Some of my recent transparencies and posters

For my most recent transparencies please see the home page of my group: [link]. (This page is updated periodically.)

[invited] TBA, ICTP-SISSA Advanced Workshop on Quantum Science and Quantum Technologies, Trieste, ICTP, September 11-15, 2017.

How long does it take to obtain a physical density matrix?, New trends on complex quantum system dynamics, Cartagena, 8-12 May 2017. [pdf]

Detecting metrologically useful entanglement in Dicke states, Conference and Working Group meeting of COST CA15220 QTSpace, Malta, 26-31 March, 2017. [pdf]

[invited]
Detecting metrologically useful multiparticle entanglement with few measurements: recent results, Quantum metrology workshop, University of Hannover, Germany, 9-10 February 2017. [pdf]

How long does it take to obtain a physical density matrix?, Wigner Research Centre for Physics, Budapest, Hungary, 26 January 2017. [pdf]

2016

Witnessing metrologically useful multiparticle entanglement, 11th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC2016), Berlin, 27–29 September 2016. [pdf]

Witnessing metrologically useful multiparticle entanglement, Frontiers of Matter Wave Optics (FOMO 2016), Arcachon, France, 10-17 September 2016. [pdf]

Witnessing metrologically useful multipartite entanglement [pdf], ICFO, Barcelona, 12:00, 7 June 2016.

[invited]
Detecting metrologically useful multiparticle entanglement of Dicke states [pdf], Colloquium RTG 1729, University of Hannover, 2 June 2016.

Quantum metrology from a quantum information perspective, 19:00, 27 May 2016, Benasque, Spain.

Participant: Segundo Foro Tecnológico sobre el futuro de las tecnologías cuánticas en Europa, Spanish ERANET/FET Meeting, MINECO, Madrid, 4 May, 2016.

Participant: Primero Foro Tecnológico sobre el futuro de las tecnologías cuánticas en Europa, Spanish ERANET/FET meeting, CDTI, Madrid, 15 March 2016.

[invited] Detecting metrologically useful multiparticle entanglement of Dicke states [pdf], Recent Advances in Quantum Metrology (RAQM 2016), 2-4 March 2016, Warsaw, Poland.

2015

Detecting metrologically useful multiparticle entanglement of Dicke states [pdf], University of Firenze, Italy, 7-11 December 2015.

[invited] Detecting metrologically useful multiparticle entanglement of Dicke states [pdf], 589. Wilhelm and Else Heraeus-Seminar Continuous Variable Entanglement in Atomic Systems: Fundamentals and Applications, Bonn, Germany, 11-15 May, 2015.

Evaluation of convex roof entanglement measures [pdf], Conference of the German Physical Society, Heidelberg, Germany, March 23-27, 2015. (Wed, Mar 25 2015, 12:00-12:15, Q 35.5)

Introduction to quantum information science and quantum computation [pdf], Temas de Física (J.M.M. Senovilla), University of the Basque Country UPV/EHU, Leioa, 23, 26 February, and 2, 5 March, 2015.

Visiting G. Giedke, Donostia International Physics Center (DIPC), San Sebastian, Spain, 10 February 2015.

Introduction to entanglement theory & Detection of multipartite entanglement close to symmetric Dicke states [pdf], Donostia International Physics Center (DIPC), San Sebastian, Spain, 10 February 2015.

Introduction to entanglement theory & Detection of multipartite entanglement close to symmetric Dicke states [pdf], Basque Center for Applied Mathematics (BCAM), Bilbao, Spain, 27 January 2015.

2014

M. Kleinmann and G. Tóth, visiting G. Giedke at DIPC, San Sebastian, Spain, 5 December 2014.
Detection of multipartite entanglement close to symmetric Dicke states [pdf], Conference on Quantum Measurement and Computing (QCMC 2014), Hefei, Anhui, China, 2-6 November 2014.
[invited]
Detection of multipartite entanglement close to symmetric Dicke states [pdf], 7th Italian Quantum Information Science Conference (IQIS2014), Salerno, 15-19 September, 2014.

