- Materia-seminarios

Recordatorio de Seminario: What is typical in microbial communities?
by Daniel Manzano 19 Mar '21

19 Mar '21

El grupo de Física Estadística y de los Sistemas Complejos les invita al siguiente seminario online: Speaker: Jacopo Grilli. International Centre for Theoretical Physics (ICTP, Trieste, Italy) Title: What is typical in microbial communities? Abstract: Microbial communities are highly dimensional, with many species and many variable environmental factors. Macroecology, which studies communities as statistical ensembles, is a promising way to connect these complex data to mechanistic models. In this talk, I will discuss a minimal set of macroecological patterns that characterize the statistical properties of species abundance fluctuations across communities and over time. A mathematical model based on environmental stochasticity quantitatively predicts these three macroecological laws, as well as non-stationary properties of community dynamics. Building on these results, it is possible to disentangle the (statistical) properties that determine ecosystems' stability over time and reproducibility across communities. Link: https://meet.google.com/rfe-pvvb-zvk Date and time: Viernes 19 de Marzo, 12:00. More info: https://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/03/17/what-is-typic… Previous talks: Ricardo Gutierrez: Generalized optimal paths and weight distributions on networks. <https://youtu.be/xyjgh0xeXbo> Beatriz Olmos: Collective coupling of an array of atoms near a nanofiber <https://youtu.be/OBKkd-XHAa8> Daniel Maria Busiello: Non-equilibrium selection of chemical states driven by dissipation phenomena <https://youtu.be/rFJAo14o68Q> Atentamente, --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/

1 0

Seminario online: What is typical in microbial communities?
by Daniel Manzano 17 Mar '21

17 Mar '21

El grupo de Física Estadística y de los Sistemas Complejos les invita al siguiente seminario online: Speaker: Jacopo Grilli. International Centre for Theoretical Physics (ICTP, Trieste, Italy) Title: What is typical in microbial communities? Abstract: Microbial communities are highly dimensional, with many species and many variable environmental factors. Macroecology, which studies communities as statistical ensembles, is a promising way to connect these complex data to mechanistic models. In this talk, I will discuss a minimal set of macroecological patterns that characterize the statistical properties of species abundance fluctuations across communities and over time. A mathematical model based on environmental stochasticity quantitatively predicts these three macroecological laws, as well as non-stationary properties of community dynamics. Building on these results, it is possible to disentangle the (statistical) properties that determine ecosystems' stability over time and reproducibility across communities. Link: https://meet.google.com/rfe-pvvb-zvk <https://meet.google.com/rfe-pvvb-zvk> Date and time: Viernes 19 de Marzo, 12:00. More info: https://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/03/17/what-is-typic… <https://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/03/17/what-is-typic…> Previous talks: Ricardo Gutierrez: Generalized optimal paths and weight distributions on networks <https://youtu.be/xyjgh0xeXbo>. Beatriz Olmos: Collective coupling of an array of atoms near a nanofiber <https://youtu.be/OBKkd-XHAa8> Daniel Maria Busiello: Non-equilibrium selection of chemical states driven by dissipation phenomena <https://youtu.be/rFJAo14o68Q> Atentamente, --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/>

1 0

Recordatorio de seminario: Finding generalized optimal paths and weight distributions by an analysis of the large deviations of random walks on networks
by Daniel Manzano 12 Mar '21

