Quantum Catalysis of Magnetic Phase Transitions in a Quantum Simulator

TitleQuantum Catalysis of Magnetic Phase Transitions in a Quantum Simulator
Publication TypeJournal Article
Year of Publication2013
AuthorsRicherme, P, Senko, C, Korenblit, S, Smith, J, Lee, A, Islam, R, Campbell, WC, Monroe, C
JournalPhysical Review Letters
Date Published2013/9/5

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.

Short TitlePhys. Rev. Lett.