[organizer]
Entanglement witnesses [pdf], Entanglement Day, Wigner Research Centre for Physics, 4-5 September, Budapest.

[organizer] Quantum metrology from a quantum information science perspective [pdf], Entanglement Day, Wigner Research Centre for Physics, 4-5 September, Budapest.

Visiting
Árpád and Ildikó Csurgay, Péter Pázmány Catholic University, Budapest, 25 August, 2014.

Visiting
D. Petz, Rényi Institute of Mathematics, Budapest, 14 July, 2014.

Introduction to quantum information science and quantum computation (lecture in Spanish, slides in English) [pdf], Temas de Física (J.M.M. Senovilla), University of the Basque Country UPV/EHU, 5-6 May, 2014.

Detection of multipartite entanglement close to symmetric Dicke states [pdf], Conference of the German Physical Society, Berlin, Germany, 17-21 March 2014. (Q 37.4, Thu, Mar 20 2014, 11:15-11:30)

2013

Poster presentation of our collaborators: B. Lücke, J. Peise, W. Ertmer, C. Klempt, J. Artlt, L. Pezze, A. Smerzi, F. Deuretzbacher, L. Santos, G. Vitagliano, G. Toth, Entanglement in a Bose-Eisnetein condensate [pdf], Bose-Einstein Condensation 2013, Frontiers in Quantum Gases, Sant Feliu (Spain), September 7-13, 2013; Fundamentals and Applications of Ultra-cold Matter, Visselhövede (Germany), 16th - 19th September 2013.

[invited] Spin-squeezing inequalities for entanglement detection in cold gases [pdf], Institute of Theoretical Physics, University of Ulm, Germany, 13 November, 2013.

Visiting M. Cramer and M. Plenio at the University of Ulm, Germany, 11-14 November, 2013.

Quantum Fisher information as the convex roof of the variance and its relation to multipartite entanglement [pdf1, pdf2], 4th International Workshop on Quantum Entanglement and its Detection (QED4), Siegen, Germany, 23-27 September, 2013.

Spin-squeezing inequalities for entanglement detection in cold gases [pdf], Wigner Research Centre for Physics, Budapest, Hungary, 29 July, 2013. 

Efficient algorithm for multi-qudit twirling for ensemble quantum computation [pdf], Wigner Research Centre for Physics, Budapest, Hungary, 25 July, 2013. 

Spin-squeezing inequalities for entanglement detection in cold gases [pdf], Quantum Information Processing and Communication International Conference (QIPC2013), Florence, Italy, June 30-July 5, 2013.

Spin-squeezing inequalities for entanglement detection in cold gases [pdf], 13th International Conference on Squeezing and Uncertainty Relations (ICSSUR 2013), Nürnberg, Germany, 24-28 June, 2013.

[invited] Visiting the group of H. Weinfurter at the Max Planck Institute for Quantum Optics, München, June 17-19, 2013.


Visiting L.L. Sanchez Soto in the Complutense University, Madrid, 13 June, 2013

European Research Council (ERC) Meeting, Madrid, 12 June, 2013.

[invited] Spin-squeezing inequalities for entanglement detection in cold gases [pdf, pdf2], Group of Theoretical Physics: Quantum Information and Quantum Phenomena of the Universitat Autònoma de Barcelona (J. Calsamiglia) [link], Barcelona, 11 June, 2013.

[invited] Spin-squeezing inequalities for entanglement detection in cold gases [pdf], Graduate College of the the Research Training Group 1729, Theoretical Quantum Optics Group (L. Santos) at the University of Hannover, Germany, May 21, 2013; visit between 20-23 May, 2013.

Permutationally Invariant Quantum Tomography and State Reconstruction
[pdf], Workshop Cartagena: New Trends in Complex Quantum System Dynamics, Cartagena, Spain, 8-12 April 2013.

Multipartite entanglement and high precision metrology [pdf], Conference of the German Physical Society, Hannover, Germany, 18-22 March 2013. (Thursday 11:30, 21 March 2013).

