YQIS Conference and CoQuS Summer School 2018 (Vienna, Sep. 17-21)

Dear colleagues,

We would like to cordially invite you to the conference for Young Quantum Information Scientists (YQIS) and the Complex Quantum Systems (CoQuS) summer school who will jointly organise their events. Vienna, with its long history in Quantum mechanical research, will be the hosting city for this event from 17th to 21st of September 2018. The goal is to bring together young and experienced quantum information researchers to increase contact and knowledge sharing in the community. We provide a platform for young researchers to learn new topics and improve presentation skills.

The YQIS conference and CoQuS summer school program will have a diverse program. We would like to encourage Phd students to present their research on topics related to quantum information in the form of a talk or a poster in one of our sessions. There will be a lecture series and presentations on cutting edge science by renowned researchers as well as talks and posters of young researchers. Speakers that are already confirmed are: Marcin Pawlowski from the University of Gdańsk, Stephanie Wehner from QuTech in Delft, Gerhard Rempe from the MPIQ in Munich, Marissa Giustina, Quantum Electronics Engineer at Google, Lidia del Rio from ETH Zürich, Elham Kashefi from the University of Edinburgh, and Ronald de Wolf from the CWI in Amsterdam. Several networking events are in the program where researchers in all stages of their careers can meet and exchange their ideas.

More speakers and detailed information can be found on our website:


Please register at your earliest convenience as places are limited. Deadline is June 30th 2018.

We hope to see you in Vienna!


The local organizing committee


Modern topics in quantum information @ IIP, Natal

The registration for the event “Modern topics in quantum information” is now open. It will take place at the International Institute of Physics in Natal (Brazil) between 30.07.2018 and 17.08.2018. For more details please visit the website


In short, the first and third weeks will consist of 2 more specialized workshops with a broad conference in between covering a wide range of topics: Quantum foundations, Quantum cryptography, Quantum thermodynamics, Quantum computation, Quantum causality, Quantum machine learning, Quantum many-body systems, Quantum information-inspired experiments, Quantum information and high-energy physics, etc.

The preliminary list speakers include:

Antonio Acin, ICFO Barcelona, Spain
Alexander Altland, University of Cologne, Germany
Aram Harrow, MIT, USA
Boaz Barak, Computer Science, Harvard University, USA
Caslav Brukner, IQOQI Vienna, Austria
Cecilia Lancien, Universidad Complutense de Madrid, Spain
Fabio Sciarrino, Sapienza University, Italy
Fernando Brandão, Caltech, USA
Francesco Buscemi, Nagoya University, Japan
Jean B. Lasserre,LAAS-CNRS, Toulouse France, TMBI (Univ. Toulouse)
Jens Eisert, Free University of Berlin, Germany
Laura Mancinska, Copenhagen, Denmark
Luiz Davidovich, UFRJ, Brazil.
Omar Fawzi, Computer Science, École Normale Supérieure de Lyon, France
Marcelo França, UFRJ, Brazil
Miguel Navascues, Physics, IQOQI Vienna, Austria
Marcos Huber, IQOQI Vienna, Austria
Philip Walther, University of Vienna, Austria
Roberto Serra, UFABC, Brazil
Stephen Walborn, UFRJ, Brazil

We look forward to see you in Natal!

Journal Club QuantPh+CondMat: Allan Tosta, 21.03, 16h00 @CBPF

Quantum Information Group @ CBPF

The first talk by Allan was great. He nicely introduced the Toric Code. Now we are ready to see how anyons pop up in such a model. This is the topic of his second talk. See the informations below, and be sure to not miss it.

Title: Estatística como simetria no código tórico.

