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Title: Quantum magnetism with polar alkali-metal dimers

Abstract

We show that dipolar interactions between ultracold polar alkali-metal dimers in optical lattices can be used to realize a highly tunable generalization of the t-J model, which we refer to as the t-J-V-W model. The model features long-range spin-spin interactions J{sub z} and J{sub perpendicular} of XXZ type, long-range density-density interaction V, and long-range density-spin interaction W, all of which can be controlled in both magnitude and sign independently of each other and of the tunneling t. The spin's is encoded in the rotational degree of freedom of the molecules, while the interactions are controlled by applied static electric and continuous-wave microwave fields. Furthermore, we show that nuclear spins of the molecules can be used to implement an additional (orbital) degree of freedom that is coupled to the original rotational degree of freedom in a tunable way. The presented system is expected to exhibit exotic physics and to provide insights into strongly correlated phenomena in condensed-matter systems. Realistic experimental imperfections are discussed.

Authors:
 [1];  [2]; ;  [3]; ;  [4];  [2];  [3];  [2]
  1. Institute for Quantum Information, California Institute of Technology, Pasadena, California 91125 (United States)
  2. (United States)
  3. JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440 and Department of Physics, University of Colorado, Boulder, Colorado 80309-0390 (United States)
  4. Physics Department, Harvard University, Cambridge, Massachusetts 02138 (United States)
Publication Date:
OSTI Identifier:
22068764
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALKALI METALS; DEFECTS; DEGREES OF FREEDOM; DENSITY; DIMERS; INTERACTIONS; J-J COUPLING; MAGNETISM; MATTER; MICROWAVE RADIATION; MOLECULES; SPIN; TUNNEL EFFECT

Citation Formats

Gorshkov, Alexey V., Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, Manmana, Salvatore R., Chen Gang, Demler, Eugene, Lukin, Mikhail D., Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, Rey, Ana Maria, and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106. Quantum magnetism with polar alkali-metal dimers. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.033619.
Gorshkov, Alexey V., Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, Manmana, Salvatore R., Chen Gang, Demler, Eugene, Lukin, Mikhail D., Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, Rey, Ana Maria, & Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106. Quantum magnetism with polar alkali-metal dimers. United States. doi:10.1103/PHYSREVA.84.033619.
Gorshkov, Alexey V., Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, Manmana, Salvatore R., Chen Gang, Demler, Eugene, Lukin, Mikhail D., Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, Rey, Ana Maria, and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106. Thu . "Quantum magnetism with polar alkali-metal dimers". United States. doi:10.1103/PHYSREVA.84.033619.
@article{osti_22068764,
title = {Quantum magnetism with polar alkali-metal dimers},
author = {Gorshkov, Alexey V. and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 and Manmana, Salvatore R. and Chen Gang and Demler, Eugene and Lukin, Mikhail D. and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106 and Rey, Ana Maria and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106},
abstractNote = {We show that dipolar interactions between ultracold polar alkali-metal dimers in optical lattices can be used to realize a highly tunable generalization of the t-J model, which we refer to as the t-J-V-W model. The model features long-range spin-spin interactions J{sub z} and J{sub perpendicular} of XXZ type, long-range density-density interaction V, and long-range density-spin interaction W, all of which can be controlled in both magnitude and sign independently of each other and of the tunneling t. The spin's is encoded in the rotational degree of freedom of the molecules, while the interactions are controlled by applied static electric and continuous-wave microwave fields. Furthermore, we show that nuclear spins of the molecules can be used to implement an additional (orbital) degree of freedom that is coupled to the original rotational degree of freedom in a tunable way. The presented system is expected to exhibit exotic physics and to provide insights into strongly correlated phenomena in condensed-matter systems. Realistic experimental imperfections are discussed.},
doi = {10.1103/PHYSREVA.84.033619},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}