TY - JOUR
T1 - Coulomb bound states of strongly interacting photons
JF - Physical Review Letters
Y1 - 2015
A1 - Mohammad F. Maghrebi
A1 - Michael Gullans
A1 - P. Bienias
A1 - S. Choi
A1 - I. Martin
A1 - O. Firstenberg
A1 - M. D. Lukin
A1 - H. P. Büchler
A1 - Alexey V. Gorshkov
AB - We show that two photons coupled to Rydberg states via electromagnetically induced transparency can interact via an effective Coulomb potential. This interaction gives rise to a continuum of two-body bound states. Within the continuum, metastable bound states are distinguished in analogy with quasi-bound states tunneling through a potential barrier. We find multiple branches of metastable bound states whose energy spectrum is governed by the Coulomb potential, thus obtaining a photonic analogue of the hydrogen atom. Under certain conditions, the wavefunction resembles that of a diatomic molecule in which the two polaritons are separated by a finite "bond length." These states propagate with a negative group velocity in the medium, allowing for a simple preparation and detection scheme, before they slowly decay to pairs of bound Rydberg atoms.
VL - 115
U4 - 123601
UR - http://arxiv.org/abs/1505.03859v1
CP - 12
J1 - Phys. Rev. Lett.
U5 - 10.1103/PhysRevLett.115.123601
ER -