Details
| Original language | English |
|---|---|
| Article number | L021302 |
| Number of pages | 6 |
| Journal | Physical Review A |
| Volume | 110 |
| Issue number | 2 |
| Publication status | Published - 15 Aug 2024 |
Abstract
Ultracold dipolar particles pinned in optical lattices or tweezers provide an excellent platform for the study of the intriguing equilibration dynamics of spin models with dipolar exchange. Starting with an initial state in which spins of opposite orientation are prepared in each of the legs of a ladder lattice, we show that spin relaxation displays an unexpected dependence on interleg distance and dipole orientation. This dependence, stemming from the interplay between intra- and interleg interactions, results in three distinct relaxation regimes: (i) ergodic, characterized by the fast relaxation towards equilibrium of correlated pairs of excitations generated at exponentially fast rates from the initial state; (ii) metastable, in which the state is quasilocalized in the initial state and only decays in exceedingly long timescales, resembling false-vacuum decay; and, surprisingly, (iii) partially relaxed, with coexisting fast partial relaxation and partial quasilocalization. The realization of this intriguing dynamics is at hand in current state-of-the-art experiments in dipolar gases.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 110, No. 2, L021302, 15.08.2024.
Research output: Contribution to journal › Letter › Research › peer review
}
TY - JOUR
T1 - Relaxation in dipolar spin ladders
T2 - From pair production to false-vacuum decay
AU - Domínguez-Castro, Gustavo A.
AU - Bilitewski, Thomas
AU - Wellnitz, David
AU - Rey, Ana Maria
AU - Santos, Luis
N1 - Publisher Copyright: © 2024 American Physical Society.
PY - 2024/8/15
Y1 - 2024/8/15
N2 - Ultracold dipolar particles pinned in optical lattices or tweezers provide an excellent platform for the study of the intriguing equilibration dynamics of spin models with dipolar exchange. Starting with an initial state in which spins of opposite orientation are prepared in each of the legs of a ladder lattice, we show that spin relaxation displays an unexpected dependence on interleg distance and dipole orientation. This dependence, stemming from the interplay between intra- and interleg interactions, results in three distinct relaxation regimes: (i) ergodic, characterized by the fast relaxation towards equilibrium of correlated pairs of excitations generated at exponentially fast rates from the initial state; (ii) metastable, in which the state is quasilocalized in the initial state and only decays in exceedingly long timescales, resembling false-vacuum decay; and, surprisingly, (iii) partially relaxed, with coexisting fast partial relaxation and partial quasilocalization. The realization of this intriguing dynamics is at hand in current state-of-the-art experiments in dipolar gases.
AB - Ultracold dipolar particles pinned in optical lattices or tweezers provide an excellent platform for the study of the intriguing equilibration dynamics of spin models with dipolar exchange. Starting with an initial state in which spins of opposite orientation are prepared in each of the legs of a ladder lattice, we show that spin relaxation displays an unexpected dependence on interleg distance and dipole orientation. This dependence, stemming from the interplay between intra- and interleg interactions, results in three distinct relaxation regimes: (i) ergodic, characterized by the fast relaxation towards equilibrium of correlated pairs of excitations generated at exponentially fast rates from the initial state; (ii) metastable, in which the state is quasilocalized in the initial state and only decays in exceedingly long timescales, resembling false-vacuum decay; and, surprisingly, (iii) partially relaxed, with coexisting fast partial relaxation and partial quasilocalization. The realization of this intriguing dynamics is at hand in current state-of-the-art experiments in dipolar gases.
UR - http://www.scopus.com/inward/record.url?scp=85201884865&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2311.18091
DO - 10.48550/arXiv.2311.18091
M3 - Letter
AN - SCOPUS:85201884865
VL - 110
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 2
M1 - L021302
ER -