ELFT HÍRADÓ

[andraspalyi AT caesar.elte.hu]

Az ELTE Nanofizika Szeminarium jovo hetfoi eloadasa:


Vattay Gabor (ELTE): Evolutionary Design in Biological Quantum Computing


Idopont: 2013. oktober 14., hetfo, 10:15
Helyszin: ELTE Eszaki Tomb, 5.128-as terem (1117 Budapest, Pazmany  
Peter setany 1/A)


Kivonat:

"The unique capability of quantum mechanics to evolve alternative  
possibilities in parallel is appealing and over the years a number of  
quantum algorithms have been developed offering great  computational  
benefits. Systems coupled to the environment lose quantum coherence  
quickly and realization of schemes based on
unitarity might be impossible.  Recent discovery of room temperature  
quantum coherence in light harvesting complexes \cite{Nature.10.1038,  
Nature08811, Panitchayangkoon20072010, PNAS2011} opens up new  
possibilities to borrow concepts from biology to use quantum effects  
for computational purposes. While it has been conjectured that light  
harvesting complexes such as the Fenna-Matthews-Olson (FMO) complex in  
the green sulfur bacteria performs an efficient quantum search similar  
to the quantum Grover's algorithm \cite{Nature.10.1038, Mohseni,  
Grover} the analogy has yet to be established.

In this work we show that quantum dissipation plays an essential role  
in the quantum search performed in the FMO complex and it is  
fundamentally different from known algorithms. In the FMO complex not  
just the optimal level of phase breaking is present to avoid both  
quantum localization and Zeno trapping \cite{LloydGuzik, Lloyd} but it  
can harness quantum dissipation as well to speed the process even  
further up. With detailed quantum calculations taking into account  
both phase breaking and quantum dissipation we show that the design of  
the FMO complex has been evolutionarily optimized and works faster  
than pure quantum or classical-stochastic algorithms. Inspired by the  
findings we introduce a new computational concept based on decoherent   
quantum evolution.
While it is inspired by light harvesting systems, the new  
computational devices can also be realized on different material basis  
opening new magnitude scales for miniaturization and speed."




Minden erdeklodot szivesen latunk.

A szeminarium tovabbi programja:  
http://wigner.elte.hu/koltai/science/?q=seminar

Udvozlettel,
Palyi Andras