期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.100506
关键词
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资金
- U.S. Army Research Office (ARO) [W911NF0710576]
- DARPA Optical Lattice Emulator Program
- IARPA MQCO Program
- NSF Physics Frontier Center at JQI
- ARO [W911NF0410234]
- Direct For Mathematical & Physical Scien
- Division Of Physics [822671] Funding Source: National Science Foundation
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. Because of 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.
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