TY - JOUR
T1 - Quantum Catalysis of Magnetic Phase Transitions in a Quantum Simulator
JF - Physical Review Letters
Y1 - 2013
A1 - Philip Richerme
A1 - Crystal Senko
A1 - Simcha Korenblit
A1 - Jacob Smith
A1 - Aaron Lee
A1 - Rajibul Islam
A1 - Wesley C. Campbell
A1 - Christopher Monroe
AB - We control quantum fluctuations to create the ground state magnetic phases of a classical Ising model with a tunable longitudinal magnetic field using a system of 6 to 10 atomic ion spins. Due to the long-range Ising interactions, the various ground state spin configurations are separated by multiple first-order phase transitions, which in our zero temperature system cannot be driven by thermal fluctuations. We instead use a transverse magnetic field as a quantum catalyst to observe the first steps of the complete fractal devil's staircase, which emerges in the thermodynamic limit and can be mapped to a large number of many-body and energy-optimization problems.
VL - 111
UR - http://arxiv.org/abs/1303.6983v2
CP - 10
J1 - Phys. Rev. Lett.
U5 - 10.1103/PhysRevLett.111.100506
ER -
TY - JOUR
T1 - Quantum Simulation of Spin Models on an Arbitrary Lattice with Trapped Ions
JF - New Journal of Physics
Y1 - 2012
A1 - Simcha Korenblit
A1 - Dvir Kafri
A1 - Wess C. Campbell
A1 - Rajibul Islam
A1 - Emily E. Edwards
A1 - Zhe-Xuan Gong
A1 - Guin-Dar Lin
A1 - Luming Duan
A1 - Jungsang Kim
A1 - Kihwan Kim
A1 - Christopher Monroe
AB - A collection of trapped atomic ions represents one of the most attractive platforms for the quantum simulation of interacting spin networks and quantum magnetism. Spin-dependent optical dipole forces applied to an ion crystal create long-range effective spin-spin interactions and allow the simulation of spin Hamiltonians that possess nontrivial phases and dynamics. Here we show how appropriate design of laser fields can provide for arbitrary multidimensional spin-spin interaction graphs even for the case of a linear spatial array of ions. This scheme uses currently existing trap technology and is scalable to levels where classical methods of simulation are intractable.
VL - 14
U4 - 095024
UR - http://arxiv.org/abs/1201.0776v1
CP - 9
J1 - New J. Phys.
U5 - 10.1088/1367-2630/14/9/095024
ER -