Coherent population trapping with controlled interparticle interactions.
We investigate coherent population trapping in a strongly interacting ultracold Rydberg gas. Despite the strong van der Waals interactions and interparticle correlations, we observe the persistence of a resonance with subnatural linewidth at the single-particle resonance frequency as we tune the interaction strength. This narrow resonance cannot be understood within a mean-field description of the strong Rydberg-Rydberg interactions. Instead, a many-body density matrix approach, accounting for the dynamics of interparticle correlations, is shown to reproduce the observed spectral features.
Schempp
H
H
Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany.
Günter
G
G
Hofmann
C S
CS
Giese
C
C
Saliba
S D
SD
Depaola
B D
BD
Amthor
T
T
Weidemüller
M
M
Sevinçli
S
S
Pohl
T
T