Speaker: Allan David (UFF)

Coordinates: room 601C, CBPF. 21.03, 16h00

Abstract: Nesse seminário faremos um resumo comentado do modelo definido pelo famoso artigo “Fault-Tolerant Quantum Computation by Anyons” de A.Yu.Kitaev, o Código Tórico, motivando sua definição como um código de correção de erros que usa “graus de liberdade homologicos” do toro para gerar um espaço de codificação protegido de erros de “bit flip” e “phase flip”, mostraremos como a dimensão desse espaço pode ser caracterizada através da “característica de Euler” do toro e dos operadores lógicos atuando no código. Mostramos uma Hamiltoniana que implementa esse código a…

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New article: Experimental characterization of a spin quantum heat engine

Quantum Information Group @ CBPF

Title: Experimental characterization of a spin quantum heat engine

Authors: John P. S. Peterson, Tiago B. Batalhão, Marcela Herrera, Alexandre M. Souza, Roberto S. Sarthour, Ivan S. Oliveira, Roberto M. Serra

link: https://arxiv.org/abs/1803.06021

Abstract: Developments in the thermodynamics of small quantum systems envisage non-classical thermal machines. In this scenario, energy fluctuations play a relevant role in the description of irreversibility. We experimentally implement a quantum heat engine based on a spin-1/2 system and nuclear magnetic resonance techniques. Irreversibility at microscope scale is fully characterized by the assessment of energy fluctuations associated with the work and heat flows. We also investigate the efficiency lag related to the entropy production at finite time. The implemented heat engine operates in a regime where both thermal and quantum fluctuations (associated with transitions among the instantaneous energy eigenstates) are relevant to its description. Performing a quantum Otto cycle at maximum power, the proof-of-concept quantum heat…

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Journal Club QuantPh+CondMat: Allan Tosta, 15.03, 16h00 @CBPF

Quantum Information Group @ CBPF

Since the middle of 2017 we have managed to put together a journal club where condensed matter and quantum information people have to talk to each other. It is not always easy, but we are having good discussions and quite some fun. One of the topics that always pops up is topological quantum computation… As no one here @CBPF knows a lot about it, we get stuck very quickly in some (probably) basic questions. To help us get a clear view of this topic we invited Allan David to join us in our next meeting. Allan is a PhD student at UFF who, together with his advisor Ernesto Galvão, has been studying this theme in recent years. We are very happy to have Allan in our journal club, and everybody is invited. It’s gonna be relaxed; it’s gonna be informal; it’s gonna be fun!

Title: Estatística como simetria no código…

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New article: Quantum Walks via Quantum Cellular Automata

Quantum Information Group @ CBPF

Title: Quantum Walks via Quantum Cellular Automata

Authors: Pedro C.S. Costa (CBPF), Renato Portugal (LNCC), Fernando de Melo (CBPF)

Link: https://arxiv.org/abs/1803.02176

Abstract: Very much as its classical counterpart, quantum cellular automata are expected to be a great tool for simulating complex quantum systems. Here we introduce a partitioned model of quantum cellular automata and show how it can simulate, with the same amount of resources (in terms of effective Hilbert space dimension), various models of quantum walks. All the algorithms developed within quantum walk models are thus directly inherited by the quantum cellular automata. The latter, however, has its structure based on local interactions between qubits, and as such it can be more suitable for present (and future) experimental implementations.

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QM Talks@CBPF: Ivan de Oliveira, HOJE, 16h

Quantum Information Group @ CBPF

Title: ‘Q-bits supercondutores’

Speaker: Ivan de Oliveira (CBPF)

Coordinates: room 601C, CBPF. 28.02, 16h00

Abstract: O ano de 2017 pode entrar para a história da computação e da tecnologia (e também da física!) como aquele em que os computadores quânticos superaram as possibilidades computacionais das máquinas clássicas, um marco que está sendo chamado ‘supremacia quântica’.

A razão para isso foi o anúncio feito pela empresa IBM, em novembro do ano passado, da construção de um chip quântico contendo 50 q-bits (50 bits quânticos), baseado na tecnologia de supercondutores.

A despeito de um inevitável grau de sensacionalismo midiático, os esforços, agora, concentram-se, por um lado, em se demonstrar que, de fato, tal supremacia ocorreu e, por outro, tornar essa tecnologia acessível ao usuário comum.

Neste seminário, serão apresentados os três tipos de q-bits supercondutores, como eles se acoplam em um chip passível de escalonamento, bem como a plataforma da IBM.

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