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- Christoph Bostedt, Heiko Thomas, +5 authors Jan-Michael Rost
- 2010

Fast electrons emitted from xenon clusters in strong femtosecond 90 eV pulses have been measured at the Free-electron Laser in Hamburg (FLASH). Energy absorption occurs mainly through atomic… (More)

- Ionuţ Georgescu, Sandra E Douchand Brown, Vladimir A Mandelshtam
- The Journal of chemical physics
- 2013

In order to address the issue of whether neon liquid in coexistence with its gas phase can be mapped to a quantum Lennard-Jones (LJ) fluid, we perform a series of simulations using Gibbs ensemble… (More)

- Ionuţ Georgescu, Jason T. Deckman, Laura J Fredrickson, Vladimir A Mandelshtam
- The Journal of chemical physics
- 2011

A new method, here called thermal Gaussian molecular dynamics (TGMD), for simulating the dynamics of quantum many-body systems has recently been introduced [I. Georgescu and V. A. Mandelshtam, Phys.… (More)

It is shown that the energy absorption of a rare-gas cluster from a vacuumultraviolet (VUV) pulse can be traced with time-delayed extreme-ultraviolet (XUV) attosecond probe pulses by measuring the… (More)

- Ionuţ Georgescu, Ulf Saalmann, Jan Michael Rost
- Physical review letters
- 2007

A scheme to probe dissipative multielectron motion in time is introduced. In this context attosecond probing enables one to obtain information which is lost at later times and cannot be retrieved by… (More)

- Ionuţ Georgescu, Svetlana Ya. Jitomirskaya, Vladimir A Mandelshtam
- The Journal of chemical physics
- 2013

Given a quantum many-body system, the Self-Consistent Phonons (SCP) method provides an optimal harmonic approximation by minimizing the free energy. In particular, the SCP estimate for the… (More)

- Ionuţ Georgescu, Vladimir A Mandelshtam
- The Journal of chemical physics
- 2011

The variational Gaussian wavepacket (VGW) approximation provides an alternative to path integral Monte Carlo for the computation of thermodynamic properties of many-body systems at thermal… (More)

- Ionuţ Georgescu, Vladimir A Mandelshtam
- The Journal of chemical physics
- 2012

The theory of self-consistent phonons (SCP) was originally developed to address the anharmonic effects in condensed matter systems. The method seeks a harmonic, temperature-dependent Hamiltonian that… (More)

- Sandra E Douchand Brown, Ionuţ Georgescu, Vladimir A Mandelshtam
- The Journal of chemical physics
- 2013

The self-consistent phonons (SCP) method provides a consistent way to include anharmonic effects when treating a many-body quantum system at thermal equilibrium. The system is then described by an… (More)