies and phase-fixing boundary fields. The effect combines arbitrary integer periodicities in a single system, exceeding the 4 π and 8 π periodicity of superconducting Josephson effects of Majorana zero modes and other exotic quasiparticles. We reveal a universal energy-phase relation and connect the effect to the recently discovered phantom helices.
Source: Physical Review Research
Authors: Anshuman Tripathi, Felix Gerken, Peter Schmitteckert, Michael Thorwart, Mircea Trif, Thore Posske
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
OpenAlex ID: W4408473359