Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website; (3) the federal government Internet portal; or (4) a web search conducted using a commercial search engine such as
Accession Number ADA562419
Title Onset of a Quantum Phase Transition with a Trapped Ion Quantum Simulator.
Publication Date Jul 2011
Media Count 7p
Personal Author C. Noh E. E. Edwards K. Kim R. Islam S. Korenblit
Abstract A quantum simulator is a well-controlled quantum system that can follow the evolution of a prescribed model whose behaviour may be difficult to determine. A good example is the simulation of a set of interacting spins, where phase transitions between various spin orders can underlie poorly understood concepts such as spin liquids. Here we simulate the emergence of magnetism by implementing a fully connected non-uniform ferromagnetic quantum Ising model using up to 9 trapped Yb171+ ions. By increasing the Ising coupling strengths compared with the transverse field, the crossover from paramagnetism to ferromagnetic order sharpens as the system is scaled up, prefacing the expected quantum phase transition in the thermodynamic limit. We measure scalable order parameters appropriate for large systems, such as various moments of the magnetization. As the results are theoretically tractable, this work provides a critical benchmark for the simulation of intractable arbitrary fully connected Ising models in larger systems.
Keywords Ions
Magnetic properties
Phase transformations
Quantum simulators
Quantum theory
Trapped ions
Trapping(Charged particles)

Source Agency Non Paid ADAS
NTIS Subject Category 46 - Physics
Corporate Author Michigan Univ., Ann Arbor. Dept. of Physics.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1225
Contract Number 911NF0710576

Science and Technology Highlights

See a sampling of the latest scientific, technical and engineering information from NTIS in the NTIS Technical Reports Newsletter

Acrobat Reader Mobile    Acrobat Reader