Extremal properties of the variance and the quantum Fisher information [pdf], Conference of the German Physical Society, Hannover, Germany, 18-22 March 2013. (Monday 14:45, 18 March 2013).

Permutationally Invariant Quantum Tomography and State Reconstruction” [pdf], Workshop on Mathematical Methods of Quantum Tomography, Fields Institute, Toronto, Canada, February 19-22, 2013.

2012


Quantum Chromodynamics meets Quantum Information” [pdf], QCD-N2012, Bilbao, Spain, 22-26 October, 2012.

“Permutationally invariant quantum tomography and state reconstruction” [pdf],
Workshop on Quantum Simulations, Bilbao, Spain, 22-25 October 2012.

My major research topics: Spin squeezing et al.” [pdf], Workshop Información Cuántica en España (ICE-0), Madrid, 17-19 September 2012.

[invited] COQUIT workshop, Torino, 11-14 September, 2012.

[organizer] 3rd International Worksop on Quantum Entanglement and its Detection (QED3), Bilbao, Spain, 3-7 September 2012. (Organized together with O. Gühne, Siegen.)


“Entanglement detection close to multi-qubit Dicke states in photonic experiments”
[pdf], Workshop on the dynamics and asymptotics in the Dicke model and quantum networks [conf_poster_pdf], Mátraháza, Hungary, 3–7 May, 2012. (Invited 40 minute presentation)

Optimal generalized variance and quantum Fisher information” [pdf], Conference of the German Physical Society, Stuttgart, Germany, 12-16 March, 2012.

Mapping the spatial distribution of entanglement in optical lattices” [pdf], Conference of the German Physical Society, Stuttgart, Germany, 12-16 March, 2012.

CHIST-ERA
Scalable Quantum State Analysis (QUASAR) kick-off meeting, Munich, Germany, 9 January, 2012.

2011

Generalized spin squeezing of unpolarized atomic ensembles and its modeling with Gaussian states”, 1st COQUIT Workshop, Hannover, Germany, 18-20 November, 2010. (1 hour invited talk)

Optimal spin squeezing inequalities for arbitrary spin” [pdf], Quantum Computing, Control and Communication Workshop 2011, Bernried (Munich), Germany, 8-11 October, 2011. (Invited 45 minutes presentation)

“Detecting
k-particle entanglement with spin squeezing inequalities” [pdf], 2nd International Workshop on Quantum Entanglement and its Detection (QED2), University of Siegen, Germany [conf_poster_pdf], 20 September, 2011. (Invited presentation)

Permutationally invariant quantum tomography” [pdf], Institute for Experimental Physics, University of Innsbruck, Innsbruck, Austria, 30 May 2011. (Invited 1 hour presentation.)

Permutationally invariant quantum tomography” [pdf], Conference of the German Physical Society, Dresden, Germany, 13-18 March, 2011.

“Permutationally invariant quantum tomography” [pdf],
Workshop on "New Trends in Quantum Dynamics and Entanglement", Abdus Salam ICTP (Trieste, Italy), 21 to 25 February 2011. (Invited 35 minute presentation)

Permutationally invariant quantum tomography” [pdf], International School and Conference on Quantum Information Processing and Applications (QIPA-2011) [conf_poster_pdf], Harish-Chandra Research Institute (HRI), Allahabad, India, 14-20 February 2011. (Invited 45 minute presentation)

2010

Multipartite entanglement in quantum optical systems” [pdf], Department of Theoretical Physics, Budapest University of Technology and Economics, 3 December, 2010. (Invited 1 hour presentation)

“Generalized spin squeezing of unpolarized atomic ensembles and its modeling with Gaussian states”
, 1st COQUIT Workshop [poster_pdf], Hannover, Germany, 18-20 November, 2010. (Invited 1 hour presentation)

Permutationally invariant quantum tomography” [pdf], International Conference on Quantum Information and Computation, Stockholm, Sweden, October 4-8, 2010. (30 minute presentation)

“Multipartite entanglement and its experimental detection”
[pdf], Theoretical Physics Summer School “Modern Results in Quantum Physics” , Tihany, Hungary, 30 August-3 September, 2010. (2x50 minute invited presentation)

Multipartite entanglement and high precision metrology” [pdf], Department of Mathematics (Dénes Petz), Budapest University of Technology and Economics, Budapest, Hungary, August 25, 2010.

