Thermometry and refrigeration in a two-component Mott insulator of ultracold atoms

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.051603· OSTI ID:21528556

Weld, David M; Miyake, Hirokazu; Medley, Patrick; Pritchard, David E; Ketterle, Wolfgang ^[1]

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1. MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

Interesting spin Hamiltonians can be realized with ultracold atoms in a two-component Mott insulator (2CMI) [Adv. Phys. 56, 243 (2007); Rev. Mod. Phys. 80, 885 (2008)]. It was recently demonstrated that the application of a magnetic field gradient to the 2CMI enables new techniques of thermometry [Phys. Rev. Lett. 103, 245301 (2009)] and adiabatic cooling [e-print arXiv:1006.4674]. Here we present a theoretical description which provides quantitative analysis of these two techniques. We show that adiabatic reduction of the field gradient is capable of cooling below the Curie or Neel temperature of certain spin-ordered phases.

• OSTI ID: 21528556
• Journal Information: Physical Review. A, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevA.82.051603; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ADIABATIC PROCESSES
ATOMS
COOLING
CURIE POINT
HAMILTONIANS
MAGNETIC FIELDS
NEEL TEMPERATURE
SPIN
TEMPERATURE MEASUREMENT
ANGULAR MOMENTUM
MATHEMATICAL OPERATORS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
QUANTUM OPERATORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE