Study at TCU


Name HORIKOSHI Atsushi
Official Title Associate Professor
Affiliation Natural Sciences
Profile I am a theoretical physicist. In graduate school, I majored in elementary particle physics, and after receiving Ph.D. , I worked as a postdoctoral fellow in chemical physics. Since arriving at Tokyo City University, I have been conducting research on dynamical systems, numerical methods, and quantum computers, in addition to chemical physics.
Research Field(Keyword & Summary)
  1. (1) Chemical physics

    Real-time dynamics of finite-temperature quantum many-body systems is difficult to calculate numerically. Path-integral molecular dynamics is a promising method for numerical calculations by mapping a quantum system to a classical system, and I am developing a method to apply it to the calculation of real-time quantum dynamics.

  2. (2) Nambu mechanics

    Nambu mechanics is a generalized Hamiltonian mechanics, introduced by Yoichiro Nambu in 1973, which has various interesting properties. I have found examples of quantum and semiclassical systems described by Nambu mechanics. I am now investigating its properties in detail and developing numerical methods to calculate it.

  3. (3) Quantum computer

    A quantum computer is a new type of computer that works based on the principles of quantum mechanics. It is still in the development stage, but we can run a prototype machine through a free cloud service. In addition to the simulation of quantum systems, I am considering the use of quantum computers as an educational tool for learning quantum mechanics.

Representative Papers
  1. 1. A.Horikoshi, Nambu dynamics and its noncanonical Hamiltonian representation in many degrees of freedom systems, Progress of Theoretical and Experimental Physics, Vol.2021, ptab075 p1-8 (2021).
  2. 2. A.Horikoshi, Hidden Nambu mechanics II: Quantum/semiclassical dynamics, Progress of Theoretical and Experimental Physics, Vol.2019, 123A02 p1-17 (2019).
  3. 3.A.Horikoshi, Y.Kawamura, Hidden Nambu mechanics: A variant formulation of Hamiltonian systems, Progress of Theoretical and Experimental Physics, Vol.2013, No.7, p073A01 p1-20 (2013).
  4. 4.A.Horikoshi, External source method for Kubo-transformed quantum correlation functions, International Journal of Quantum Chemistry, Vol.113, No.3, p326-329 (2013).
  5. 5.A.Horikoshi, A Formulation of the Ring Polymer Molecular Dynamics, Molecular Simulation, Vol. 38, No.5, p389-396 (2012).
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS)
Affiliated academic society (Membership type) The Physical Society of Japan (Regular member)
American Chemical Society (Regular member)
Education Field (Undergraduate level) Chemistry, Programming, Quantum mechanics
Education Field (Graduate level) Theoretical physics, Chemical reaction, Biophysics