12 Mar '21

El Grupo de Física Estadística de los Sistemas Complejos les invita a asistir al siguiente seminario online: Título: Finding generalized optimal paths and weight distributions by an analysis of the large deviations of random walks on networks Ponente: Ricardo Gutiérrez (Complex Systems Interdisciplinary Group, Department of Mathematics, Universidad Carlos III de Madrid) Abstract: In this talk I will present a novel method for finding optimal paths and optimal weight distributions. It is based on the analysis of large deviations of random walks on networks, and it leads to a generalization of the standard definitions to encompass paths and weight distributions tailored to a given statistical characterization of time-extensive observables in the presence of constraints. All dynamical aspects of the problem (the random walk transition matrix, the observables and the statistical ensemble) are chosen so as to best reveal the underlying structural features of interest. After a discussion of the main aspects of the theoretical framework, some examples involving random graphs and spatial networks will be presented. Reference: Phys. Rev. E 103, 022319 (2021)). Fecha y hora: Viernes 12 de Marzo, 12:00. Enlace: https://meet.google.com/bjy-gcmc-ioo <https://meet.google.com/bjy-gcmc-ioo> Más info: http://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/03/10/finding-genera… <http://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/03/10/finding-genera…> Pueden también encontrar nuestros anteriores seminarios en nuestro canal de Youtube: <https://www.youtube.com/channel/UCzMYcNv1jXSTY285GrFgBRQ> Beatriz Olmos: Collective coupling of an array of atoms near a nanofiber <https://www.youtube.com/watch?v=OBKkd-XHAa8> Daniel Maria Busiello: Non-equilibrium selection of chemical states driven by dissipation phenomena <https://www.youtube.com/watch?v=rFJAo14o68Q> Paula Villa: Ocean currents promote rare species diversity in protists. <https://www.youtube.com/watch?v=TNCEQUd9caU> --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/>

1 0

Seminario: Finding generalized optimal paths and weight distributions by an analysis of the large deviations of random walks on networks
by Daniel Manzano 10 Mar '21

10 Mar '21

El Grupo de Física Estadística de los Sistemas Complejos les invita a asistir al siguiente seminario online: Título: Finding generalized optimal paths and weight distributions by an analysis of the large deviations of random walks on networks Ponente: Ricardo Gutiérrez (Complex Systems Interdisciplinary Group, Department of Mathematics, Universidad Carlos III de Madrid) Abstract: In this talk I will present a novel method for finding optimal paths and optimal weight distributions. It is based on the analysis of large deviations of random walks on networks, and it leads to a generalization of the standard definitions to encompass paths and weight distributions tailored to a given statistical characterization of time-extensive observables in the presence of constraints. All dynamical aspects of the problem (the random walk transition matrix, the observables and the statistical ensemble) are chosen so as to best reveal the underlying structural features of interest. After a discussion of the main aspects of the theoretical framework, some examples involving random graphs and spatial networks will be presented. Reference: Phys. Rev. E 103, 022319 (2021)). Fecha y hora: Viernes 12 de Marzo, 12:00. Enlace: https://meet.google.com/bjy-gcmc-ioo <https://meet.google.com/bjy-gcmc-ioo> Pueden también encontrar nuestros anteriores seminarios en nuestro canal de Youtube: <https://www.youtube.com/channel/UCzMYcNv1jXSTY285GrFgBRQ> Beatriz Olmos: Collective coupling of an array of atoms near a nanofiber <https://www.youtube.com/watch?v=OBKkd-XHAa8> Daniel Maria Busiello: Non-equilibrium selection of chemical states driven by dissipation phenomena <https://www.youtube.com/watch?v=rFJAo14o68Q> Paula Villa: Ocean currents promote rare species diversity in protists. <https://www.youtube.com/watch?v=TNCEQUd9caU> Atentamente. --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/>

1 0

Recordatorio seminario: Collective coupling of an array of atoms near a nanofiber
by Daniel Manzano 04 Mar '21

