Cheng Guo's Homepage



Contact Information

Email:
Cheng.Guo@physik.lmu.de

Office Phone:
+49 (0)86  2180 4526
 
Address:
LS von Delft
Theresiensstr. 37
80333 Munich
Germany

Research Project

My PhD project is to use DMRG, which is an accurate and versatile numerical method in computational condensed matter physics, to study the dynamics of dissipative quantum systems. A Dissipative system is a system coupled to an environment which exchanges energy and matter with it. Classical examples are cyclones and life. Quantum effects become important at the nanoscale and sometimes play the key role. Those dissipative system governed by quantum mechanics are called dissipative quantum systems. A very good theoretical understanding of them is not only very important in quantum theory but also will help experimentalists and engineers to devise future nanoscale and quantum based applications.


Conference Talks

  1. DMRG-optimized NRG treatment of sub-ohmic spin-boson model
    21 March 2011, Dallas USA, APS March Meeting

  2. Spectroscopy of a Periodically Driven Qubit Coupled to a Non-Gaussian Bath
    23 March 2010, Regensburg, DPG Tagungen

  3. DMRG study of a quantum impurity model with Landau-Zener time-dependent Hamiltonian
    9 Spetember 2009, Stellenbosch South Africa

  4. Using DMRG to Study Quantum Impurity Models with Time-dependent Hamiltonians
    27 March 2009, Dresden, DPG Tagungen


Publications

  1. Phys. Rev. Lett. 108, 160401 (2012)
    Cheng Guo, Andreas Weichselbaum, Jan von Delft, and Matthias Vojta
    Critical and Strong-Coupling Phases in One- and Two-Bath Spin-Boson Models

  2. Phys. Rev. B 79, 115137 (2009)
    C. Guo, A. Weichselbaum, S. Kehrein, T. Xiang, and J. v. Delft
    Density matrix renormalization group study of a quantum impurity model with Landau-Zener time-dependent Hamiltonian

  3. College Physics, Vol 24, 62 (2005)
    C. Guo
    Thermodynamic Analysis of Solar Sails