Pump probe spectroscopy as linear process away from equilibrium

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SUMMARY

This discussion focuses on generating theoretical pump probe spectroscopy data using third order time-dependent perturbation theory and phase matching approximations. The author proposes an alternative approach by analyzing the system's state after the first strong pump pulse, transitioning from equilibrium to a non-equilibrium state, $\rho_{eq} \to \rho_{neq}(t)$. While acknowledging potential issues with system evolution during probe interaction, the author seeks recommendations for relevant papers or textbooks, specifically mentioning Prof. Wolfgang Domcke's contributions to the field.

PREREQUISITES
  • Understanding of third order time-dependent perturbation theory
  • Familiarity with phase matching approximations in spectroscopy
  • Knowledge of linear absorption processes in non-equilibrium systems
  • Basic concepts of pump probe spectroscopy
NEXT STEPS
  • Research Prof. Wolfgang Domcke's publications on pump probe spectroscopy
  • Explore advanced textbooks on time-dependent perturbation theory
  • Investigate the dynamics of excited states in non-equilibrium systems
  • Review articles on linear absorption in spectroscopy for further insights
USEFUL FOR

Researchers and students in the field of spectroscopy, particularly those focusing on pump probe techniques and non-equilibrium dynamics, will benefit from this discussion.

qu_bio
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Greetings everyone,

I have recently been trying to generate some theoretical pump probe spectroscopy data. The typical way to do this is via third order time dependent perturbation theory and applying phase matching approximations / Rotating wave approx etc etc.

There is however, no reason one cannot simply consider the state of the system after interacting with the first (strong) pump pulse and then looking at linear absorption in the non-equilibrium system $\rho_{eq} \to \rho_{neq}(t)$.
Naturally this has a few issues with the system actually evolving while the probe is interacting, but this pulse is considered short so it isn't a problem.

I was wondering if anyone can suggest any papers / textbooks that work through this formalism for absorption spectroscopy?
 
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That seems to be what I was looking for, many thanks.
 

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