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PhD Thesis Defense on Friday, Feb 24, 2023 at 11:00
by semfis＠ifisc.uib-csic.es 17 Feb '23

17 Feb '23

PhD Thesis Defense on Friday Feb 24, 2023 at 11:00 Place: IFISC Seminar Room Title: Characterization and simulation of multipartite open quantum systems Speaker: Marco Cattaneo, Algorithmiq (Helsinki, Finland), PhD student of UIB (IFISC) and the University of Helsinki Abstract: Motivated by renewed studies on dissipative collective effect and by new discoveries about the features of noise in quantum computers, the interest in multipartite open quantum systems has recently risen. A dissipative collective effect may be defined as the coherent interference of the emissions (and/or absorptions) of many quantum particles interacting with external environments. Multipartite open quantum systems are open systems made of multiple subsystems, which can interact with each other and at the same time may be coupled to local and/or collective environments. The characterization and simulation of the dynamics of multipartite open quantum systems is the topic of this doctoral dissertation. The thesis addresses methodological questions, phenomenological predictions, and also presents an experimental implementation on a quantum computer. These contributions include the description and characterization of a general master equation for Markovian multipartite open quantum systems, and some new procedures for the analog and digital quantum simulation thereof.&nbsp; Jury:&nbsp;Anna Sanpera (UAB, Spain),&nbsp;Paolo Muratore (University of Helsinki, Finland), John Goold (Trinity College Dublin, Ireland) Supervisors:&nbsp; S. Maniscalco, R. Zambrini, G.L. Giorgi, M.A.C. Rossi Presential in the&nbsp; IFISC seminar room with parallel Zoom stream at https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 &nbsp; &nbsp; Url event:https://ifisc.uib-csic.es/en/events/seminars/characterization-and-simulation-of-multipartite-op/

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PhD Thesis Defense on Friday, Feb 24, 2023 at 11:00
by semfis＠ifisc.uib-csic.es 13 Feb '23

13 Feb '23

PhD Thesis Defense on Friday Feb 24, 2023 at 11:00 Place: IFISC Seminar Room Title: Characterization and simulation of multipartite open quantum systems Speaker: Marco Cattaneo, Algorithmiq (Helsinki, Finland), PhD student of UIB (IFISC) and the University of Helsinki Abstract: Motivated by renewed studies on dissipative collective effect and by new discoveries about the features of noise in quantum computers, the interest in multipartite open quantum systems has recently risen. A dissipative collective effect may be defined as the coherent interference of the emissions (and/or absorptions) of many quantum particles interacting with external environments. Multipartite open quantum systems are open systems made of multiple subsystems, which can interact with each other and at the same time may be coupled to local and/or collective environments. The characterization and simulation of the dynamics of multipartite open quantum systems is the topic of this doctoral dissertation. The thesis addresses methodological questions, phenomenological predictions, and also presents an experimental implementation on a quantum computer. These contributions include the description and characterization of a general master equation for Markovian multipartite open quantum systems, and some new procedures for the analog and digital quantum simulation thereof.&nbsp; Jury:&nbsp;Anna Sanpera (UAB, Spain),&nbsp;Paolo Muratore (University of Helsinki, Finland), John Goold (Trinity College Dublin, Ireland) Supervisors:&nbsp; S. Maniscalco, R. Zambrini, G.L. Giorgi, M.A.C. Rossi Presential in the&nbsp; IFISC seminar room with parallel Zoom stream at https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 &nbsp; &nbsp; Url event:https://ifisc.uib-csic.es/en/events/seminars/characterization-and-simulation-of-multipartite-op/

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Reminder: Master Thesis, TODAY - Friday, Feb 10, 2023 at 15:00
by semfis＠ifisc.uib-csic.es 10 Feb '23

