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Far-from-equilibrium dynamics of angular momentum in a quantum many-particle system. (submitted to Phys. Rev. Lett.)

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Schmidt,  Richard
Theory, Max Planck Institute of Quantum Optics, Max Planck Society;

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Citation

Cherepanov, I. N., Bighin, G., Christiansen, L., Jørgensen, A. V., Schmidt, R., Stapelfeldt, H., et al. (submitted). Far-from-equilibrium dynamics of angular momentum in a quantum many-particle system. (submitted to Phys. Rev. Lett.).


Cite as: http://hdl.handle.net/21.11116/0000-0008-CD01-0
Abstract
We use laser-induced rotation of single molecules embedded in superfluid helium nanodroplets to reveal angular momentum dynamics and transfer in a controlled setting, under far-from-equilibrium conditions. As an unexpected result, we observe pronounced oscillations of time-dependent molecular alignment that have no counterpart in gas-phase molecules. Angulon theory reveals that these oscillations originate from the unique rotational structure of molecules in He droplets and quantum-state-specific transfer of rotational angular momentum to the many-body He environment on picosecond timescales. Our results pave the way to understanding collective effects of macroscopic angular momentum exchange in solid state systems in a bottom-up fashion.