ITAMP Topical Lunch Discussion
Date: Thursday, March 10th
Time:
12:00-1:30 pm
Pizza will be served.
Location: B-106 @ Center for Astrophysics (60
Garden Street)
Directions: after entering the lobby of the CfA, turn
right to enter the hallway of the B building. In the
hallway, turn right again, and B-106 is there.
Speaker:
Heqiu Li and Samuel Markson (both ITAMP)
Title (Hequi Li):
Finding spin squeezing in superradiant systems
Abstract: Spin
squeezed states are useful in quantum metrology. The Dicke
model is shown to possess spin squeezed states and exhibits
superradiant behaviour. But the original Dicke model is valid
only when the system size is much smaller than wavelength. Can
we find spin squeezing in a more realistic superradiant system
in its steady state taking account of the dipole-dipole
interaction? Our work suggests that the answer is yes.
Title
(Samuel Markson): Singlet-triplet
electron scattering admixture due to fine- and hyper-fine
interactions in Cs Rydberg molecules
Abstract: In
ultracold Cs Rydberg molecules, a singlet/triplet admixture
comes about due to both spin-orbit (SO) coupling in the
Rydberg atom as well as the hyperfine (HF) coupling in the
ground state atom. In Cs, the Rydberg SO and ground HF
interactions are on par. The interaction between the Rydberg
electron and the ground state atom includes both s-wave and
p-wave scattering components which can cause additional mixing
of electronic Rydberg states in the bound molecules. We apply
the formalism to Rydberg excitations in Cs into p and d
states.
--
Dr. Igor Pikovski
Institute for Theoretical Atomic, Molecular and Optical Physics (ITAMP)
Harvard-Smithsonian Center for Astrophysics
60 Garden St, MS-14; Cambridge, MA 02138, USA
Tel.: +1 (617) 496-7613
e-mail: igor.pikovski@cfa.harvard.edu
www.cfa.harvard.edu/~igor.pikovski/