04 Mar '21

El grupo de Física Estadística de los Sistemas Complejos les invita a asistir al siguiente seminario. Ponente: Prof. Beatriz Olmos, University of Tübingen. Titulo: „Collective coupling of an array of atoms near a nanofiber“ Abstract: In this talk, I will summarize some of the latest results we have published in our group on a light-matter system composed of emitters coupled to light modes which propagate in a waveguide. This setup is subject matter of many current experimental studies, as it holds promise of applications in quantum information routing and processing, e.g., as optical isolators and circulators where the light is emitted unidirectionally, or as generators of entangled atomic and photonic states. Among other results, I will show you how due to the collective light-matter interaction with the radiation field, an array of atoms can scatter light from an external laser field almost exclusively into one of the guided modes of the waveguide, allowing for almost lossless and completely unidirectional channelling of photons. Moreover, I will show you that the spectral properties of the scattered light depend strongly on the angle of incidence of the laser field on the array and the dispersive interactions between the light and the atoms, uncovering a modified Bragg condition. Fecha y hora: Viernes 5 de Marzo, 12:00. Enlace: https://meet.google.com/fcm-rbgf-hoe Info: http://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/03/02/collective-cou… --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/>

1 0

Seminario: Collective coupling of an array of atoms near a nanofiber
by Daniel Manzano 02 Mar '21

02 Mar '21

El grupo de Física de los Sistemas Complejos les invita a asistir al siguiente seminario. Ponente: Prof. Beatriz Olmos, University of Tübingen. Titulo: „Collective coupling of an array of atoms near a nanofiber“ Abstract: In this talk, I will summarize some of the latest results we have published in our group on a light-matter system composed of emitters coupled to light modes which propagate in a waveguide. This setup is subject matter of many current experimental studies, as it holds promise of applications in quantum information routing and processing, e.g., as optical isolators and circulators where the light is emitted unidirectionally, or as generators of entangled atomic and photonic states. Among other results, I will show you how due to the collective light-matter interaction with the radiation field, an array of atoms can scatter light from an external laser field almost exclusively into one of the guided modes of the waveguide, allowing for almost lossless and completely unidirectional channelling of photons. Moreover, I will show you that the spectral properties of the scattered light depend strongly on the angle of incidence of the laser field on the array and the dispersive interactions between the light and the atoms, uncovering a modified Bragg condition. Fecha y hora: Viernes 5 de Marzo, 12:00. Enlace: https://meet.google.com/fcm-rbgf-hoe <https://meet.google.com/fcm-rbgf-hoe> Info: http://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/03/02/collective-cou… <http://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/03/02/collective-cou…> --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/>

1 0

Seminario: Non-equilibrium selection of chemical states driven by dissipation phenomena
by Daniel Manzano 24 Feb '21

24 Feb '21

Ponente: Daniel Maria Busiello (EPFL, Laussane). Título: Non-equilibrium selection of chemical states driven by dissipation phenomena Resumen: Life has most likely originated as a consequence of processes taking place in non-equilibrium conditions (e.g. in the proximity of deep-sea thermal vents) selecting states of matter that would have been otherwise unfavorable at equilibrium. External sources, and the subsequent thermodynamic necessity of dissipating heat, might have driven pre-biotic molecules against their equilibrium fate. In a simple chemical network, the presence of a thermal gradient selects states participating to faster reactions and contributing the most to the dissipation rate. The furanose conundrum potentially finds a solution within this picture. Furanose is boosted beyond the limits set by equilibrium thermodynamics, exhibiting maximum selection at optimal dissipation, as gauged by the temperature gradient and energy barriers for isomerization. This predicted optimum is compatible with temperature drops found in hydrothermal vents. A byproduct of our approach is that as the complexity of the chemical network increases, the velocity of reaction paths leading to a given state determines its selection, giving rise to non-trivial localization phenomena in state space. The proposed framework singles out the role of non-equilibrium dissipation, in particular when it is declinable in terms of entropy production rate. A general non-equilibrium dissipative functional might generalize our intuition, potentially providing a better grasp on processes underpinning selection. Día y hora: Viernes 26 de Febrero, 12 horas. Lugar: Online en el enlace https://meet.google.com/kez-diov-xay <https://meet.google.com/kez-diov-xay> Más info: http://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/02/23/non-equilibriu… <http://ic1.ugr.es/eventos/wp/seminariosinternos16/2021/02/23/non-equilibriu…> --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/>

