April 2024 - Materia-seminarios

QuThCo SEMINAR: An overview of Quantum contextuality and some related topics
by Michalis Skotiniotis 23 Apr '24

23 Apr '24

El grupo de Termodinámica y Computación Cuántica les invita al siguiente seminario Fecha: Viernes 26 de Abril Hora: 11:00 am Lugar: Laboratorio de Fïsica Computacional, Dept de Electromagnetismo y Física de al Materia, Planta Baja, Facultad de Ciencias (junto al péndulo gigante) Ponente: Giulio Camillo (Universidad de Granada) Titulo: An overview of quantum contextuality and some related topics Resumen: Contextuality can be seen as a purely non-classical phenomenon in physical systems, its quantum realizations being of special interest. We have been presencing an ongrowing attention to it in the recent years, from a proper experimental verification that led to a Nobel Prize to its roles on the foundational aspects of quantum theory and on the exploration of quantum versions of communication and computation schemes. In this seminar I am going to give an introduction to the phenomenon, in the traditional approach, and talk about its characterization and some of the associated challenges and applications, as well as connections to other areas, including quantum computing. El seminario es accesible para los estudiantes de grado, a los que recomendamos encarecidamente que asistan. Para aquellos que no puedan asistir, también hemos configurado una reunión de Google donde el seminario se transmitirá en vivo. meet.google.com/pfu-awyh-hmz También os recordamos a todos la página web del Seminario de Grupos, https://ic1.ugr.es/eventos/wp/qjc/ donde se publicarán anuncios pasados, presentes y futuros. Nos vemos a todos allí DJM ________________________________________________________________________________ Dear all The Quantum Thermodynamics and Computation group cordially invites you to the following seminar Date: Friday 26 of Arpil Time: 11:00 am Location: Computational Physics Laboratory, Department of Electromagnetism and Condensed Mater, Ground Floor, Faculty of Science (next to the giant pendulum) Speaker: Giulio Camillo (Universidad de Granada) Title: An overview of quantum contextuality and some related topics Abstract: Contextuality can be seen as a purely non-classical phenomenon in physical systems, its quantum realizations being of special interest. We have been presencing an ongrowing attention to it in the recent years, from a proper experimental verification that led to a Nobel Prize to its roles on the foundational aspects of quantum theory and on the exploration of quantum versions of communication and computation schemes. In this seminar I am going to give an introduction to the phenomenon, in the traditional approach, and talk about its characterization and some of the associated challenges and applications, as well as connections to other areas, including quantum computing. The seminar is (is not) accessible to undergraduate students, whom we strongly encourage to attend. For those of you unable to attend the seminar, we have set-up the following google meet link for the upcoming seminar. meet.google.com/pfu-awyh-hmz We would also like to bring to your attention the groups seminar page https://ic1.ugr.es/eventos/wp/qjc/ where you can find relevant material and information about past, present, and future seminars. See you all there DJM. --------------------------------------------------------- Dr. Michalis Skotiniotis Grupo de Termodinámica y Información Cuántica. Departamento de Electromagnetismo y Física de la Materia. Instituto Carlos I de Física Teórica y Computacional. Facultad de Ciencias, Av. Fuentenueva s/n Universidad de Granada Granada, 18071 Spain Email: mskotiniotis(a)onsager.ugr.es ---------------------------------------------------------

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SEMINAR: Quantum Thermodynamics and Computation Group---Antonio Ruiz-Molero
by Michalis Skotiniotis 09 Apr '24

