Time Propagation and Spectroscopy of Fermionic Systems Using a Stochastic 
Technique

Guther, K.; Dobrautz, W.; Gunnarsson, O.; Alavi, A.

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Time Propagation and Spectroscopy of Fermionic Systems Using a Stochastic Technique

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Gunnarsson, O.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;
Department Electronic Structure Theory (Ali Alavi), Max Planck Institute for Solid State Research, Max Planck Society;

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Alavi, A.
Department Electronic Structure Theory (Ali Alavi), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Guther, K., Dobrautz, W., Gunnarsson, O., & Alavi, A. (2018). Time Propagation and Spectroscopy of Fermionic Systems Using a Stochastic Technique. Physical Review Letters, 121(5): 056401.

Cite as: https://hdl.handle.net/21.11116/0000-000E-D380-2

Abstract

We present a stochastic method for solving the time-dependent Schrodinger equation, generalizing a ground state full configuration interaction quantum Monte Carlo method. By performing the time integration in the complex plane close to the real-time axis, the numerical effort is kept manageable and the analytic continuation to real frequencies is efficient. This allows us to perform ab initio calculation of electron spectra for strongly correlated systems. The method can be used as a cluster solver for embedding schemes.