A topological ladder

The orbital degrees of freedom refer to different shapes of the wave functions with degenerate energies. In recent years, optical lattices engineered by interfering laser beams offer new means to explore interacting fermions with orbital degrees of freedom the symmetries of which differ from those found in traditional solids. We show that the orbital hopping pattern alone …

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 …

Chern Numbers in Time of Flight


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)

Mingzhen Tian’s research interests

Laser atomic spectroscopy, nonlinear and quantum optics, and quantum information science.

Currently focused on rare-earth based solid state quantum memory and quantum computation, which are the important components in developing quantum information science and technology.  The research also include investigation of laser spectroscopic properties of rare-earth ions trapped in inorganic crystal lattice at cryogenic temperature, the coherent and incoherent …

Erhai Zhao’s research interests

Many body physics of ultracold quantum gases

Ultracold gases refer to quantum degenerate gases of atoms (such as Rubidium, Potassium or Lithium) or molecules confined in vacuum by laser beams and cooled down to nano-Kelvin temperatures (one billionth degree above absolute zero). These systems offer well-controlled settings to test and advance our basic understanding of the collective behaviors of …

Karen Sauer’s research interests

The Magnetic Resonance Laboratory (MRL) is directed by Dr. Karen L. Sauer, of the School of Physics, Astronomy, and Compuational Sciences. The research of MRL seeks to understand and exploit spin-dynamics in such systems as nuclear quadrupole resonance and optically pumped atoms. In addition, we conduct research to push the noise in such systems to their fundamental limit, …

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.

Dark and Bright Solitons in strongly Repulsive Bosonic Gases

Unlike weakly interacting BEC, solitons in hard core bosonic gases support both dark and bright solitons .solitary waves.These solitons survive collision and  quantum fluctuations.

“Quantum Dynamics of Solitons in Strongly Interacting Systems on Optical Lattices”, Chester P. Rubbo, Indubala I. Satija, William P. Reinhardt, Radha Balakrishnan,Ana Maria Rey,1 and Salvatore R. Manmana , Phys. Rev. A 85, 053617 (2012)