Computational

Physics

Physics

Research: Quantum dynamics

Our approach to study the dynamical properties of a quantum system is to solve numerically, and without additional approximations,
the time-dependent Schrödinger equation for the model Hamiltonian.

We are currently working on

- The simulation of electron-spin-resonance (ESR) and nuclear magnetic resonance (NMR) experiments on nanoscale magnets
- Transport properties of graphene
- Quantum dynamics of molecular magnets and diluted magnets
- Quantum annealing
- The simulation of physical realizations of quantum computer hardware
- Fundamental questions of the foundations of statistical physics mainly such as the question how a system of interacting particles dynamically evolves to a stationary state (e.g. thermal equilibrium)

- M.A. Novotny, M. Guerra, H. De Raedt, K. Michielsen, and F. Jin,

"Dynamics of a Single Spin 1/2 Coupled to x- and y-Spin Baths: Algorithm and Results",

Physics Procedia 34, 90 – 99 (2012)

PDF - H. De Raedt, B. Barbara, S. Miyashita, K. Michielsen, S. Bertaina, and S. Gambarelli,

"Quantum simulations and experiments on Rabi oscillations of spin qubits: Intrinsic vs extrinsic damping",

Phys. Rev. B 85, 014408 (2012)

PDF - S. Yuan, R. Roldán, H. De Raedt, and M.I. Katsnelson,

"Optical conductivity of disordered graphene beyond the Dirac cone approximation",

Phys. Rev. B 84, 195418 (2011) - S. Yuan, H. De Raedt, M.I. Katsnelson,

"Electronic Transport in Disordered Bilayer and Trilayer Graphene",

Phys. Rev. B 82, 235409 (2010)

PDF - F. Jin, H. De Raedt, S. Yuan, M.I.
Katsnelson, S. Miyashita, and K. Michielsen,

"Approach to equilbrium in nano-scale systems at finite temperature"

J. Phys. Soc. Jpn. 79, 124005 (2010)

PDF - S. Yuan, M.I. Katsnelson, and H. De Raedt

"Origin of the Canonical Ensemble: Thermalization with Decoherence",

J. Phys. Soc. Jpn. 78, 094003 (2009)

PDF - S. Yuan, M.I. Katsnelson, and H. De Raedt,

"Evolution of a quantum spin system to its ground state: Role of entanglement and interaction symmetry",

Phys. Rev. A 75, 052109 (2007)

PDF - V.V. Dobrovitski, H.A. De Raedt, M.I. Katsnelson, and B.N. Harmon,

"Quantum oscillations without quantum coherence",

Phys. Rev. Lett. 90, 210401 (2003)

PDF - H. De Raedt, S. Miyashita, K. Saito, D. García-Pablos, and N. García,

"Theory of Quantum Tunneling of the Magnetization in Magnetic Particles",

Phys. Rev. B 56, 11761 - 11768 (1997)

PDF

- Magnetization dynamics of nano-scale magnets

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