10 Feb '23

Master Thesis on Friday Feb 10, 2023 at 15:00 Place: IFISC Seminar Room Title: Local probing of dynamical phase transitions by repeated partial information erasure Speaker: Hira Ali, IFISC Abstract: In this Master&#39;s Thesis, I will be discussing a new approach to probing the dynamical phases of an isolated quantum many-body system represented by a spin complex network. The protocol is based on local measurements of quantum observables and finding out if they display the convergence property or not. The results showed that the ability of a system to erase previous information with time depends critically on its dynamic phase. As a consequence, this probing method allows one to distinguish between ergodic and localized phases of matter.&nbsp; Supervisors: Gian Luca Giorgi and Roberta Zambrini Jury: Miguel C. Soriano, GIan Luca Giorgi, Gonzalo Manzano &nbsp; Presential at the IFISC seminar room, with parallel zoom streaming&nbsp; https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/local-probing-of-dynamical-phase-transitions-by-re/

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Reminder: Talk, TODAY - Thursday, Feb 09, 2023 at 12:00
by semfis＠ifisc.uib-csic.es 09 Feb '23

09 Feb '23

Talk on Thursday Feb 09, 2023 at 12:00 Place: IFISC Seminar Room Title: Information ecosystems: an ecological approach to computational social science Speaker: Violeta Calleja, IFISC (CSIC-UIB) Abstract: Abstract:&nbsp; Understanding human interactions in online communications is of paramount importance for our society. Alarming phenomena such as the spreading of fake news or the formation of echo chambers can emerge in unhealthy communication environments and, ultimately, undermine the democratic discourse. In this context, among many,&nbsp; two issues challenge the health of our information ecosystems: first, being able to identify their universal characteristics; and second, unveiling the individual drivers that give rise to collective attention. Here, following a recently proposed analogy between natural and information ecosystems, we explore these two challenges. We will present universal patterns that arise in very different discussions of online social networks,&nbsp; and we will continue explaining how our communication dynamics are shaped by the competition for attention in these online social networks and the strategies adopted by the users to maximize their visibility. Url event:https://ifisc.uib-csic.es/en/events/seminars/information-ecosystems-an-ecological-approach-to-c/

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Talk on Friday, Feb 10, 2023 at 15:00
by semfis＠ifisc.uib-csic.es 08 Feb '23

08 Feb '23

Talk on Friday Feb 10, 2023 at 15:00 Place: IFISC Seminar Room Title: Local probing of dynamical phase transitions by repeated partial information erasure Speaker: Hira Ali, IFISC Abstract: In this Master&#39;s Thesis, I will be discussing a new approach to probing the dynamical phases of an isolated quantum many-body system represented by a spin complex network. The protocol is based on local measurements of quantum observables and finding out if they display the convergence property or not. The results showed that the ability of a system to erase previous information with time depends critically on its dynamic phase. As a consequence, this probing method allows one to distinguish between ergodic and localized phases of matter.&nbsp; Supervisors: Gian Luca Giorgi and Roberta Zambrini Jury: Miguel C. Soriano, GIan Luca Giorgi, Gonzalo Manzano &nbsp; Presential at the IFISC seminar room, with parallel zoom streaming&nbsp; https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/local-probing-of-dynamical-phase-transitions-by-re/

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Reminder: IFISC Seminar, TODAY - Wednesday, Feb 08, 2023 at 14:30
by semfis＠ifisc.uib-csic.es 08 Feb '23

08 Feb '23

IFISC Seminar on Wednesday Feb 08, 2023 at 14:30 Place: IFISC Seminar Room Title: The faster, the better: How to accelerate photonic computing to meet the requirements of optical transmission systems Speaker: Irene Estébanez, IFISC Abstract: Photonic reservoir computing is an information processing technique that uses the dynamical response of semiconductor lasers to injected data to perform complex computations. Depending on the task, this approach might offer several benefits over traditional electronic computing, including faster processing speed, greater energy efficiency, and improved performance. Here, we will focus on the application of photonic reservoir computing in the real-world task of optical signal recovery and time series prediction. Based on numerical and experimental results, we demonstrate how bandwidth enhancement can be leveraged to further increase processing speed. Presential in the IFISC seminar room, Zoom stream at: https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/the-faster-the-better-how-to-accelerate-photonic-c/

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Reminder: IFISC Seminar, TODAY - Tuesday, Feb 07, 2023 at 14:30
by semfis＠ifisc.uib-csic.es 07 Feb '23

