Nov 25, 2021
- Seth Lloyd -
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- Seth Lloyd -
Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
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Check out my playlist on @8tracks: b r e a t h e by lucyhenley.
“Fill your paper with the breathings of your heart.” ― William Wordsworth
cover: Photo by Fabian Møller on Unsplash https://unsplash.com/photos/gI7zgb80QWY
Abstract
Energy transfer within photosynthetic systems can display quantum effects such as delocalized excitonic transport. Recently, direct evidence of long-lived coherence has been experimentally demonstrated for the dynamics of the Fenna-Matthews-Olson (FMO) protein complex [Engel et al., Nature 446, 782 (2007)]. However, the relevance of quantum dynamical processes to the exciton transfer efficiency is to a large extent unknown. Here, we develop a theoretical framework for studying the role of quantum interference effects in energy transfer dynamics of molecular arrays interacting with a thermal bath within the Lindblad formalism. To this end, we generalize continuous-time quantum walks to non-unitary and temperature-dependent dynamics in Liouville space derived from a microscopic Hamiltonian. Different physical effects of coherence and decoherence processes are explored via a universal measure for the energy transfer efficiency and its susceptibility. In particular, we demonstrate that for the FMO complex an effective interplay between free Hamiltonian and thermal fluctuations in the environment leads to a substantial increase in energy transfer efficiency from about 70% to 99%.
- Seth Lloyd -
Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
Free to watch • No registration required • HD streaming
Instead of having to be a member of the Royal Society to do science, the way you had to be in England in the 17th, 18th, centuries today pretty much anybody who wants to do it can, and the information that they need to do it is there. Baba Quotes
Quote Topic : Science Quotes Quote Author : Seth Lloyd Source link: https://babaquotes.com/seth-lloyd/instead-of-having-to-be-a-member-of-the-royal-society-to-do-science-the-way-you-had-to-be-in-england-in-the-17th-18th-centuries-today-pretty-much-anybody-who-wants-to-do-it-can-and-the-information/ babaquotes.com (Baba Quotes) #Seth_Lloyd_sayings #Science_quoets #babaquotes
Something else has happened with computers.
http://selfawaresystems.com/2014/09/08/the-whole-universe-cant-search-500-bits/
“Seth Lloyd analyzed the computational capacity of physical systems in his 2000 Nature paper “Ultimate physical limits to computation” and in his 2006 book “Programming the Universe”. Using the very general Margolus-Levitin theorem, he showed that a 1 kilogram, 1 liter “ultimate laptop” can perform at most 10^51 operations per second and store 10^31 bits.
The entire visible universe since the big bang is capable of having performed 10^122 operations and of storing 10^92 bits. While these are large numbers, they are still quite finite. 10^122 is roughly 2^406, so the entire universe used as a massive quantum computer is still not capable of searching through all combinations of 500 bits.
This limitation is good news for our ability to design infrastructure today that will still constrain future superintelligences. Cryptographic systems that require brute force searching for a 500 bit key will remain secure even in the face of the most powerful superintelligence. In Base64, the following key:
kdlIW5Ljlspn/zV4DIlsw3Kasdjh0kdfuKR4+Q3KofOr83LfLJ8Eidie83ldhgLEe0GlsiwcdO90SknlLsDd
would stymie the entire universe doing a brute force search.”