CHISA HOTTA GROUP @ condensed matter theory

Graduate School of Arts and Sciences/ Department of Basic Science , University of Tokyo.
Condensed matter theory

Chisa Hotta, Professor of Physics (theory)
Address
Meguro-ku Komaba 3-8-1, Tokyo 153-8902, JPN.
University of Tokyo, Komaba campus

google map: 35.661459, 139.683015
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Research Summary
Our research lies at the interface of material science, statistical physics, and numerical physics with a particular emphasis on the quantum many-body phases of matter. What attracts us much about these systems is how the quantum phases are formed naturally in realistic materials, and how they develop their internal structure for what reason? Solving these issues individually provides us with a rich and systematic view of how to see the world.
For the past years, we worked on various range of topics including quantum magnetism, electronic flat band physics, quantum and classical Ising models, statistical physics problems like finite-temperature pure and mixed states and glass/disorder physics, etc. We have also developed several numerical techniques to attack these difficult problems, which turned out to work well in reaching accurate descriptions of the quantum many-body states that sometimes suffer difficulty stemming from a volume-law or long-range entangled properties. Working with experimentalists on real materials is also important to have good inspirations: one-dimensional chains (dimpy, YbCuS₂), two-dimensional frustrated lattices (kagome materials, organic kappa-ET conductors) and in three dimensional pyrochlore lattices (e.g. CsW₂O₆, Y₂Mo₂O₇). Some of them are the platforms of strong spin-orbit coupled physics realized in 3d, 4d, 5d, and 4f electron systems and related exotic magnetism.

♢ Frustrated magnetism/quantum magnetism
♢ Electronic ferroelectricity
♢ Organic conducting materials
♢ Disordered systems/glasses
♢ Statistical physics, thermal states, quantum and classical dynamics
♢ Quantum entanglement and many body physics
♢ Matrix product states (MPS) and developing related numerical methods
For details, see the following contents which give some brief introduction to our recent activities.