1 0

Fwd: [Materia] Curso Sistemas cuánticos abiertos
by Daniel Manzano 03 Nov '20

03 Nov '20

--------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/> > Begin forwarded message: > > From: Daniel Manzano <manzano(a)onsager.ugr.es> > Subject: [Materia] Curso Sistemas cuánticos abiertos > Date: 3. November 2020 at 17:23:56 CET > To: Materia <Materia(a)onsager.ugr.es> > > Hola a todes. > > Mi amigo Antonio Lasanta me ha pedido que les de un curso sobre Ecuación de Lindblad y sistemas cuánticos abiertos. Es básicamente el mismo que di a los doctorandos el curso pasado, pero si alguien se lo perdió y quiere asistir ahora tiene otra oportunidad. > > Un saludo. > > Dani. > > --------------------------------------------------------------------------------- > Daniel Manzano > Electromagnetism and Condensed Matter Department > Institute “Carlos I” for Theoretical and Computational Physics > University of Granada > Facultad de Ciencias, Av. Fuentenueva s/n > Granada 18071, Spain > Phone: +34 958241000 Ext: 20569 > http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/> > > > > > > _______________________________________________ > Materia mailing list > Materia(a)onsager.ugr.es > https://onsager.ugr.es/mailman/listinfo/materia

1 0

Recordatorio de seminario: Ecology, politics, and ethics of quantum computing.
by Daniel Manzano 29 Oct '20

29 Oct '20

El grupo de Física Estadística de los Sistemas Complejos les invita al siguiente seminario. Título: Ecology, politics, and ethics of quantum computing. Ponente: Emma McKay (they/them), York University. Fecha y hora: Jueves 29 de Octubre 16:30. Resumen: Quantum computing is growing in influence, thanks to interest from corporations and militaries. Many ethical decisions are thus present in this science, whether we like it or not. Thankfully, there are tools from science and technology studies that can help us make decisions with a critical eye by situating the work in a larger political and ecological context. In this talk, I will do just that for quantum work. First, I will share my own experience coming to see quantum science as ethically fraught. Then, we'll look at the issues with the resources required to build quantum computers and with their applications in the military and corporations. Finally, I'll connect this context to ethics and the ability to prevent a project from going forward. El seminario se realizará online y se podrá seguir en el siguiente enlace: https://laplace.ugr.es/b/seminarios-materia <https://laplace.ugr.es/b/seminarios-materia> --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/>

1 0

Seminario: Ecology, politics, and ethics of quantum computing.
by Daniel Manzano 26 Oct '20

26 Oct '20

El grupo de Física Estadística de los Sistemas Complejos les invita al siguiente seminario. Título: Ecology, politics, and ethics of quantum computing. Ponente: Emma McKay (they/them), York University. Fecha y hora: Jueves 29 de Octubre 16:30. Resumen: Quantum computing is growing in influence, thanks to interest from corporations and militaries. Many ethical decisions are thus present in this science, whether we like it or not. Thankfully, there are tools from science and technology studies that can help us make decisions with a critical eye by situating the work in a larger political and ecological context. In this talk, I will do just that for quantum work. First, I will share my own experience coming to see quantum science as ethically fraught. Then, we'll look at the issues with the resources required to build quantum computers and with their applications in the military and corporations. Finally, I'll connect this context to ethics and the ability to prevent a project from going forward. El seminario se realizará online y se podrá seguir en el siguiente enlace: https://laplace.ugr.es/b/seminarios-materia <https://laplace.ugr.es/b/seminarios-materia> Atentamente, --------------------------------------------------------------------------------- Daniel Manzano Electromagnetism and Condensed Matter Department Institute “Carlos I” for Theoretical and Computational Physics University of Granada Facultad de Ciencias, Av. Fuentenueva s/n Granada 18071, Spain Phone: +34 958241000 Ext: 20569 http://ic1.ugr.es/manzano/ <http://ic1.ugr.es/manzano/>

1 0