Details
| Original language | English |
|---|---|
| Pages (from-to) | 891-899 |
| Number of pages | 9 |
| Journal | Journal of Physical Chemistry Letters |
| Volume | 11 |
| Issue number | 3 |
| Early online date | 16 Jan 2020 |
| Publication status | Published - 6 Feb 2020 |
| Externally published | Yes |
Abstract
Extreme-ultraviolet-induced charge migration in biorelevant molecules is a fundamental step in the complex path leading to photodamage. In this work we propose a simple interpretation of the charge migration recently observed in an attosecond pump-probe experiment on the amino acid tryptophan. We find that the decay of the prominent low-frequency spectral structure with increasing pump-probe delay is due to a quantum beating between two geometrically distinct, almost degenerate charge oscillations. Quantum beating is ubiquitous in these systems, and at least on the few-to-tens of femtosecond time scales, it may dominate over decoherence the line intensities of time-resolved spectra. We also address the experimentally observed phase shift in the charge oscillations of two different amino acids, tryptophan and phenylalanine. Our results indicate that a beyond mean-field treatment of the electron dynamics is necessary to reproduce the correct behavior.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Journal of Physical Chemistry Letters, Vol. 11, No. 3, 06.02.2020, p. 891-899.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ultrafast Quantum Interference in the Charge Migration of Tryptophan
AU - Perfetto, E.
AU - Trabattoni, A.
AU - Calegari, F.
AU - Nisoli, M.
AU - Marini, A.
AU - Stefanucci, G.
N1 - Publisher Copyright: Copyright © 2020 American Chemical Society.
PY - 2020/2/6
Y1 - 2020/2/6
N2 - Extreme-ultraviolet-induced charge migration in biorelevant molecules is a fundamental step in the complex path leading to photodamage. In this work we propose a simple interpretation of the charge migration recently observed in an attosecond pump-probe experiment on the amino acid tryptophan. We find that the decay of the prominent low-frequency spectral structure with increasing pump-probe delay is due to a quantum beating between two geometrically distinct, almost degenerate charge oscillations. Quantum beating is ubiquitous in these systems, and at least on the few-to-tens of femtosecond time scales, it may dominate over decoherence the line intensities of time-resolved spectra. We also address the experimentally observed phase shift in the charge oscillations of two different amino acids, tryptophan and phenylalanine. Our results indicate that a beyond mean-field treatment of the electron dynamics is necessary to reproduce the correct behavior.
AB - Extreme-ultraviolet-induced charge migration in biorelevant molecules is a fundamental step in the complex path leading to photodamage. In this work we propose a simple interpretation of the charge migration recently observed in an attosecond pump-probe experiment on the amino acid tryptophan. We find that the decay of the prominent low-frequency spectral structure with increasing pump-probe delay is due to a quantum beating between two geometrically distinct, almost degenerate charge oscillations. Quantum beating is ubiquitous in these systems, and at least on the few-to-tens of femtosecond time scales, it may dominate over decoherence the line intensities of time-resolved spectra. We also address the experimentally observed phase shift in the charge oscillations of two different amino acids, tryptophan and phenylalanine. Our results indicate that a beyond mean-field treatment of the electron dynamics is necessary to reproduce the correct behavior.
UR - http://www.scopus.com/inward/record.url?scp=85079077077&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.9b03517
DO - 10.1021/acs.jpclett.9b03517
M3 - Article
C2 - 31944766
AN - SCOPUS:85079077077
VL - 11
SP - 891
EP - 899
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
SN - 1948-7185
IS - 3
ER -