- semfis - Mailing lists@ IFISC

Reminder: Talk, TODAY - Friday, May 05, 2023 at 11:00
by semfis＠ifisc.uib-csic.es 05 May '23

05 May '23

Talk on Friday May 05, 2023 at 11:00 Place: IFISC Seminar Room Title: Quantum Fisher Information and its dynamical nature Speaker: Matteo Scandi, ICFO Abstract: MdM Quantum Meeting The importance of the quantum Fisher information metric is testified by the number of applications that this has in very different fields, ranging from hypothesis testing to metrology, passing through thermodynamics. In this presentation, after a small technical introduction of the family of quantum Fisher information, I&#39;ll discuss a fact that was overseen in the literature, namely the inherently dynamical nature of Fisher information. This will be exemplified with three examples: first, the equivalence between positivity of a map and the contraction of Fisher information; second, the possibility of defining Markovianity (CP-divisibility) in the same manner; and finally, the definition of detailed balance as self-adjointness with respect to the Fisher information metric. The reference for the Markovianity part is: <a href="https://arxiv.org/pdf/2204.04072.pdf" target="_blank">https://arxiv.org/pdf/2204.04072.pdf</a>… Url event:https://ifisc.uib-csic.es/en/events/seminars/quantum-fisher-information-and-its-dynamical-natur/

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Talk on Friday, May 05, 2023 at 11:00
by semfis＠ifisc.uib-csic.es 28 Apr '23

28 Apr '23

Talk on Friday May 05, 2023 at 11:00 Place: IFISC Seminar Room Title: Quantum Fisher Information and its dynamical nature Speaker: Matteo Scandi, ICFO Abstract: MdM Quantum Meeting The importance of the quantum Fisher information metric is testified by the number of applications that this has in very different fields, ranging from hypothesis testing to metrology, passing through thermodynamics. In this presentation, after a small technical introduction of the family of quantum Fisher information, I&#39;ll discuss a fact that was overseen in the literature, namely the inherently dynamical nature of Fisher information. This will be exemplified with three examples: first, the equivalence between positivity of a map and the contraction of Fisher information; second, the possibility of defining Markovianity (CP-divisibility) in the same manner; and finally, the definition of detailed balance as self-adjointness with respect to the Fisher information metric. The reference for the Markovianity part is: <a href="https://arxiv.org/pdf/2204.04072.pdf" target="_blank">https://arxiv.org/pdf/2204.04072.pdf</a>… Url event:https://ifisc.uib-csic.es/en/events/seminars/quantum-fisher-information-and-its-dynamical-natur/

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Reminder: Talk, TODAY - Thursday, Apr 27, 2023 at 15:00
by semfis＠ifisc.uib-csic.es 27 Apr '23

27 Apr '23

Talk on Thursday Apr 27, 2023 at 15:00 Place: IFISC Seminar Room Title: Modelling and dynamics of the CA3 and CA1 hippocampal circuit Speaker: Jaime Sánchez Claro, IFISC Abstract: &nbsp; <quillbot-extension-portal></quillbot-extension-portal> Url event:https://ifisc.uib-csic.es/en/events/seminars/modelling-and-dynamics-of-the-ca3-and-ca1-hippocam/

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Reminder: Talk, TODAY - Thursday, Apr 27, 2023 at 11:00
by semfis＠ifisc.uib-csic.es 27 Apr '23

27 Apr '23

Talk on Thursday Apr 27, 2023 at 11:00 Place: IFISC Seminar Room Title: Constructive effects of squeezing in loop-based quantum photonic architectures for quantum reservoir computing Speaker: Jorge García, IFISC Abstract: MdM Quantum Meeting Squeezing (field fluctuations below shot noise) is a quantum phenomenon that has proven to be key to several quantum technologies. In this talk, we will introduce quantum reservoir computing (QRC) based on an optical platform with a cavity to guarantee the presence of memory. We have studied the benefits of squeezing provided by a nonlinear crystal inside the cavity for time series processing. Concretely, we show that increasing the squeezing improves the reservoir robustness to readout noise. This enhances its accessible memory, which increases the performance in several benchmark tasks. Url event:https://ifisc.uib-csic.es/en/events/seminars/constructive-effects-of-squeezing-in-loop-based-qu/

