[COST] 16.4.2018 [ 𝕢 ] QUAPITAL Seminar
A network for quantum communication in milde-eastern European countries
In my presentation I will present our work we achieved so far with regards to quantum sources and new detection schemes. Then some of our free-space and fiber based communication experiments will be presented. Lastly I will sketch a new effort for bridging the borders to expand this networks across Europe and the first steps we will do between Vienna, Bratislava and Budapest on one side and Munich on the other.

Speaker: Prof. Rupert Ursin is a group leader and senior scientist at the IQOQI (Vienna). His main field of research is to develop quantum communication and quantum information processing technologies, mainly for free-space, but also for fibre-based systems. The scope of his work ranges from near term engineering solutions for secure key sharing (quantum cryptography) to more speculative research (de-coherence of entangled states in gravitational fields). Experiments on quantum communication and teleportation using entangled photon pairs is also among his interests, with the long- term goal of a future global quantum network based on quantum repeaters. He has been experimentally active in numerous international collaborations in Germany, Italy, Spain, USA as well as in China and Japan. Lead several ESA funded projects as well as on the national and EU level. These allowed him to perform highly recognized experimental studies e.g. on a 144 km free-space link between La Palma and Tenerife. His group is performing time-energy entanglement distribution over a turbulent atmosphere just recently. To date he and his publication recived several international awards and prizes. He was invited to several prestigious conferences to deliver talks (e.g. IEEE, SPIE, QCMC and others) and serves to important conferences as a program committee member e.g. ICSOS, SPIE, QCrypt and others. He currently holds a guest professorship at the University of Science and Technology (USTC) in Shanghai, China.

Time: 27/04/2018, 11:15 (Friday)
Place: QUTE building, Dúbravská cesta 9, Bratislava - Patrónka [map]

This informal research seminar is open for everyone - non-specialists, science fans and students are kindly welcome.
[COST] 15.4.2018 [ 𝕚 ] Inmedia
Otokar Horák (Dennik N)
Slovenskí vedci sa budú v projekte NATO zaoberať šifrovaním v ére kvantových počítačov
Hoci kvantové počítače zatiaľ neexistujú, vedci dokážu odhadnúť ich parametre a silu. Preto navrhnú bezpečnostné šifry tak, aby odolali ich predpokladanej výpočtovej sile.
.... continue in Dennik N ....
[CEQIP] 15.3.2018 [ 𝕚 ] Workshop
CEQIP 2018
15th edition of the traditional workshop focused on current trends in theoretical quantum information sciences. Deadline for paper submission is April 3rd. The meeting will take place in the charming Smolenice castle. More information is available at CEQIP website.
[COST] 15.4.2018 [ 𝕚 ] Project
NATO Science for Peace and Security Programme
Secure Communication in the Quantum Era

Acronym: SPS Project Number: G5448
Duration: 2018-2021
This proposal will design, analyze, and implement solutions to securely establish cryptographic keys among a group of participants. We use cryptographic theory to establish structural guarantees at the protocol level and explore performance through implementation on different platforms. Hardness assumptions are chosen to be quantum-safe (based on coding theory or/and lattices). To protect the implementation against manipulation at runtime (e.g., through fault induction), we apply runtime verification. To ensure the necessary capabilities are available, ranging from cryptographic theory to advanced software engineering and signal-level analysis (for hardware implementations), a team of four universities has been formed.
Project coordinator: Prof. Otokar Grošek (FEI STU, Bratislava)
[pub] 6.4.2018 [ 𝕚 ] Publication
Pressure effect on the superconducting and the normal state of β-Bi 2 Pd
The pressure effect up to 24.0 kbar on superconducting and normal-state properties of β-Bi 2 Pd single crystal (Tc ≈ 4.98 K at ambient pressure) has been investigated by measurements of the electrical resistivity. In addition, we have performed the heat capacity measurements in the temperature range 0.7–300 K at ambient pressure. The recent calculations of electronic density of states, electron-phonon interaction spectral function, and phonon density of states of β-Bi 2 Pd [Zheng and Margine, Phys. Rev. B 95, 014512 (2017)], are used to fit the resistivity and the heat capacity data. In the superconducting state we have focused on the influence of pressure on the superconducting transition temperature T c and upper critical field H c2 and a negative effect with dTc /dp = –0.025 K/kbar and dH c2 /dp = –8 mT/kbar is found. A simplified Bloch-Grüneisen model was used to analyze the pressure effect on the temperature dependence of the normal-state resistivity. The obtained results point to a decrease of the electron-phonon coupling parameter λ and to a shift of phonon frequencies to higher values with pressure. Moreover, the temperature dependence of the normal-state resistivity follows a T2 dependence above Tc up to about 25 K. Together with the enhanced value of Sommerfeld coefficient γ = 13.23 mJ mol −1 K −2 these results point to a certain role of the electron-electron interaction in the superconducting pairing mechanism in β-Bi 2 Pd. by G. Pristáš, Mat. Orendáč, S. Gabáni, J. Kačmarčík, E. Gažo, Z. Pribulová, A. Correa-Orellana, E. Herrera, H. Suderow, and P. Samuely
Phys. Rev. B 97, 134505 (2018) | +++ |
VEGA 2/0032/16, VEGA 2/0149/16, APVV-16-0372, EU ERDF Grant No. ITMS26220120047, European Microkelvin Platform, Liquid nitrogen for experiments was sponsored by US Steel, Košice
[COST] 5.4.2018 [ 𝕚 ] Project
COST Action CA16218
Nanoscale coherent hybrid devices for superconductng quantum technologies

