Conveners
Quantum Materials and Quantum Technologies
- Pedro Ribeiro
Description
https://videoconf-colibri.zoom.us/j/87872459662?pwd=Sm5ucGlPWWJOckV6N1BNT255THgvUT09
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Gleb Kakazei24/09/2021, 09:00Quantum Materials and Quantum TechnologiesRegular talk
Please see the attached file
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Ana S. Silva (IFIMUP/DFA - FCUP)24/09/2021, 09:10Quantum Materials and Quantum TechnologiesRegular talk
Since the first demonstration of the possibility of manipulating the magnetization using femtosecond (fs) laser pulses performed by Beaurepaire et al. in 1996 [1], time-resolved pump-probe measurements based on the magneto-optical Kerr or Faraday effects have provided an invaluable tool for the study of ultrafast magnetic dynamics in many relevant systems [2]. Although rapid advances in...
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Ulrich Wahl (Universidade de Lisboa (PT))24/09/2021, 09:20Quantum Materials and Quantum TechnologiesRegular talk
Colour centers in diamond are in the focus of interest as single
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photon emitters for quantum (Q) technologies. Q metrology has
already been demonstrated using the nitrogen-vacancy NV− center,
which has the crystal symmetry C3. However, defects with
D3d mirror symmetry, such as the group IV centers [1] SiV,
GeV, SnV and PbV, but also MgV, show optical properties superior
to... -
Sandra Rabaca24/09/2021, 09:30Quantum Materials and Quantum TechnologiesRegular talk
During the last few years a new paradigm of 2D conductors based on molecular bilayers, rather than on single layers, has emerged in a series of charge transfer salts based on the organic donor CNB-EDT-TTF (5-cyanobenzene-ethylenedithio-tetrathiafulvalene)[1], with different small anions A (I3−, ClO4−, BF4−, ReO4−, PF6– and SbF6−, AsF6−, AuI2−, I2Br−, etc…), with general formula (CNB-EDT-TTF)4A...
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Prof. Miguel A. N. Araújo (CeFEMA)24/09/2021, 09:40Quantum Materials and Quantum TechnologiesRegular talk
It is shown that the presence of discrete symmetries in Floquet systems connected to metallic reservoirs imprints a definite parity on the charge and heat pumping as a function of the reservoir's chemical potential, $\mu$. In particular, when particle-hole symmetry (PHS) holds, the pumping of charge (heat) is an odd (even) function of $\mu$. Whereas, if only the product of PHS and parity...
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Miguel Gonçalves (Cefema, Instituto Superior Técnico, Universidade de Lisboa)24/09/2021, 09:50Quantum Materials and Quantum TechnologiesRegular talk
We studied the localization properties of electrons in incommensurate twisted bilayer graphene, for twist angles encompassing the narrow-band regime, by numerically exact means.
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Incommensurability effects were found to induce states with sub-ballistic properties in the narrow-band regime. These states are delocalized in momentum-space and follow non-Poissonian level statistics, in contrast... -
João Pedro dos Santos Pires24/09/2021, 10:00Quantum Materials and Quantum TechnologiesRegular talk
Most of our knowledge on the quantum physics of electrons in crystalline matter is based on Bloch’s Theorem [1]. This important result states that electrons move like plane-waves across any spatially periodic potential and forms the basis of the electronic band theory of solids. Despite its success in explaining most properties observed in real-life conductors and semi- conductors, exceptional...
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Bruno Amorim (Universidade do Minho)24/09/2021, 10:10Quantum Materials and Quantum TechnologiesRegular talk
Abstract: The description of several light-matter interaction phenomena at the nanoscale requires a quantum description of the electromagnetic field. This task is complicated when the electromagnetic field does not exist in a vacuum, but permeates a dielectric medium. In this case, the photons of the electromagnetic field couple to the dielectric degrees of freedom, giving origin to hybrid...
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Miguel Oliveira (Instituto Superior Técnico)24/09/2021, 10:20Quantum Materials and Quantum TechnologiesFlash talk
In this poster we address the problem of detecting phase transitions without prior knowledge of a suitable order parameter. To this end, we propose a notion of metric based on the distance between single-particle covariance matrices. Unlike the well-known fidelity susceptibility, this quantity is accessible to commonly employed numerical techniques and can potentially serve as a versatile...
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José Diogo Costa Guimarães (University of Minho)24/09/2021, 10:25Quantum Materials and Quantum TechnologiesFlash talk
In this poster, we will explore the principles of quantum digital simulation of the time evolution of quantum systems.
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