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Talk on Thursday, Apr 27, 2023 at 11:00
by semfis＠ifisc.uib-csic.es 21 Apr '23

21 Apr '23

Talk on Thursday Apr 27, 2023 at 11:00 Place: IFISC Seminar Room Title: Constructive effects of squeezing in loop-based quantum photonic architectures for quantum reservoir computing Speaker: Jorge García, IFISC Abstract: MdM Quantum Meeting Squeezing (field fluctuations below shot noise) is a quantum phenomenon that has proven to be key to several quantum technologies. In this talk, we will introduce quantum reservoir computing (QRC) based on an optical platform with a cavity to guarantee the presence of memory. We have studied the benefits of squeezing provided by a nonlinear crystal inside the cavity for time series processing. Concretely, we show that increasing the squeezing improves the reservoir robustness to readout noise. This enhances its accessible memory, which increases the performance in several benchmark tasks. Url event:https://ifisc.uib-csic.es/en/events/seminars/constructive-effects-of-squeezing-in-loop-based-qu/

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Reminder: Talk, TODAY - Friday, Apr 21, 2023 at 12:00
by semfis＠ifisc.uib-csic.es 21 Apr '23

21 Apr '23

Talk on Friday Apr 21, 2023 at 12:00 Place: Zoom Seminar Title: Digital Platforms for a Sustainable World Speaker: Bruno Campanelli, IFISC, Sony Lab Rome. Abstract: Among the 17 sustainable development goals defined by the United Nations, the ninth one is to &ldquo;build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation&rdquo;, while the eleventh one is to &ldquo;make cities and human settlements inclusive, safe, resilient and sustainable&rdquo;. Two key factors contributing to a city&rsquo;s living standard are a well-functioning public transportation system, and high availability of services. In this talk I will illustrate two of the projects developed in the ongoing Digital Platforms for a Sustainable World collaboration between Sony Computer Science Laboratories Rome and Sapienza University of Rome. First, I will show&nbsp;how an agent-based approach, using GTFS-Realtime data, can be used to quantify the impact of public transportation delays on accessibility from the passengers&rsquo; point of view, focusing on the public transportation system of Rome . Then, I will present a toolset (relying on OpenStreetMap data) to quantify how close a city is to the 15-minute city ideal proposed by Carlos Moreno. Finally, I will show our in-development online platform that will allow citizens and stakeholders to visualize accessibility metrics and perform case studies. The talk will be online at&nbsp;https://us06web.zoom.us/j/89880998100?pwd=N2sxZVB3eHkrNGZ0N2xOTjhhdEs3QT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/digital-platforms-for-a-sustainable-world/

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Reminder: Talk, TODAY - Tuesday, Mar 28, 2023 at 12:30
by semfis＠ifisc.uib-csic.es 28 Mar '23

28 Mar '23

Talk on Tuesday Mar 28, 2023 at 12:30 Place: Zoom Seminar Title: Computational methods to analyse lexical semantic change and variation from historical texts: my experience so far Speaker: Barbara McGillivray, King's College London Abstract: Over time, new words enter the language, others become obsolete, and existing words acquire new meanings. These phenomena are grounded in a fascinatingly complex mix of cognitive, social, and contextual factors, responding to language contact, emerging circumstances, cultural and socio-political changes, stylistic choices, and different communicative needs. The past decade has seen a growing interest in automatic methods for semantic change (i.e. meaning change) detection from large corpus data, which have made it possible to conduct quantitative studies aimed at detecting broad patterns in the data. Most of these automatic detection methods rely on distributional semantics methods and trace th e computational representation of a corpus-driven word&rsquo;s semantic profile (via vector embeddings) over time to identify if and when a potential change in the semantic profile may have occurred. In this talk I will present my research on developing computational models for semantic change detection in historical texts, particularly on ancient Greek and Latin. McGillivray, B. et al. (2019). A computational approach to lexical polysemy in Ancient Greek, Digital Scholarship in the Humanities, 34: 4. McGillivray, B. et al. (2022). A new corpus annotation framework for Latin diachronic lexical semantics. J . Latin Linguistics, vol. 21, No. 1, pp. 47-105. Talk will be broadcasted at: https://us06web.zoom.us/j/88466865139?pwd=VnFwZXBxZUdHRUpUVkJTM2FVSXc2Zz09 Url event:https://ifisc.uib-csic.es/en/events/seminars/computational-methods-to-analyse-lexical-semantic/

