@article{944106,
      recid = {944106},
      author = {Pigneur, Marine,},
      title = {Non-equilibrium dynamics of tunnel-coupled superfluids :  relaxation to a phase-locked equilibrium state in a  one-dimensional Bosonic Josephson Junction /},
      pages = {1 online resource (xx, 187 pages) :},
      note = {Doctoral thesis accepted by Atominstitut TU Wien, Vienna  Austria."},
      abstract = {The relaxation of isolated quantum many-body systems is a  major unsolved problem of modern physics, which is  connected to many fundamental questions. However,  realizations of quantum many-body systems which are both  well isolated from their environment and accessible to  experimental study are scarce. In recent years, the field  has experienced rapid progress, partly attributed to  ultra-cold atoms. This book presents the experimental study  of a relaxation phenomenon occurring in a one-dimensional  Bosonic Josephson Junction. The system consists of two 1D  quasi Bose-Einstein condensates of 87Rb, magnetically  trapped on an atom chip. Using radio-frequency dressing,  the author deforms a single harmonic trap, in which the  atoms are initially condensed, into a double-well potential  and realizes a splitting of the wave function. A large  spatial separation and a tilt of the double-well enable the  preparation of a broad variety of initial states by  precisely adjusting the initial population and relative  phase of the two wave packets, while preserving the phase  coherence. By re-coupling the two wave packets, the author  investigates tunneling regimes such as Josephson (plasma)  oscillations and macroscopic quantum self-trapping. In both  regimes, the tunneling dynamics exhibits a relaxation to a  phase-locked equilibrium state contradicting theoretical  predictions. The experimental results are supported with an  empirical model that allows quantitative discussions  according to various experimental parameters. These results  illustrate how strongly the non-equilibrium dynamics differ  from the equilibrium one, which is well described by  thermodynamics and statistical physics.},
      url = {http://library.usi.edu/record/944106},
      doi = {https://doi.org/10.1007/978-3-030-52844-7},
}