09 Apr '24

El grupo de Termodinámica y Computación Cuántica les invita al siguiente seminario Fecha: Viernes 12 de Abril Hora: 10:00 am Lugar: Laboratorio de Fïsica Computacional, Dept de Electromagnetismo y Física de al Materia, Planta Baja, Facultad de Ciencias (junto al péndulo gigante) Ponente: Antonio Ruiz-Molero (INL Braga) Titulo: Estimation of environmental parameters in open quantum systems using Bayesian learning. Application to quantum dots. Resumen: In open quantum dynamics, the structure of the environment determines the way a system loses its coherence. In this seminar, we show how to use a Bayesian learning protocol to infer properties of the environment from experimental data. Specifically, we estimate a set of scalar parameters of the spectral density of the bath that interacts with a quantum dot via exciton-phonon interaction in the weak coupling regime, using simulated data. We will compare offline and online protocols and their performance. For those without a background in the topic, we will review concepts on the theory of open quantum systems, quantum metrology, quantum process tomography, and parameter estimation. El seminario es accesible para los estudiantes de grado, a los que recomendamos encarecidamente que asistan. Para aquellos que no puedan asistir, también hemos configurado una reunión de Google donde el seminario se transmitirá en vivo. http://meet.google.com/pfu-awyh-hmz También os recordamos a todos la página web del Seminario de Grupos, https://ic1.ugr.es/eventos/wp/qjc/ donde se publicarán anuncios pasados, presentes y futuros. Nos vemos a todos allí DJM ________________________________________________________________________________ Dear all The Quantum Thermodynamics and Computation group cordially invites you to the following seminar Date: Friday 12th April Time: 10:00 am Location: Computational Physics Laboratory, Department of Electromagnetism and Condensed Mater, Ground Floor, Faculty of Science (next to the giant pendulum) Speaker: Antonio Ruiz-Molero (INL Braga) Title: Estimation of environmental parameters in open quantum systems using Bayesian learning. Application to quantum dots. Abstract: In open quantum dynamics, the structure of the environment determines the way a system loses its coherence. In this seminar, we show how to use a Bayesian learning protocol to infer properties of the environment from experimental data. Specifically, we estimate a set of scalar parameters of the spectral density of the bath that interacts with a quantum dot via exciton-phonon interaction in the weak coupling regime, using simulated data. We will compare offline and online protocols and their performance. For those without a background in the topic, we will review concepts on the theory of open quantum systems, quantum metrology, quantum process tomography, and parameter estimation. The seminar is accessible to undergraduate students, whom we strongly encourage to attend. For those of you unable to attend the seminar, we have set-up the following google meet link for the upcoming seminar. http://meet.google.com/pfu-awyh-hmz We would also like to bring to your attention the groups seminar page https://ic1.ugr.es/eventos/wp/qjc/ where you can find relevant material and information about past, present, and future seminars. See you all there DJM. --------------------------------------------------------- Dr. Michalis Skotiniotis Grupo de Termodinámica y Información Cuántica. Departamento de Electromagnetismo y Física de la Materia. Instituto Carlos I de Física Teórica y Computacional. Facultad de Ciencias, Av. Fuentenueva s/n Universidad de Granada Granada, 18071 Spain Email: mskotiniotis(a)onsager.ugr.es ---------------------------------------------------------

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SEMINAR: Quantum Thermodynamics and Computation group---Simon Morelli
by Michalis Skotiniotis 03 Apr '24

03 Apr '24

El grupo de Termodinámica y Computación Cuántica les invita al siguiente seminario Fecha: Viernes 5/4/2024 Hora: 11:00 am Lugar: Laboratorio de Fïsica Computacional, Dept de Electromagnetismo y Física de al Materia, Planta Baja, Facultad de Ciencias (junto al péndulo gigante) Ponente: Simon Morelli (Basque Centre for Applied Mathematics) Titulo: Correlation constraints and the Bloch geometry of two qubits Resumen: The quantum marginal problem investigates the compatibility of the eigenvalues of the local and global states of a multipartite quantum system. It is a fundamental problem in quantum information for which the solution is only known for simple cases. We investigate a simpler question of the same flavour: Given the purities of the local states of a multipartite system, what is the maximum purity the global state can achieve? We derive a new inequality that holds for bipartite systems of arbitrary dimensions and gives a complete solution for two qubits. Together with previous findings, this result gives rise to a new representation of the quantum state space – the Bloch ball – of two qubits. We show that this 3-dimensional visualization has various interesting properties regarding geometry and argue why it indeed captures many relevant properties of the full, high-dimensional, state space. Finally we extend this solution to three-qubit states, where we derive tight inequalities on the two- and three-body correlations compatible with a pure state. El seminario es accesible para los estudiantes de grado, a los que recomendamos encarecidamente que asistan. Para aquellos que no puedan asistir, también hemos configurado una reunión de Google donde el seminario se transmitirá en vivo. https://meet.google.com/pfu-awyh-hmz También os recordamos a todos la página web del Seminario de Grupos, https://ic1.ugr.es/eventos/wp/qjc/ donde se publicarán anuncios pasados, presentes y futuros. Nos vemos a todos allí DJM ________________________________________________________________________________ Dear all The Quantum Thermodynamics and Computation group cordially invites you to the following seminar Date: Friday 5/4/2024 Time: 11:00 am Location: Computational Physics Laboratory, Department of Electromagnetism and Condensed Mater, Ground Floor, Faculty of Science (next to the giant pendulum) Speaker: Simon Morelli (Basque Centre for Applied Mathematics) Title: Correlation constraints and the Bloch geometry of two qubits Abstract: The quantum marginal problem investigates the compatibility of the eigenvalues of the local and global states of a multipartite quantum system. It is a fundamental problem in quantum information for which the solution is only known for simple cases. We investigate a simpler question of the same flavour: Given the purities of the local states of a multipartite system, what is the maximum purity the global state can achieve? We derive a new inequality that holds for bipartite systems of arbitrary dimensions and gives a complete solution for two qubits. Together with previous findings, this result gives rise to a new representation of the quantum state space – the Bloch ball – of two qubits. We show that this 3-dimensional visualization has various interesting properties regarding geometry and argue why it indeed captures many relevant properties of the full, high-dimensional, state space. Finally we extend this solution to three-qubit states, where we derive tight inequalities on the two- and three-body correlations compatible with a pure state. The seminar is accessible to undergraduate students, whom we strongly encourage to attend. For those of you unable to attend the seminar, we have set-up the following google meet link for the upcoming seminar. https://meet.google.com/pfu-awyh-hmz We would also like to bring to your attention the groups seminar page    https://ic1.ugr.es/eventos/wp/qjc/   where <https://ic1.ugr.es/eventos/wp/qjc/%E2%80%A8%C2%A0%E2%80%A8where> you can find relevant material and information about past, present, and future seminars. See you all there DJM. --------------------------------------------------------- Dr. Michalis Skotiniotis Grupo de Termodinámica y Información Cuántica. Departamento de Electromagnetismo y Física de la Materia. Instituto Carlos I de Física Teórica y Computacional. Facultad de Ciencias, Av. Fuentenueva s/n Universidad de Granada Granada, 18071 Spain Email: mskotiniotis(a)onsager.ugr.es ---------------------------------------------------------