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Talk on Tuesday, Mar 28, 2023 at 12:30
by semfis＠ifisc.uib-csic.es 24 Mar '23

24 Mar '23

Talk on Tuesday Mar 28, 2023 at 12:30 Place: Zoom Seminar Title: Computational methods to analyse lexical semantic change and variation from historical texts: my experience so far Speaker: Barbara McGillivray, King's College London Abstract: Over time, new words enter the language, others become obsolete, and existing words acquire new meanings. These phenomena are grounded in a fascinatingly complex mix of cognitive, social, and contextual factors, responding to language contact, emerging circumstances, cultural and socio-political changes, stylistic choices, and different communicative needs. The past decade has seen a growing interest in automatic methods for semantic change (i.e. meaning change) detection from large corpus data, which have made it possible to conduct quantitative studies aimed at detecting broad patterns in the data. Most of these automatic detection methods rely on distributional semantics methods and trace the computational representation of a corpus-driven word&rsquo;s semantic profile (via vector embeddings) over time to identify if and when a potential change in the semantic profile may have occurred. In this talk I will present my research on developing computational models for semantic change detection in historical texts, particularly on ancient Greek and Latin. McGillivray, B. et al. (2019). A computational approach to lexical polysemy in Ancient Greek, Digital Scholarship in the Humanities, 34: 4. McGillivray, B. et al. (2022). A new corpus annotation framework for Latin diachronic lexical semantics. J. Latin Linguistics, vol. 21, No. 1, pp. 47-105. Talk will be broadcasted at: https://us06web.zoom.us/j/88466865139?pwd=VnFwZXBxZUdHRUpUVkJTM2FVSXc2Zz09 Url event:https://ifisc.uib-csic.es/en/events/seminars/computational-methods-to-analyse-lexical-semantic/

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Reminder: Outreach Event, TODAY - Friday, Mar 24, 2023 at 15:00
by semfis＠ifisc.uib-csic.es 24 Mar '23

24 Mar '23

Outreach Event on Friday Mar 24, 2023 at 15:00 Place: IFISC Seminar Room Title: IFISC X Poster Party Speaker: IFISC PhD students, IFISC (UIB-CSIC) Abstract: The IFISC Poster Party returns in its face-to-face form. An event in which master&#39;s students, doctoral students and postdoctoral researchers will present their research in poster format. In a relaxed atmosphere, you can learn first-hand what young IFISC researchers are working on. This is a great opportunity for undergraduate students to learn what it means to be involved in research, as they will have the chance to speak directly with IFISC researchers themselves. There will be food, drinks, voting and prizes. Url event:https://ifisc.uib-csic.es/en/events/seminars/ifisc-x-poster-party/

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Reminder: Talk, TODAY - Thursday, Mar 16, 2023 at 11:00
by semfis＠ifisc.uib-csic.es 16 Mar '23

16 Mar '23

Talk on Thursday Mar 16, 2023 at 11:00 Place: Zoom Seminar Title: Quantum trajectories of dissipative time-crystals Speaker: Albert Cabot, Institut für Theoretische Physik, Eberhard Karls Universität Tübingen Abstract: MdM Quantum Meeting Recent experiments with dense laser-driven atomic gases [G. Ferioli et&nbsp; al., arXiv:2207.10361 (2022)] have realized a many-body system which in the thermodynamic limit yields a so-called boundary time-crystal. This state of matter is stabilized by the competition between coherent driving and collective dissipation. The aforementioned experiment in principle allows to gain in situ information on the nonequilibrium dynamics of the system by observing the state of the output light field. We show that the photon count signal as well as the homodyne current allow to identify and characterize critical behavior at the time-crystal phase transition. At the transition point the dynamics of the emission signals feature slow drifts, which are interspersed with sudden strong fluctuations. We furthermore show that the time-integrated homodyne current can serve as a useful dynamical order parameter. From this perspective the time-crystal can be viewed as a state of matter in which different oscillation patterns coexist. This talk will be broadcasted at: https://us06web.zoom.us/j/84966714142?pwd=VWxDalJWMFNkWEdBWHBnQWo4R2NtQT09 Url event:https://ifisc.uib-csic.es/en/events/seminars/quantum-trajectories-of-dissipative-time-crystals/

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