



@article {1477,
	title = {Hong-Ou-Mandel atom interferometry in tunnel-coupled optical tweezers},
	journal = {Science},
	volume = {345},
	year = {2014},
	month = {2014/06/26},
	pages = {306 - 309},
	abstract = {  The quantum statistics of atoms is typically observed in the behavior of an
ensemble via macroscopic observables. However, quantum statistics modifies the
behavior of even two particles, inducing remarkable consequences that are at
the heart of quantum science. Here we demonstrate near-complete control over
all the internal and external degrees of freedom of two laser-cooled 87Rb atoms
trapped in two optical tweezers. This full controllability allows us to
implement a massive-particle analog of a Hong-Ou-Mandel interferometer where
atom tunneling plays the role of a photon beamsplitter. We use the
interferometer to probe the effect of quantum statistics on the two-atom
dynamics under tunable initial conditions, chosen to adjust the degree of
atomic indistinguishability. Our work thereby establishes laser-cooled atoms in
optical tweezers as a new route to bottom-up engineering of scalable,
low-entropy quantum systems.
},
	doi = {10.1126/science.1250057},
	url = {http://arxiv.org/abs/1312.7182v2},
	author = {A. M. Kaufman and B. J. Lester and C. M. Reynolds and M. L. Wall and Michael Foss-Feig and K. R. A. Hazzard and A. M. Rey and C. A. Regal}
}
@article {1469,
	title = {Heavy fermions in an optical lattice},
	journal = {Physical Review A},
	volume = {82},
	year = {2010},
	month = {2010/11/22},
	abstract = {  We employ a mean-field theory to study ground-state properties and transport
of a two-dimensional gas of ultracold alklaline-earth metal atoms governed by
the Kondo Lattice Hamiltonian plus a parabolic confining potential. In a
homogenous system this mean-field theory is believed to give a qualitatively
correct description of heavy fermion metals and Kondo insulators: it reproduces
the Kondo-like scaling of the quasiparticle mass in the former, and the same
scaling of the excitation gap in the latter. In order to understand
ground-state properties in a trap we extend this mean-field theory via
local-density approximation. We find that the Kondo insulator gap manifests as
a shell structure in the trapped density profile. In addition, a strong
signature of the large Fermi surface expected for heavy fermion systems
survives the confinement, and could be probed in time-of-flight experiments.
From a full self-consistent diagonalization of the mean-field theory we are
able to study dynamics in the trap. We find that the mass enhancement of
quasiparticle excitations in the heavy Fermi liquid phase manifests as slowing
of the dipole oscillations that result from a sudden displacement of the trap
center.
},
	doi = {10.1103/PhysRevA.82.053624},
	url = {http://arxiv.org/abs/1007.5083v1},
	author = {Michael Foss-Feig and Michael Hermele and Victor Gurarie and Ana Maria Rey}
}