Duration: 01/11/2017-31/10/2021
Superconducting technologies are prime candidates to ripen quantum effects into devices and applications. The accumulated knowledge in decades of work in understanding superconductivity allows scientists now to make experiments by design, controlling relevant parameters in devices. A new field is emerging whose final objective is to improve appliances taking advantage of quantum effects, be it for dissipationless transport of current, generation of high magnetic fields, sensors or quantum information. The field will impact crucial areas for societal development, including energy, transport, medicine or computation. Quantum behavior is controlled by using hybrids of superconductors with magnets, insulators, semiconductors or normal metals. Traditionally, the scientific and technical communities working in superconductivity are spread across projects from different calls, whose activities put Europe at the frontier of research. The present Action aims to address the pressing need for a common place to share knowledge and infrastructure and develop new cooperative projects.
Slovakia MC member: Prof. Peter Samuely (Košice)
[5in5] 2.4.2018 [ 𝕚 ] News
Quantum computing being one of 5-in-5 predictions of IBM
At IBM Think conferece has presented the selection of five technologies that will help change our lives within 5 years. "Today, quantum computing is a researcher’s playground. In five years, it will be mainstream. It will be used extensively by new categories of professionals and developers looking to this emerging method of computing to solve problems once considered unsolvable." :: http://research.ibm.com/5-in-5/quantum-computing/ ::
[QUTE] 15.3.2018 [ 𝕚 ] News
Kvantové technológie na Slovensku
Kvantový flagship je dnes jednou z hlavných výskumných priorít Európskej komisie, ktorého cieľom je podpora európskeho výskumu v oblasti tzv. kvantových technológií. Vedná oblasť kvantovej teórie informácie, z ktorej výsledkov vznikajúce kvantové technológie čerpajú, vznikla ešte v devädesiatych rokoch minulého storočia. V roku 2000 prof. Vladimír Bužek založil na Fyzikálnom ústave SAV oddelenie Centrum pre výskum kvantovej informácie, ktoré sa venuje teoretickému vývoju kvantových technológií. Medzi desať najcitovanejších vedeckých prác z fyziky (vrátane publikácií z CERNu) na Slovensku patria práce prof. Bužeka o kvantovom klonovaní a kvantovom komunikačnom protokole "quantum secret sharing". Dnes sa výskumníci centra sústreďujú na oblasť kvantových sietí, kvantovej výpočtovej zložitosti, kvantovej metrológie a vývoju efektívnych výpočtových nástrojov na simulovanie kvantových systémov. Matematický výskum v oblasti kvantových štruktúr a logík na Matematickom ústave SAV rozvíjal prof. Anatolij Dvurečenskij a jeho kolegovia ešte pred objavom ich potenciálu v informačných technológiách. Ich práce patria na Slovensku medzi tie najcitovanejšie v matematike. Experimentom v oblasti kvantového počítania sa venuje výskumný tím pod vedením prof. Miroslava Grajcara, ktorý, v spoločnom laboratóriu Fakulty Matematiky, Fyziky a Informatiky UK a Fyzikálneho ústavu SAV, pracuje na supravodivej implementácii kvantových bitov, s aplikáciami najmä v oblasti kvantových meraní a kvantovej optiky v mikrovlnom režime. Vývoj kvantových technológií priamo súvisí aj s materiálovým výskumom (realizáciou exotických systémov ako napr. Majoranovské fermióny), ktorý zastrešujú (celosvetovo) unikátne nízkoteplotné laboratóriá Ústavu experimentálnej fyziky SAV (prof. Peter Samuely) a Prírodovedeckej fakulty UPJŠ (prof. Alexander Feher) v Košiciach.
[COST] 13.3.2018 [ 𝕚 ] Project
COST Action CA15220
Quantum Technologies in Space

