TY - JOUR
T1 - Nonlinear phase dynamics in a driven bosonic josephson junction
AU - Boukobza, Erez
AU - Moore, Michael G.
AU - Cohen, Doron
AU - Vardi, Amichay
PY - 2010/6/15
Y1 - 2010/6/15
N2 - We study the collective dynamics of a driven two-mode Bose-Hubbard model in the Josephson interaction regime. The classical phase space is mixed, with chaotic and regular components, which determine the dynamical nature of the fringe visibility. For a weak off-resonant drive, where the chaotic component is small, the many-body dynamics corresponds to that of a Kapitza pendulum, with the relative phase φ between the condensates playing the role of the pendulum angle. Using a master equation approach we show that the modulation of the intersite potential barrier stabilizes the φ=π "inverted pendulum" coherent state, and protects the fringe visibility.
AB - We study the collective dynamics of a driven two-mode Bose-Hubbard model in the Josephson interaction regime. The classical phase space is mixed, with chaotic and regular components, which determine the dynamical nature of the fringe visibility. For a weak off-resonant drive, where the chaotic component is small, the many-body dynamics corresponds to that of a Kapitza pendulum, with the relative phase φ between the condensates playing the role of the pendulum angle. Using a master equation approach we show that the modulation of the intersite potential barrier stabilizes the φ=π "inverted pendulum" coherent state, and protects the fringe visibility.
UR - https://www.scopus.com/pages/publications/77953707961
U2 - 10.1103/PhysRevLett.104.240402
DO - 10.1103/PhysRevLett.104.240402
M3 - Article
C2 - 20867282
AN - SCOPUS:77953707961
SN - 0031-9007
VL - 104
JO - Physical Review Letters
JF - Physical Review Letters
IS - 24
M1 - 240402
ER -