arXiv subjects

Karina Jimenez-Garcia

Publications and source records attributed to Karina Jimenez-Garcia.

2 recordsLinked to original sources

arXiv2014

Geometric scaling of Efimov states in a $^{6}\textrm{Li}$-$^{133}\textrm{Cs}$ mixture

In few-body physics, Efimov states are an infinite series of three-body bound states that obey universal discrete scaling symmetry when pairwise interactions are resonantly enhanced. Despite abundant reports of Efimov states in recent cold atom experiments, direct observation of the discrete scaling symmetry remains an elusive goal. Here we report the observation of three consecutive Efimov resonances in a heteronuclear Li-Cs mixture near a broad interspecies Feshbach resonance. The positions of the resonances closely follow a geometric series $1$, $λ$, $λ^2$. The observed scaling constant $λ_{\rm exp} = 4.9(4)$ is in good agreement with the predicted value of 4.88.

cond-mat.quant-gas↗

arXiv2010

A synthetic electric force acting on neutral atoms

Electromagnetism is a simple example of a gauge theory where the underlying potentials -- the vector and scalar potentials -- are defined only up to a gauge choice. The vector potential generates magnetic fields through its spatial variation and electric fields through its time-dependence. We experimentally produce a synthetic gauge field that emerges only at low energy in a rubidium Bose-Einstein condensate: the neutral atoms behave as charged particles do in the presence of a homogeneous effective vector potential. We have generated a synthetic electric field through the time dependence of an effective vector potential, a physical consequence even though the vector potential is spatially uniform.

cond-mat.quant-gas↗