Seminar with Prof. Dr. Antonio Zelaquett Khoury- February 11, 2022 (friday) – 10:15 a.m.

08/02/2022 11:29

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Luz estruturada e emaranhamento

Prof. Dr. Antonio Zelaquett Khoury

Laboratório de Óptica e Informação Quântica – UFF

Abstract:

Neste colóquio discutiremos como os conceitos de informação quântica servem à descrição de configurações interessantes do campo ótico naquilo que hoje denominamos “luz estruturada”. A combinação de diferentes graus de liberdade da luz permite estabelecermos uma equivalência formal entre configurações estruturadas do campo eletromagnético e os estados emaranhados da mecânica quântica. Para além de uma mera equivalência formal, este paralelo inspira novas abordagens dos fenômenos óticos envolvendo os momentos angulares de spin e orbital da luz, bem como novas formas de combinar estas grandezas em processos não lineares. Este tema tem se revelado muito fértil, sendo a base do trabalho de diversos grupos de pesquisa internacionais, além de compor um cenário de cooperação científica entre diferentes grupos no Brasil.

Date: February 11, 2022 – (friday) – Time: 10:15 a.m.

link to access the youtube channel: https://youtu.be/AJmpp05NOq0

Approval of applications to the Admission Process 2022/1

01/02/2022 17:00

The Graduate Program in Physics of the Federal University of Santa Catarina – UFSC – announces the list of the approved applications to the Admission Process for entrance at semester 2022/1.

Click here and have access to the registered candidates list and their respective situation in the admission process.

Appeals about the registration must be sent from February 2, 2022 to February 7, 2022 5 pm.

Doctoral Thesis defence of Diego Fernando Silva Sousa – December 14, 2021 – tuesday – Times: 2:00 pm

03/12/2021 16:09

The Physics Graduate Program invites everyone to:

 Defense of Doctoral Thesis

 Diego Fernando Silva Sousa

CHARACTERIZATION OF THE P3HT:COPC DONOR BLEND FOR APPLICATIONS IN PHOTOVOLTAIC DEVICES

 

Defense Committee:

Prof. Dr. Ivan Helmuth Bechtold – (president) – (UFSC/FSC)

Prof. Dr. Roberto Mendonça Faria – (external member) – IFUSP/São Carlos

Prof. Dr. Douglas José Coutinho – (supplementary member) –  UTFPR

Profª. Drª. Françoise Toledo Reis – (membro titular) – UFSC/FSC

Prof. Dr. Leonardo Negri Furini – (201600671) – UFSC/FSC

Profª. Drª. Marta Elisa Rosso Dotto – (supplementary member) – UFSC/FSC

Profª. Drª. Juliana Eccher – (supplementary member)- UFSC/FSC

Date: December 14, 2021tuesday – Times: 2:00 pm – Place: sala virtual da Conferência Web da Rede Nacional de Ensino e Pesquisa (RNP)

Virtual room access link: https://conferenciaweb.rnp.br/webconf/ivan-helmuth

 

Seminar with PhD Nara Rubiano da Silva- December 3, 2021 (friday) – 10:15 a.m.

30/11/2021 08:30

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Structured light for computation and light conversion

PhD Nara Rubiano da Silva

Postdoc fellow – GIQSul – UFSC

Abstract:

Structured light displays intricate field distributions (of intensity, phase, polarization) in space, with several emerging applications. In the Quantum Optics Laboratory at UFSC, we study classical and quantum processes utilizing such optical fields. In this talk, I will present two of our recent results in the classical regime. Firstly, we manipulate the phase of light for realizing a computational task, namely, a matrix-by-vector multiplication. Each matrix or vector element is mapped into the tranverse phase distribution of the light beam, and the required operations are realized by optical elements. I will introduce this optical processor and, as an example, its application to an optimization problem called unidimensional Distance Geometry Problem. In a second work, we investigate a fundamental aspect of employing structured beams of the Laguerre-Gauss family in stimulated parametric down-conversion. Specifically, we analyse the selection rules involving the radial order of the resulting LG beams, which I will discuss in my talk.

Date: December 3, 2021 – (friday) – Time: 10:15 a.m.

link to access the youtube channel: https://youtu.be/PHyzke71iHQ

Qualifying Examination for Doctoral Thesis of Carline Biesdorf – December 1st, 2021 – Wednesday – 10:00 am

25/11/2021 15:58

The Physics Graduate Program invites everyone to:

Qualifying Examination for Doctoral Thesis

Carline Biesdorf

 

MODIFIED MIT BAG MODELS AND QCD PHASE DIAGRAMS

                                                                                                                                                  

Defense Committee

 

Profª. Drª. Débora Peres Menezes – (president) – UFSC/FSC

Prof. Dr. Marcelo Dallagnol Alloy – (local member) – UFSC/Blumenau

Prof. Dr. Luiz Laércio Lopes – (external member) – CEFET/MG

Prof. Dr. Celso de Camargo Barros Junior – (local member) – UFSC/FSC

Prof. Dr. Tiago José Nunes da Silva – (local member) – UFSC/FSC

 

Date: December 1st, 2021Wednesday – Time: 10:00 am – Place: por intermédio da plataforma Google Meet

 

Link to access virtual room: https://meet.google.com/reu-rgkr-kct

Seminar with Arthur Alencastro Puls- November 26, 2021 (friday) – 10:15 a.m.