Acronym: QTSPACE
Duration: 20/10/2016-19/10/2020
Quantum theory and space science form building blocks of a powerful research framework for exploring the boundaries of modern physics through the unique working conditions offered by experimental tests performed in space. Space-based sources of entangled photons promise the formation of global quantum communicationetworks, long-distance tests of quantum theory and the interplay between relativity and quantum entanglement. Long free-fall times enable high- precision tests of general relativity and tests of the equivalence principle for quantum systems. Harnessing microgravity, high vacuum and low temperature of deep space promises allowing the study of deviations from standard quantum theory for high-mass test particles. Space-based experiments of metrology and sensing will push the precision of clocks, mass detectors and transducers towards the engineering of novel quantum technologies. Our particular contribution is theoretical and covers the following research goals: (1) Development of communication protocols over quantum networks, (2) Optimization of quantum networks, (3) Development of verification and testing algorithms
Slovakia MC member: Mario Ziman (Bratislava)
[MACROQUAS] 25.2.2018 [ 𝕚 ] Workshop
MACROQUAS 2018 - Optomechanical route to macroscopic superpositions
The aim of this workshop is to pin-­point the suitability of levitated optomechanics as a test-­bed for the investigation of the validity of quantum theory at the mesoscopic and macroscopic scale;; identify the fundamental challenges of such tests and the it will address opportunities offered by a space-­based configuration;; compare the capabilities of levitated optomechanics to those of other platforms such as magneto-­levitated one for the identification of the best-­suited experimental platform. Continue on MACROQUAS 2018 webpage.

