Decoherence in Attosecond Photoionization

Details Decoherence in Attosecond Photoionization Decoherence in Attosecond Photoionization

2011-01-12

arxiv.org/abs/1101.2314v1

Phys. Rev. Lett. 106, 053003 (2011)

Physics

Atomic Physics

4 pages, 4 figures, accepted by Physical Review Letters

Scientific paper

10.1103/PhysRevLett.106.053003

The creation of superpositions of hole states via single-photon ionization using attosecond extreme-ultraviolet pulses is studied with the time-dependent configuration interaction singles (TDCIS) method. Specifically, the degree of coherence between hole states in atomic xenon is investigated. We find that interchannel coupling not only affects the hole populations, it also enhances the entanglement between the photoelectron and the remaining ion, thereby reducing the coherence within the ion. As a consequence, even if the spectral bandwidth of the ionizing pulse exceeds the energy splittings among the hole states involved, perfectly coherent hole wave packets cannot be formed. For sufficiently large spectral bandwidth, the coherence can only be increased by increasing the mean photon energy.

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