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SEMINAR: Quantum Termodynamics and Computation Group, Simon Morelli
by mskotiniotis＠ugr.es 03 Apr '24

03 Apr '24

El grupo de Termodinámica y Computación Cuántica les invita al siguiente seminario Fecha: Viernes 5/4/2024 Hora: 11:00 am Lugar: Laboratorio de Fïsica Computacional, Dept de Electromagnetismo y Física de al Materia, Planta Baja, Facultad de Ciencias (junto al péndulo gigante) Ponente: Simon Morelli (Basque Centre for Applied Mathematics) Titulo: Correlation constraints and the Bloch geometry of two qubits Resumen: The quantum marginal problem investigates the compatibility of the eigenvalues of the local and global states of a multipartite quantum system. It is a fundamental problem in quantum information for which the solution is only known for simple cases. We investigate a simpler question of the same flavour: Given the purities of the local states of a multipartite system, what is the maximum purity the global state can achieve? We derive a new inequality that holds for bipartite systems of arbitrary dimensions and gives a complete solution for two qubits. Together with previous findings, this result gives rise to a new representation of the quantum state space – the Bloch ball – of two qubits. We show that this 3-dimensional visualization has various interesting properties regarding geometry and argue why it indeed captures many relevant properties of the full, high-dimensional, state space. Finally we extend this solution to three-qubit states, where we derive tight inequalities on the two- and three-body correlations compatible with a pure state. El seminario es accesible para los estudiantes de grado, a los que recomendamos encarecidamente que asistan. Para aquellos que no puedan asistir, también hemos configurado una reunión de Google donde el seminario se transmitirá en vivo. https://meet.google.com/pfu-awyh-hmz También os recordamos a todos la página web del Seminario de Grupos, https://ic1.ugr.es/eventos/wp/qjc/ donde se publicarán anuncios pasados, presentes y futuros. Nos vemos a todos allí DJM ________________________________________________________________________________ Dear all The Quantum Thermodynamics and Computation group cordially invites you to the following seminar Date: Friday 5/4/2024 Time: 11:00 am Location: Computational Physics Laboratory, Department of Electromagnetism and Condensed Mater, Ground Floor, Faculty of Science (next to the giant pendulum) Speaker: Simon Morelli (Basque Centre for Applied Mathematics) Title: Correlation constraints and the Bloch geometry of two qubits Abstract: The quantum marginal problem investigates the compatibility of the eigenvalues of the local and global states of a multipartite quantum system. It is a fundamental problem in quantum information for which the solution is only known for simple cases. We investigate a simpler question of the same flavour: Given the purities of the local states of a multipartite system, what is the maximum purity the global state can achieve? We derive a new inequality that holds for bipartite systems of arbitrary dimensions and gives a complete solution for two qubits. Together with previous findings, this result gives rise to a new representation of the quantum state space – the Bloch ball – of two qubits. We show that this 3-dimensional visualization has various interesting properties regarding geometry and argue why it indeed captures many relevant properties of the full, high-dimensional, state space. Finally we extend this solution to three-qubit states, where we derive tight inequalities on the two- and three-body correlations compatible with a pure state. The seminar is accessible to undergraduate students, whom we strongly encourage to attend. For those of you unable to attend the seminar, we have set-up the following google meet link for the upcoming seminar. https://meet.google.com/pfu-awyh-hmz We would also like to bring to your attention the groups seminar page    https://ic1.ugr.es/eventos/wp/qjc/   where you can find relevant material and information about past, present, and future seminars. See you all there DJM.

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