When: 22-23/03/2018
Place: Pavilón kvantových technológií, Dúbravská cesta 9, Bratislava - Patrónka [map]
[⌣] 24.2.2018 [ 𝕚 ] Seminar
Optimal Port-based Teleportation in Arbitrary Dimension
Quantum teleportation is one of the earliest and most widely used primitives in Quantum Information Science which performs an arbitrary quantum state transfer between two spatially separated systems. It involves pre-sharing an entangled resource state and consists of three simple stages. The first stage involves a joint measurement of the teleported subsystem together with the share of the resource state on the sender’s side. In the second step, a classical measurement outcome is communicated to the receiver. The last step consists of applying a requisite correction operation which recovers the transmitted quantum state. Port-based teleportation (PBT) is a unique set of teleportation protocols in that they do not require unitary correction. We study PBT protocols and fully characterize their performance for arbitrary dimensions and number of ports. We find the optimal probability of success and the fidelity of teleportation for all probabilistic and deterministic PBT schemes. In the latter case, surprisingly, the answer depends only on the largest eigenvalue of a certain easy to construct a matrix which encodes the relationship between a set of Young diagrams and emerges as the optimal solution to the relevant semidefinite program. To derive our results, we develop new mathematical tools to study the symmetries of the operators that arise in PBT protocols and belong to the algebra of partially transposed permutation operators. These tools can be used to characterize quantum systems with partial symmetries. Quantum states occurring in the PBT protocol are one such example. Systems with partial symmetries are widespread but in contrast to their permutational-invariant counterparts very little is known about how to efficiently estimate their properties.
Speaker: Sergii Strelchuk (Cambridge)
Time: 27/01/2018, 11:00
Place: QUTE building, Dúbravská cesta 9, Bratislava - Patrónka [map]
[PUB] 21.2.2018 [ 𝕚 ] Publication
Incompatibility of unbiased qubit observables and Pauli channels
A quantum observable and a channel are considered compatible if they form parts of the same measurement device, otherwise they are incompatible. Constrains on compatibility between observables and channels can be quantified via relations highlighting the necessary tradeoffs between noise and disturbance within quantum measurements. In this paper we shall discuss the general properties of these compatibility relations and then fully characterize the compatibility conditions for an unbiased qubit observable and a Pauli channel. The implications of the characterization are demonstrated on some concrete examples. by Teiko Heinosaari, Daniel Reitzner, Tomáš Rybár, and Mário Ziman
Phys. Rev. A 97, 022112 (2018) | +++ |
APVV-14-0878 (QETWORK), VEGA 2/0130/15 (OAQS), SASPRO (0055/01/01)
[CALQUTE] 20.2.2018 [ 𝕚 ] Project
Causal Quantum Technologies (CALQUTE)
Europan project proposal CALQUTE submitted within the Quantum Flagship Call FETLAG-03-2018. A total of 141 proposals have been submitted in response to this call (1 CSA & 140 RIAs) distributed as follows: a.Quantum Communication (12), b.Quantum Computing System (10), c.Quantum Simulation (7), d.Quantum Metrology and Sensing (24), e. Fundamental Science (87). The CALQUTE consortium is composed of research groups from Austria (Austrian Academy of Sciences, University of Vienna), Italy (University of Pavia, Sapienza Università di Roma), United Kingdom (Oxford University), France (​Aix-Marseille Université), Belgium (Universite Libre de Bruxelles), Australia (University of Queensland) and Brazil (​ Federal University of Rio Grande do Norte) and Institute of Physics (group of RCQI) takes the role of project coordinator (Mario Ziman). ​This project aims to bring the paradigm of quantum technologies one step further by developing an information-processing framework for higher-order quantum structures and demonstrate its experimental accessibility in enhanced quantum photonics experiments.
[HIPHOP] 19.2.2018 [ 𝕚 ] Project
High dimensional quantum Photonic Platform
The only successful QuantERA project with Slovak partner HiPhoP has been aproved for financing by the Slovak Academy of Sciences. QuantERA call is understood as the pre-phase of European Quantum Technology Flagship. The project will start on April 1st.
[QUTE] 25.1.2018 [ 𝕖 ] School
1st eduQUTE school on quantum technologies
This pilot school is organized as part of the preparation of a Slovak research initiative in quantum technologies. Its main goal is to introduce the elementary physical principles of quantum technologies developing by researchers in Slovakia. It is open for any student or researcher. The subjects will be presented at master level.
[ download leaflet ]

When: 19-22/02/2018
Place: Pavilón kvantových technológií, Dúbravská cesta 9, Bratislava - Patrónka [map]

Monday 19/02/2018
14:00-14:15 Vladimír Bužek: Welcome to quantum technologies
14:15-15:45 Daniel Reitzner: Invitation to quantum information processing :: download ::
16:00-17:30 Richard Hlubina: Introduction to topological concepts in condensed matter physics
Tuesday 20/02/2018
09:00-10:30 Daniel Reitzner: Invitation to quantum information processing :: download ::
11:00-12:30 Jozef Strečka: Quantum entanglement in magnetic systems - theoretical perspectives :: download ::
14:00-15:30 Miroslav Grajcar: Introduction to superconducting qubits
16:00-17:30 Miroslav Grajcar: Lab tour superconducting qubits
18:30-xx:xx Informal common evening in Patronsky pivovar (15 minutes walk from QUTE building, what you drink/eat is what you pay)
Wednesday 21/02/2018
09:00-10:30 Gabriel Semanišin: Introduction to quantum algorithms :: download ::
11:00-12:30 Martin Gmitra: Physics of heterostructure interfaces as a source for quantum information processing :: download ::
14:00-15:30 Daniel Reitzner: Invitation to quantum information processing :: download ::
16:00-17:30 Erik Čižmár: Molecular magnets for quantum computing - experimental perspectives :: download ::
Thursday 22/02/2018
09:00-1O:30 Andrej Gendiar: Tensor networks and entanglement :: download ::
11:00-12:30 Tomáš Samuely: Topological materials :: download ::

