Long-range and frustrated spin-spin interactions in crystals of cold polar molecules

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.052332· OSTI ID:22093501

Zhou, Y. L. ^[1]; Ortner, M. ^[2]; Rabl, P. ^[3]

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1. College of Science, National University of Defense Technology, Changsha, 410073 (China)
2. Institute for Theoretical Physics, University of Innsbruck, AT-6020 Innsbruck (Austria)
3. Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, AT-6020 Innsbruck (Austria)

We describe a simple scheme for the implementation and control of effective spin-spin interactions in self-assembled crystals of cold polar molecules. In our scheme, spin states are encoded in two long-lived rotational states of the molecules and coupled via state-dependent dipole-dipole forces to the lattice vibrations. We show that, by choosing an appropriate time-dependent modulation of the induced dipole moments, the resulting phonon-mediated interactions compete with the direct dipole-dipole coupling and lead to long-range and tunable spin-spin interaction patterns. We illustrate how this technique can be used for the generation of multiparticle entangled spin states and the implementation of spin models with long-range and frustrated interactions, which exhibit nontrivial phases of magnetic ordering.

• OSTI ID: 22093501
• Journal Information: Physical Review. A, Vol. 84, Issue 5; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
CRYSTALS
DIPOLE MOMENTS
DIPOLES
INTERACTION RANGE
J-J COUPLING
LATTICE VIBRATIONS
MAGNETIZATION
MODULATION
MOLECULES
PHONONS
QUANTUM ENTANGLEMENT
ROTATIONAL STATES
SPIN
TIME DEPENDENCE