Photon-induced Self Trapping and Entanglement of a Bosonic Josephson Junction Inside an Optical Resonator
arXiv:1509.02858 · doi:10.1103/PhysRevA.92.063604
Abstract
We study the influence of photons on the dynamics and the ground state of the atoms in a Bosonic Josephson junction inside an optical resonator. The system is engineered in such a way that the atomic tunneling can be tuned by changing the number of photons in the cavity. In this setup the cavity photons are a new means of control, which can be utilized both in inducing self-trapping solutions and in driving the crossover of the ground state from an atomic coherent state to a Schrödinger's cat state. This is achieved, for suitable setup configurations, with interatomic interactions weaker than those required in the absence of cavity. This is corroborated by the study of the entanglement entropy. In the presence of a laser, this quantum indicator attains its maximum value (which marks the formation of the cat-like state and, at a semiclassical level, the onset of self-trapping) for attractions smaller than those of the bare junction.
5 pages
References in corpus (13)
- Cold atoms in cavity-generated dynamical optical potentials
- Matter-wave interferometry in a double well on an atom chip
- Strong atom-field coupling for Bose-Einstein condensates in an optical cavity on a chip
- Cavity QED with a Bose-Einstein condensate
- Ultracold atoms in optical lattices generated by quantized light fields
- Number squeezing, quantum fluctuations and oscillations in mesoscopic Bose Josephson junctions
- Cavity-QED with cold atoms trapped in a double-well potential
- Robust Mesoscopic Superposition of Strongly Correlated Ultracold Atoms
- Bose-Einstein Condensates on slightly asymmetric double-well potentials
- Tunneling dynamics of bosonic Josephson junctions assisted by a cavity field
- Reproducible mesoscopic superpositions of Bose-Einstein condensates and mean-field chaos
- Cavity-aided quantum parameter estimation in a bosonic double-well Josephson junction
- The effect of a laser dip in the semiclassical dynamics of bosonic Josephson Junctions