[⌣] 14.1.2018 [ 𝕚 ] Seminar
Time deformations of quantum master equations.
We subject convolutionless and convolution master equations to time deformations and explore properties of the modied maps. Positive and completely positive divisibility of the original dynamical map is related with positivity and complete positivity of the deformed map. We provide examples of time-local and convolution master equations for qubits to illustrate the results.
Speaker: Sergey N. Filippov (Moscow)
Time: 18/01/2018, 11:00
Place: QUTE building, Dúbravská cesta 9, Bratislava - Patrónka [map]
[QUTE] 20.12.2017 [ 𝕚 ] Docs
Quantum Technology Innitiative in Slovakia
Experts from academia (Prof. Vladimir Buzek, Prof. Peter Samuely, Prof. Alexander Feher, Vladimír Cambel, DrSc, Prof. Miroslav Grajcar, doc. Karol Nemoga, doc. Mário Ziman) have met with the representatives of Slovak Ministry of Education to discuss possibilities of the support for the development of quantum technology oriented research in Slovakia. This is the starting point of the National Quantum Technology Slovak National Initiative. Although no formal proposals have been made, the process of the formulation of the national platform has started. Let us stress that the existence of such national platform is necessary requirement for Slovak researchers to have access to European Quantum Flagship. Specialized research programs and invesments are already running in many European countries: United Kingdom (350 M£), Denmark (300 M€), Germany (300 M€), Netherlands (300 M€), Hungary (10 M€), etc. Even stronger quantum technology programs are in China, Japan, USA, Canada, Australia. Huge recent investments of Google and Microsoft in quantum technologies demonstrates that the field has really strong potential.
[qMANIFESTO] 20.12.2017 [ 𝕚 ] Docs
Quantum Technologies Flagship Final Report || download ||
To prepare the QT Flagship, the European Commission appointed an independent High-Level Steering Committee (HLSC) consisting of 12 distinguished Academic Members and 12 high-ranking Industry Members (from both large multi-nationals and SMEs), as well as one observer. One of the members of HLSC was Prof. Vladimír Bužek, founder of Research Center for Quantum Information at Institute of Physics of Slovak Academy of Sciences. After almost one year, on July 2017, HLSC presented their final report.

The Strategic Research Agenda (SRA) proposed in this document sets the ambitious but achievable goals for the Flagship’s ten-year lifetime, and details them for the initial threeyear ramp-up phase. To work towards these goals, the QT Flagship should be structured around four mission-driven research and innovation domains, representing the major applied areas in the field: Communication, Computation, Simulation, as well as Sensing and Metrology. These application domains should be built on a common basis of Basic Science, with top research institutions and companies spread across Europe assisting their objectives by delivering novel ideas, tools, methods and processes. The enabling aspects addressed in each domain belong to one of these three categories: Engineering and Control, Software and Theory, Education and Training.
[qMANIFESTO] 20.12.2017 [ 𝕚 ] Docs
Quantum Manifesto || download ||
Strategic document that calls upon Member States and the European Commission to launch a €1 billion Flagship-scale Initiative in Quantum Technology, preparing for a start in 2018 within the European H2020 research and innovation framework programme. It was prepared by Aymard de Touzalin (European Commission), Charles Marcus (University of Copenhagen), Freeke Heijman (NL ministry for economic affairs), Ignacio Cirac (Max-Planck Institute for Quantum Optics), Richard Murray (Innovate UK) and Tommaso Calarco (IQST Centre, Ulm) and officially released on May 2016 at the Quantum Europe Conference in Amsterdam in cooperation with the European Commission and the QuTech center in Delft. It aims to place Europe at the forefront of the second quantum revolution now unfolding worldwide, bringing transformative advances to science, industry and society. It will create new commercial opportunities addressing global challenges, provide strategic capabilities for security and seed as yet unimagined capabilities for the future. As is now happening around the world, developing Europe’s capabilities in quantum technologies will create a new knowledge-based industrial ecosystem, leading to long-term economic, scientific and societal benefits. It will result in a more sustainable, more productive, more entrepreneurial and more secure European Union. Quantum Manifesto was endorsed by more than 3500 researchers and initiated the Quantum Technology Flagship. The document was prepared under FP7 Coordination Action QUTE-EUROPE (http://qute-europe.eu/) that was coordinated by Research Center for Quantum Information of Institute of Physics of Slovak Academy of Sciences (Mario Ziman).
Quantum Technology Slovak National Initiative © 2018