07 Feb '23

IFISC Seminar on Tuesday Feb 07, 2023 at 14:30 Place: IFISC Seminar Room Title: Modeling a minimal thermal diode Speaker: Celia Anteneodo , Department of Physics, PUC-Rio, Rio de Janeiro, Brazil Abstract: The phenomenon of heat rectification on a chain of particles has been studied for decades as it may guide the creation of thermal diodes. To start tackling the immense complexity involved, we consider a system consisting of two interacting classical particles, each one subject to a Langevin thermal bath and to an on-site potential. We explore the conditions under which the diode effect emerges when inverting the temperature difference. For weak nonlinear forces, we obtain an analytical expression for the heat current that can be established through the system under a temperature gradient. Even simple, this two-particle diode allows to foresee the distinct roles that diverse types of nonlinearity and asymmetry play in thermal rectification of larger systems. Presential in the IFISC seminar room, Zoom stream at: https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/modeling-a-minimal-thermal-diode/

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Reminder: PhD Thesis Defense, TODAY - Monday, Feb 06, 2023 at 10:00
by semfis＠ifisc.uib-csic.es 06 Feb '23

06 Feb '23

PhD Thesis Defense on Monday Feb 06, 2023 at 10:00 Place: IFISC Seminar Room Title: PhD Thesis Defense - Electronic and topological properties of bilayer graphene nanostructures Speaker: Nassima Benchtaber, IFISC (UIB-CSIC) Abstract: Jury: Pilar L&oacute;pez-Sancho (ICMM-CSIC), Francisco Dom&iacute;nguez-Adame (UCM) and Michael Moskalets (IFISC) Advisors: Lloren&ccedil; Serra and David S&aacute;nchez Presential in the seminar room with parallel Zoom stream at https://uibuniversitat.zoom.us/j/91884192262 Url event:https://ifisc.uib-csic.es/en/events/seminars/phd-thesis-defense-electronic-and-topological-prop/

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PhD Thesis Defense on Monday, Feb 06, 2023 at 10:00
by semfis＠ifisc.uib-csic.es 03 Feb '23

03 Feb '23

PhD Thesis Defense on Monday Feb 06, 2023 at 10:00 Place: IFISC Seminar Room Title: PhD Thesis Defense - Electronic and topological properties of bilayer graphene nanostructures Speaker: Nassima Benchtaber, IFISC (UIB-CSIC) Abstract: Jury: Pilar L&oacute;pez-Sancho (ICMM-CSIC), Francisco Dom&iacute;nguez-Adame (UCM) and Michael Moskalets (IFISC) Advisors: Lloren&ccedil; Serra and David S&aacute;nchez Presential in the seminar room with parallel Zoom stream at https://uibuniversitat.zoom.us/j/91884192262 Url event:https://ifisc.uib-csic.es/en/events/seminars/phd-thesis-defense-electronic-and-topological-prop/

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IFISC Seminar on Tuesday, Feb 07, 2023 at 14:30
by semfis＠ifisc.uib-csic.es 03 Feb '23

03 Feb '23

IFISC Seminar on Tuesday Feb 07, 2023 at 14:30 Place: IFISC Seminar Room Title: Modeling a minimal thermal diode Speaker: Celia Anteneodo , Department of Physics, PUC-Rio, Rio de Janeiro, Brazil Abstract: The phenomenon of heat rectification on a chain of particles has been studied for decades as it may guide the creation of thermal diodes. To start tackling the immense complexity involved, we consider a system consisting of two interacting classical particles, each one subject to a Langevin thermal bath and to an on-site potential. We explore the conditions under which the diode effect emerges when inverting the temperature difference. For weak nonlinear forces, we obtain an analytical expression for the heat current that can be established through the system under a temperature gradient. Even simple, this two-particle diode allows to foresee the distinct roles that diverse types of nonlinearity and asymmetry play in thermal rectification of larger systems. Presential in the IFISC seminar room, Zoom stream at&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/modeling-a-minimal-thermal-diode/

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