TY - GEN AU - Chen,J-S AU - Brewer,S M AU - Chou,C W AU - Wineland,D J AU - Leibrandt,D R AU - Hume,D B TI - Sympathetic Ground State Cooling and Time-Dilation Shifts in an ^{27}Al^{+} Optical Clock SN - 1079-7114 PY - 2018///0205 N1 - Publication Type: Journal Article UR - https://doi.org/10.1103/PhysRevLett.118.053002 ER -