Article (Scientific journals)
Molecular decision trees realized by ultrafast electronic spectroscopy
Fresch, Barbara; Hiluf, Dawit; Collini, Elisabetta et al.
2013In Proceedings of the National Academy of Sciences of the United States of America, 110 (43), p. 17183-17188
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Abstract :
[en] The outcome of a light–matter interaction depends on both the state of matter and the state of light. It is thus a natural setting for implementing bilinear classical logic. A description of the state of a time-varying system requires measuring an (ideally complete) set of time-dependent observables. Typically, this is prohibitive, but in weak-field spectroscopy we can move toward this goal because only a finite number of levels are accessible. Recent progress in nonlinear spectroscopies means that nontrivial measurements can be implemented and thereby give rise to interesting logic schemes where the outputs are functions of the observables. Lie algebra offers a natural tool for generating the outcome of the bilinear light–matter interaction. We show how to synthesize these ideas by explicitly discussing three-photon spectroscopy of a bichromophoric molecule for which there are four accessible states. Switching logic would use the on–off occupancies of these four states as outcomes. Here, we explore the use of all 16 observables that define the time-evolving state of the bichromophoric system. The bilinear laser–system interaction with the three pulses of the setup of a 2D photon echo spectroscopy experiment can be used to generate a rich parallel logic that corresponds to the implementation of a molecular decision tree. Our simulations allow relaxation by weak coupling to the environment, which adds to the complexity of the logic operations.
Disciplines :
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Author, co-author :
Fresch, Barbara ;  Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de chimie physique théorique
Hiluf, Dawit
Collini, Elisabetta
Levine, Raphaël David
Remacle, Françoise  ;  Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de chimie physique théorique
Language :
English
Title :
Molecular decision trees realized by ultrafast electronic spectroscopy
Publication date :
2013
Journal title :
Proceedings of the National Academy of Sciences of the United States of America
ISSN :
0027-8424
eISSN :
1091-6490
Publisher :
National Academy of Sciences, Washington, United States - District of Columbia
Volume :
110
Issue :
43
Pages :
17183-17188
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 December 2013

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