Accession Number : ADA609678


Title :   Nonequilibrium Dynamics of Arbitrary-Range Ising Models with Decoherence: An Exact Analytic Solution


Descriptive Note : Journal article


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE OFFICE OF SPONSORED RESEARCH


Personal Author(s) : Foss-Feig, Michael ; Hazzard, Kaden R ; Bollinger, John J ; Rey, Ana M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a609678.pdf


Report Date : 03 Apr 2013


Pagination or Media Count : 11


Abstract : The interplay between interactions and decoherence in many-body systems is of fundamental importance in quantum physics. In a step toward understanding this interplay, we obtain an exact analytic solution for the nonequilibrium dynamics of Ising models with arbitrary couplings (and therefore in arbitrary dimension) and subject to local Markovian decoherence. Our solution shows that decoherence significantly degrades the nonclassical correlations developed during coherent Ising spin dynamics, which relax much faster than predicted by treating decoherence and interactions separately. We also show that the competition of decoherence and interactions induces a transition from oscillatory to overdamped dynamics that is absent at the single-particle or mean-field level. These calculations are applicable to ongoing quantum information and emulation efforts using a variety of atomic, molecular, optical, and solid-state systems. In particular, we apply our results to the NIST Penning trapped-ion experiment and show that the current experiment is capable of producing entanglement amongst hundreds of quantum spins.


Descriptors :   *QUANTUM THEORY , INTERACTIONS


Subject Categories : Quantum Theory and Relativity


Distribution Statement : APPROVED FOR PUBLIC RELEASE