期刊
SCIENCE ADVANCES
卷 5, 期 8, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aax1568
关键词
-
资金
- NSERC
- Air Force Office of Scientific Research [FA9550-13-1-0063, FA9550-18-1-0319]
- (Multidisciplinary University Research Initiative grant MURI)
- Army Research Office [W911NF-15-1-0603, W911NF-16-1-0576, W911NF-19-1-0210]
- Defense Advanced Research Projects Agency (DARPA)
- NSF [PHY1820885]
- JILA-NSF grant [PFC-173400]
- National Institute of Standards and Technology
A proposed paradigm for out-of-equilibrium quantum systems is that an analog of quantum phase transitions exists between parameter regimes of qualitatively distinct time-dependent behavior. Here, we present evidence of such a transition between dynamical phases in a cold-atom quantum simulator of the collective Heisenberg model. Our simulator encodes spin in the hyperfine states of ultracold fermionic potassium. Atoms are pinned in a network of single-particle modes, whose spatial extent emulates the long-range interactions of traditional quantum magnets. We find that below a critical interaction strength, magnetization of an initially polarized fermionic gas decays quickly, while above the transition point, the magnetization becomes long-lived because of an energy gap that protects against dephasing by the inhomogeneous axial field. Our quantum simulation reveals a nonequilibrium transition predicted to exist but not yet directly observed in quenched s-wave superconductors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据