Podcasts about quantum walk

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This week's episode features coughing, an apology (not for the coughing), and cat-talk. Also we discuss science communication, agency and historical periodization, intentional urban planning, living aesthetically, programming and will, surfing and gravity, noir and detective stories (watch Cutter's Way), and large forces that seem to control our lives (or do they?) and are impossible to understand (or are they??!!). For those of you who want to cut straight to the news about Matt's cats' diets, it's at 1:04:20. Be on the lookout for friend-of-the-show Daniel Aldana Cohen's interview with source-of-the-material-of-the-show-and-listener-to-and-number-one-fan-of-the-show Kim Stanley Robinson on The Dig from Jacobin (@thedigradio)! Thanks for listening! Email us at maroonedonmarspodcast@gmail.com Follow us on Twitter @podcastonmars Leave us a voicemail on the Anchor.fm app Rate and review us on iTunes or wherever you listen to your podcasts! Music by Spirit of Space --- Send in a voice message: https://anchor.fm/marooned-on-mars/message

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.10.14.337840v1?rss=1 Authors: D'Acunto, M. Abstract: Protein-DNA interactions play a fundamental role in all life systems. A critical issue of such interactions is given by the strategy of protein search for specific targets on DNA. The mechanisms by which the protein are able to find relatively small cognate sequences, typically 15-20 base pairs (bps) for repressors, and 4-6 bps for restriction enzymes among the millions of bp of non-specific chromosomal DNA have hardly engaged researcher for decades. Recent experimental studies have generated new insights on the basic processes of protein-DNA interactions evidencing the underlying complex dynamic phenomena involved, which combine three-dimensional and one-dimensional motion along the DNA chain. It has been demonstrated that protein molecules spend most of search time on the DNA chain with an extraordinary ability to find the target very quickly, in some cases, with two orders of magnitude faster than the diffusion limit. This unique property of protein-DNA search mechanism is known as facilitated diffusion. Several theoretical mechanisms have been suggested to describe the origin of facilitated diffusion. However, none of such models currently has the ability to fully describe the protein search strategy. In this paper, we suggest that the ability of proteins to identify consensus sequence on DNA is based on the entanglement of {pi}-{pi} electrons between DNA nucleotides and protein amino acids. The {pi}-{pi} entanglement is based on Quantum Walk (QW), through Coin-position entanglement (CPE). First, the protein identifies a dimer belonging to the consensus sequence, and localize a {pi} on such dimer, hence, the other {pi} electron scans the DNA chain until the sequence is identified. By focusing on the example of recognition of consensus sequences by EcoRV or EcoRI, we will describe the quantum features of QW on protein-DNA complexes during search strategy, such as walker quadratic spreading on a coherent superposition of different vertices and environment-supported long-time survival probability of the walker. We will employ both discrete- or continuous-time versions of QW. Biased and unbiased classical Random Walk (CRW) has been used for a long time to describe Protein-DNA search strategy. QW, the quantum version of CRW, have been widely studied for its applications in quantum information applications. In our biological application, the walker (the protein) resides at a vertex in a graph (the DNA structural topology). Differently to CRW, where the walker moves randomly, the quantum walker can hop along the edges in the graph to reach other vertices entering coherently a superposition across different vertices spreading quadratically faster than CRW analogous evidencing the typical speed up features of the QW. When applied to protein-DNA target search problem, QW gives the possibility to achieve the experimental diffusional motion of proteins over diffusion classical limits experienced along DNA chains exploiting quantum features such as CPE and long-time survival probability supported by environment. In turn, we come to the conclusion that, under quantum picture, the protein search strategy does not distinguish between one-dimensional (1D) and three-dimensional (3D) case. Copy rights belong to original authors. Visit the link for more info

Santha, M (Université Paris 7 - Denis-Diderot) Friday 06 September 2013, 10:00-11:00

Santha, M (Université Paris 7 - Denis-Diderot) Thursday 05 September 2013, 15:30-16:30

Big Ideas presents Seth Lloyd of the Massachusetts Institute for Technology on Quantum Life, how organisms have evolved to make use of quantum effects.

Big Ideas presents Seth Lloyd of the Massachusetts Institute for Technology on Quantum Life, how organisms have evolved to make use of quantum effects.

Big Ideas presents Seth Lloyd of the Massachusetts Institute for Technology on Quantum Life, how organisms have evolved to make use of quantum effects.

We explore the history of Pi, examine rheumatoid arthritis and seek the science of sleep in this roundup of the British Science Festival. In the news, we hear how to read the history of the solar system on the surface of the moon, and discover a development in quantum computing. Plus, we launch Naked Engineering, stripping off the image of dirty overalls to discover how engineers solve real-world problems. Diana asks if olive oil is healthier than butter in our Question of the Week. Like this podcast? Please help us by supporting the Naked Scientists

We explore the history of Pi, examine rheumatoid arthritis and seek the science of sleep in this roundup of the British Science Festival. In the news, we hear how to read the history of the solar system on the surface of the moon, and discover a development in quantum computing. Plus, we launch Naked Engineering, stripping off the image of dirty overalls to discover how engineers solve real-world problems. Diana asks if olive oil is healthier than butter in our Question of the Week. Like this podcast? Please help us by supporting the Naked Scientists

New research into the incredible properties of objects at the quantum scale has brought the aim of quantum computing far closer to reality. Ben Valsler speaks to researchers from Bristol University to find out how "quantum walk" will enable us to understand systems that even the fastest modern supercomputers would find impossible... Like this podcast? Please help us by supporting the Naked Scientists

New research into the incredible properties of objects at the quantum scale has brought the aim of quantum computing far closer to reality. Ben Valsler speaks to researchers from Bristol University to find out how "quantum walk" will enable us to understand systems that even the fastest modern supercomputers would find impossible... Like this podcast? Please help us by supporting the Naked Scientists