Multipartite entanglement and its experimental detection” [pdf], Quantum Information with Atoms, Photons and Solid State Systems [poster_pdf], Grenoble, France, 17-19 June, 2010. (Invited 1 hour lecture)

“Entanglement and permutational symmetry” [pdf], Leuven Mathematical Physics Days (M. Fannes) [poster_pdf], Leuven, Belgium, 6-7 May, 2010. (Invited 30 minute presentation)

“Entanglement and permutational symmetry” [pdf], 1st International Workshop on Quantum Entanglement and its Detection (QED2010), The University of the Basque Country, Leioa/Bilbao, Spain, 27-28 April, 2010.

“Practical methods for witnessing genuine multi-qubit entanglement in the vicinity of symmetric states” [pdf], Conference of the German Physical Society, Hannover, Germany, 8-12 March, 2010.

“Generation of macroscopic singlet states in atomic ensembles” [pdf], Conference of the German Physical Society, Hannover, Germany, 8-12 March, 2010.

2009

“Quantum entanglement and its detection with few measurements” [pdf], (2 x45 minutes lecture), Grupo de Informacion y Computacin Cuanticas, Departamento de Fisica Teorica I, Facultad de Ciencias Fisicas, Universidad Complutense, Madrid, Spain, 3 December, 2009.

“Generation of macroscopic singlet states in atomic ensembles” [pdf], 11th International Conference on Squeezed States and Uncertainty Relations (ICSSUR'09), Olomouc, Czech Republic, 22-26 June, 2009.

“Generation of macroscopic singlet states in atomic ensembles” [pdf], Center for Quantum Optics, Niels Bohr Institute, Copenhagen, Denmark, 16 June, 2009.

“Entanglement and Permutational Symmetry” [pdf], Quantum Information Theory group, ICFO-The Institute of Photonic Sciences, Barcelona, Spain, 28 May, 2009.

“Entanglement and permutational symmetry” [pdf], Conference of the German Physical Society, Hamburg, Germany, 2-6 March, 2009.

2008

“Generation of macroscopic singlet states in atomic ensembles” [pdf], Theory group at the Max Planck Institute for Quantum Optics, Munich, Germany, 16 December, 2008.

“Entanglement detection using generalized spin squeezing inequalities” [pdf], Mini-Workshop on Quantum Statistics, Organizer: Denes Petz, Rényi Institute of Mathematics, Budapest, Hungary, December 12, 2008.

"Spin squeezing and entanglement" [pdf], The Jubilee 40th Symposium on Mathematical Physics, Torun, Poland, 28 June, 2008.

"Spin squeezing and entanglement" [pdf], Centre for Quantum Optics and Quantum Information, Innsbruck, Austria, 7 May, 2008.

"Optimal spin squeezing inequalities detect bound entanglement in spin models" [pdf], Autonomous University of Barcelona (Universidad Autonoma de Barcelona), Barcelona, Spain, 15 April, 2008.

"Optimal spin squeezing inequalities detect bound entanglement in spin models" [pdf], Quantum Information and Computation Group, University of Barcelona, Barcelona, Spain, 4 April, 2008.

"Optimal spin squeezing inequalities detect bound entanglement in spin models" [pdf], Laboratoire de Physique Théorique, IRSAMC, CNRS, Université Paul Sabatier, Toulouse, 5 February, 2008.

2007

"Efficient algorithm for multi-qudit twirling for ensemble quantum computation" [pdf], Department of Mathematics, Budapest University of Technology and Economics, Budapest, 18 December 2007.

"Optimal spin squeezing inequalities detect bound entanglement in spin models" [pdf], Ringberg meeting of the Max Planck Institute for Quantum Optics, Ringberg, Germany, 11 December 2007.

