TY - JOUR
KW - optical lattice clock
AU - Sarah Bromley
AU - S. Kolkowitz
AU - Tobias Bothwell
AU - Dhruv Kedar
AU - Arghavan Safavi-Naini
AU - Michael Wall
AU - C. Salomon
AU - Ana Maria Rey
AU - Jun Ye
AB - Quantum statistics and symmetrization dictate that identical fermions do not interact via\ s-wave collisions. However, in the presence of spin\textendashorbit coupling (SOC), fermions prepared in identical internal states with distinct momenta become distinguishable. The resulting strongly interacting system can exhibit exotic topological and pairing behaviours, many of which are yet to be observed in condensed matter systems. Ultracold atomic gases offer a promising pathway for simulating these rich phenomena, but until recently have been hindered by heating and losses. Here we enter a new regime of many-body interacting SOC in a fermionic optical lattice clock (OLC), where the long-lived electronic clock states mitigate unwanted dissipation. Using clock spectroscopy, we observe the precession of the collective magnetization and the emergence of spin-locking effects arising from an interplay between\ p-wave and SOC-induced exchange interactions. The many-body dynamics are well captured by a collective XXZ spin model, which describes a broad class of condensed matter systems ranging from superconductors to quantum magnets. Furthermore, our work will aid in the design of next-generation OLCs by offering a route for avoiding the observed large density shifts caused by SOC-induced exchange interactions.
BT - Nature Physics
DA - 2018-02
DO - 10.1038/s41567-017-0029-0
N2 - Quantum statistics and symmetrization dictate that identical fermions do not interact via\ s-wave collisions. However, in the presence of spin\textendashorbit coupling (SOC), fermions prepared in identical internal states with distinct momenta become distinguishable. The resulting strongly interacting system can exhibit exotic topological and pairing behaviours, many of which are yet to be observed in condensed matter systems. Ultracold atomic gases offer a promising pathway for simulating these rich phenomena, but until recently have been hindered by heating and losses. Here we enter a new regime of many-body interacting SOC in a fermionic optical lattice clock (OLC), where the long-lived electronic clock states mitigate unwanted dissipation. Using clock spectroscopy, we observe the precession of the collective magnetization and the emergence of spin-locking effects arising from an interplay between\ p-wave and SOC-induced exchange interactions. The many-body dynamics are well captured by a collective XXZ spin model, which describes a broad class of condensed matter systems ranging from superconductors to quantum magnets. Furthermore, our work will aid in the design of next-generation OLCs by offering a route for avoiding the observed large density shifts caused by SOC-induced exchange interactions.
PY - 2018
EP - 399–404
T2 - Nature Physics
TI - Dynamics of interacting fermions under spin-orbit coupling in an optical lattice clock
UR - https://www.nature.com/articles/s41567-017-0029-0$\#$Abs1
VL - 14
SN - 1745-2473
ER -