Phase diagram of dipolar Fermi gases


Understanding the quantum phases of interacting fermions is a fundamental, chanllenging problem in many-body physics. Broken symmetry phases, such as spin density wave order in antiferromagnetic metal Chromium, or the p-wave superfluid order in liquid Helium 3, have long been known and well understood. Motivated by recent experiments, we find theoretically that an unconventional spin-density wave phase with p-wave orbital symmetry in ultracold Fermi gases of polar molecules and magnetic atoms. It is a kind of magnetic order formed on bonds connecting the lattice sites, and can be viewed as the particle-hole analog of p-wave superconductivity.

 

Unconventional Spin Density Waves in Dipolar Fermi Gases, S. G. Bhongale, L. Mathey, Shan-Wen Tsai, Charles W. Clark, Erhai Zhao, arXiv:1209.2671

http://arxiv.org/abs/1209.2671

Chern Numbers in Time of Flight

Chernpub

Chern Numbers hiding in time of flight Images”, Erhai Zhao, Noah Bray-Ali, C. Williams, Ian Spielman and Indubala I Satija , Phys Rev A, 84, 2011, 063629 (PDF)

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Ultra-cold fermionic atoms near unitarity

In recent years, atomic physics has opened a new frontier for the exploration of strongly correlated many-body systems. Atoms can be cooled to sub-nanokelvin temperatures, trapped in a small volume and placed in artificial crystalline potentials or electromagnetic fields created by lasers. Furthermore, interactions between atoms can be controlled. This enables simulations of electronic materials with more ideal properties than found in nature, and testing or developing theories of condensed matter in a new environment. Novel forms of quantum matter can also be engineered using ultra-cold atoms.

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Research areas

Condensed matter theory: P.Nikolic, I.Satija, E.Zhao
Condensed matter experiment: K.Vemuru
Atomic, molecular and optical physics experiment: K.Sauer, M.Tian
Materials science: Y.Mishin
High energy physics experiment: P.Rubin

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    Welcome to the Center for Quantum Science. Our site is still being built.

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