March 2021 - Materia-seminarios

[Cambio de Hora] Webminario: Speck of Chaos
by Daniel Manzano 25 Mar '21

25 Mar '21

[Atentos al cambio de hora] El grupo de Física Estadística de los Sistemas Complejos les invita al siguiente seminario online: Ponente: Francisco Perez-Bernal. Universidad de Huelva. Título: Speck of Chaos Resumen: Local perturbations can bring an integrable quantum many-body system to the chaotic regime. This fact has been known for the XXZ model since 2004, and such results have been recently extended to two other models: the transverse-field Ising chain and the Lai-Sutherland spin 1 chain. The nature of different quantum chaos indicators, static and dynamic, will be reviewed, to discuss how a single local effect can bring three different integrable systems to the chaotic regime. Among the possible indicators, the distribution of off-diagonal matrix elements of local operators and the correlation hole will be presented with more detail. Fecha y hora: Viernes 26 de Marzo de 2021. 12:30 horas. Enlace: https://meet.google.com/vyq-ucva-vdj <https://meet.google.com/vyq-ucva-vdj> Check our 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/>

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Seminar Series: Excited State Quantum Phase Transitions and related topics
by Daniel Manzano 24 Mar '21

24 Mar '21

Starting in March 2021, The University of Huelva is organizing a series of online seminars about Excited State Quantum Phase Transitions and related topics. The seminars will have a duration of 50-60 minutes plus questions. The aim of this series of talks is to keep the community working in ESQPTs and related topics in touch and aware of the research advances in the different groups working in the field. Among other, talks are expected to deal with developments including: • Experimental evidences of ESQPTs in different quantum many-body systems • Influence of ESQPTs on the dynamics of quantum many-body systems • Thermodynamic consequences of ESQPTs • Possible links between ESQPTs and manifestations of chaos in quantum systems • ESQPTs and quantum information scrambling • Role of ESQPTs in ergodicity and thermalization in many-body quantum systems Talks will be given by senior researchers as well as students and postdocs. Seminars are organized by José Enrique García Ramos and Curro Pérez Bernal in the CEAFMC, University of Huelva. Feel free to reach us out by email with any comments and suggestions. More info: https://www.uhu.es/fmc/ESQPT2021 <https://www.uhu.es/fmc/ESQPT2021> --------------------------------------------------------------------------------- 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/>

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Webminario: Speck of Chaos
by Daniel Manzano 24 Mar '21

24 Mar '21

El grupo de Física Estadística de los Sistemas Complejos les invita al siguiente seminario online: Ponente: Francisco Perez-Bernal. Universidad de Huelva. Título: Speck of Chaos Resumen: Local perturbations can bring an integrable quantum many-body system to the chaotic regime. This fact has been known for the XXZ model since 2004, and such results have been recently extended to two other models: the transverse-field Ising chain and the Lai-Sutherland spin 1 chain. The nature of different quantum chaos indicators, static and dynamic, will be reviewed, to discuss how a single local effect can bring three different integrable systems to the chaotic regime. Among the possible indicators, the distribution of off-diagonal matrix elements of local operators and the correlation hole will be presented with more detail. Fecha y hora: Viernes 26 de Marzo de 2021. 12 horas. Enlace: https://meet.google.com/vyq-ucva-vdj <https://meet.google.com/vyq-ucva-vdj> Check our 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/>

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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/

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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/>

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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/>

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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/>

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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/>

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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/>

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