Electronic quantum coherence in glycine molecules probed with ultrashort x-ray pulses in real time.
Electronic quantum coherence in glycine molecules probed with ultrashort x-ray pulses in real time.
复制标题
DOI:
10.1126/sciadv.abn6848
复制
发表时间:
2022-06-03
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Here, we use x-rays to create and probe quantum coherence in the photoionized amino acid glycine. The outgoing photoelectron leaves behind the cation in a coherent superposition of quantum mechanical eigenstates. Delayed x-ray pulses track the induced coherence through resonant x-ray absorption that induces Auger decay and by photoelectron emission from sequential double photoionization. Sinusoidal temporal modulation of the detected signal at early times (0 to 25 fs) is observed in both measurements. Advanced ab initio many-electron simulations allow us to explain the first 25 fs of the detected coherent quantum evolution in terms of the electronic coherence. In the kinematically complete x-ray absorption measurement, we monitor its dynamics for a period of 175 fs and observe an evolving modulation that may implicate the coupling of electronic to vibronic coherence at longer time scales. Our experiment provides a direct support for the existence of long-lived electronic coherence in photoionized biomolecules. The quantum mechanically evolving electron charge distribution in glycine molecules is monitored via direct real-time measurement.
登录
查看更多内容
影响因子:
4.4
作者:
Kuleff, AI;Breidbach, J;Cederbaum, LS
通讯作者:
Cederbaum, LS
影响因子:
15
作者:
Neville, JJ;Zheng, Y;Brion, CE
通讯作者:
Brion, CE
影响因子:
2.9
作者:
Plekan, Oksana;Feyer, Vitaliy;Carravetta, Vincenzo
通讯作者:
Carravetta, Vincenzo
影响因子:
3.3
作者:
Ruberti, M.
通讯作者:
Ruberti, M.
DOI:
10.1073/pnas.2015988117
发表时间:
2020-09-29
影响因子:
11.1
作者:
Keefer, Daniel;Schnappinger, Thomas;Mukamel, Shaul
通讯作者:
Mukamel, Shaul