22/11/2021 19:25

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Detailed chrono-chemo-dynamics of seven metal-poor red giants from Kepler

Arthur Alencastro Puls

Research School of Astronomy and Astrophysics, Australian National University

Abstract:

The Kepler mission has yielded a revolution in the field of GalacticArchaeology, with its photometry allowing the determination of stellar parameters with an unprecedented level of precision for Red Giant stars. Recent studies have shown that a few of these objects display conflicting characteristics in the age-metallicity space (e.g., young and metal-poor). In this project we combine asteroseismic information from solar-like oscillations, high-resolution spectroscopy and Gaia astrometry to derive stellar ages, chemical abundances and kinematics for a group of metal-poor Red Giants, and characterise them in a multidimensional chrono-chemo-dynamical space. Our results suggest that underestimated parallax errors make the effect of Gaia parallaxes more important than different choices of model grid or – in the case of stars ascending the RGB – mass-loss prescription. Two stars are identified as potentially evolved halo blue stragglers. Four objects are likely members of the accreted Milky Way halo, and their possible relationship with known accretion events, such as Gaia-Sausage and Gaia-Sequoia, is discussed.

Date: November 26, 2021 – (friday) – Time: 10:15 a.m.

link to access the youtube channel: https://youtu.be/D1pIcDUoHds

Seminar with Prof. Dr. Raphael Ribeiro- November 19, 2021 (friday) – 10:15 a.m.

16/11/2021 12:55

THE PHYSICS GRADUATE PROGRAM invites everyone to the seminar:

Chemistry in optical microcavities: Spectral fluctuations and energy transport

Prof. Dr. Raphael Ribeiro

Department of Chemistry, Emory University – Atlanta, USA

Abstract:

Optical cavities and metallic nanoparticles confine electromagnetic fields and enable new pathways to control physicochemical processes via strong light-matter interactions. In fact, recent experiments have shown that photonic and plasmonic materials may induce significant and sometimes unexpected changes to physical properties and reactivity of molecular systems. In this talk, I will introduce and present the key results of our recent theoretical investigations on the effects of collective radiation-matter interactions on transport and spectral properties of disordered molecular ensembles hosted by a resonant 1D optical cavity (photonic wire). The main implications of our findings to future theoretical and experimental research will be discussed. I will show that widely employed minimal theoretical models fail to adequately describe photonic effects on the local properties of chemical systems and explain strategies to maximize the influence of optical cavities on molecular materials informed by our simulations.

Date: November 19, 2021 – (friday) – Time: 10:15 a.m.

link to access the youtube channel: https://youtu.be/8nV3QDFmhB8

Seminar with Prof. Dr. Emanuele Orgiu- November 12, 2021 (friday) – 10:15 a.m.

08/11/2021 15:42

THE PHYSCIS GRADUATE PROGRAM invites everyone to the seminar:

What Hampers Electron Transport in Organic Crystals? A Close Look at Band-like Transport in N-type Organic Semiconductors

Prof. Dr. Emanuele Orgiu

Institut National de la Recherche Scientifique – INRS, Québec – Canada

Abstract:

Charge transport in organic semiconductors is notoriously sensitive to the presence of disorder, both intrinsic and extrinsic, especially for n-type materials. Intrinsic dynamic disorder stems from large thermal fluctuations both in intermolecular transfer integrals and (molecular) site energies in weakly interacting van der Waals solids and sources transient localization of the charge carriers. The molecular vibrations that drive transient localization typically operate at low-frequency (< a-few-hundred cm-1), which makes it difficult to assess them experimentally. Hitherto, this has prevented the identification of clear molecular design rules to control and reduce dynamic disorder. In addition, the disorder can also be extrinsic, being controlled by the chemical and physical “coupling” of the π-conjugated core to the gate dielectric. During the Colloquium, I will present a comprehensive study of charge transport in two closely related n-type molecular organic semiconductors using a combination of temperature-dependent inelastic neutron scattering and photoelectron spectroscopy corroborated by electrical measurements, theory and simulations. By doing so, unambiguous evidence is provided that ad hoc molecular design enables to free the electron charge carriers from both intrinsic and extrinsic disorder to ultimately reach band-like electron transport.

Date: November 12, 2021 – (friday) – Time: 10:15 a.m.

link to access the youtube channel: https://youtu.be/TE3LD1NKi4c

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