"Entanglement and its experimental detection" [pdf], Grupo de Información y Computación Cuánticas, Departamento de Física Teórica I, Facultad de Ciencias Físicas, Universidad Complutense, Madrid, Spain, 21 November, 2007.

"Optimal spin squeezing inequalities detect bound entanglement in spin models" [pdf], The QIPC 2007 International Conference on Quantum Information Processing and Communication, Barcelona, 15-19 October, 2007.

"Detection of quantum entanglement in many-particle systems" [pdf], Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, Budapest, Hungary, 23 August, 2007 (in Hungarian).

"Optimal spin squeezing inequalities detect bound entanglement in spin models" [pdf], Symposium on the Foundations of Modern Physics, Vienna, 7-10 June, 2007.

"Optimal spin squeezing inequalities detect bound entanglement in spin models" [pdf], Max Planck Insitute for Quantum Optics, Garching bei München, 21 May, 2007.

"Efficient algorithm for multi-qudit twirling for ensemble quantum computation" [pdf], Conference of the German Physical Society, Düsseldorf, 22 March, 2007.

2006

"Entanglement detection with witness operators" [pdf], Department of Mathematics, TU Budapest, 9 October 2006.

"Entanglement detection in the vicinity of symmetric Dicke states" [pdf], Quaintum Information Processing Workshop, 6th Joint Conference on Mathematics and Computer Science, Pécs, Hungary, 12-15 July 2006.

"Entanglement detection based on an upper bound on variances of collective observables for separable states" [pdf], Gordon Research Conference on Quantum Information, Barga, Italy, May, 2006.

"Genuine three-partite entangled states with a local hidden variable model" [pdf], Spring Meeting of the German Physical Society, Frankfurt, 13-17 March 2006.

"Two-setting Bell inequalities for graph states" [pdf], Spring Meeting of the German Physical Society, Frankfurt, 13-17 March 2006.

2005

"Entanglement detection in the stabilizer formalism" [pdf], Quantum Physics Of Nature & 6th European QIPC Workshop, Vienna, Austria, 20-26 May, 2005.

"Entanglement witnesses in spin models" [pdf],  Conference of the German Physical Society, Berlin, Germany, 4-9 March, 2005.

"Detecting Entanglement with the stabilizer formalism" [pdf], Conference of the German Physical Society, Berlin, Germany, 4-9 March, 2005.

2004

"Detecting Genuine Multipartite Entanglement with Only Two measurement Settings" [pdf], Workshop on Entanglement and Transfer of Quantum Information, Isaac Newton Institute, Cambridge, UK, 26-30 Sept. 2004.

"Witnessing Genuine Many-Qubit Entanglement with only Two Measurement Settings" [pdf], Centre for Quantum Optics and Quantum Information, Innsbruck, Austria, 23 Juny, 2004.

"Witnessing Genuine Multi-Party Entanglement with Very Few Local Measurements" [pdf], Institute for Experimental Physics, University of Vienna, Austria, 29 March, 2004.

"Multi-party Entanglement Witnesses with Simple Local Decomposition" [pdf], Gordon Research Conference on Quantum Information, Ventura, California, 22-27 Februray, 2004.

2003

"Entanglement detection with simple measurements" [pdf], Department of Theoretical Physics, University of Szeged, 18 December, 2003 (in Hungarian).

"Multy-party entanglement detection in spin chains and optical lattices of two-state atoms with collective measurement" [pdf],Theoretical Quantum Optics Group, University of Hannover, 10 December, 2003.

"Entanglement detection in continuous variable systems" [pdf], Euro Summer School on Quantum Gases in Low Dimensions, Les Houches, France, 15-25 April, 2003.

2002-

"Hydrodynamics of topological defects in liquid crystals " [pdf], 19th International Liquid Crystal Conference, Edinburgh, Scotland, 2002.

"The Role of Correlation in the Operation of Quantum-dot Cellular Automata" [pdf], Seminar and Workshop on Coherent evolution in noisy environments, Max Planck Institute at Dresden, 2001.