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International grants on the faculty

Last modified: 
2015, December 2 - 1:19pm
Randomness and Quantum EntangLement (RAQUEL)

7th Framework Programme

Randomness has established itself as a vital building block of information processing and represents an integral ingredient for practically any aspect in the field of information processing and technology. The principal objective of this project is to establish and evaluate the role played by randomness in quantum information processing.
The consortium (composed of 8 research teams) aims to unite the forces of EU expertise in computer science, physics and mathematics to undertake a comprehensive study of randomness and quantum information within their research portfolio.
Faculty of Mathematics, Physics and Informatics

prof. UG, dr hab. Michał Horodecki

RAQUEL project webpage

Bright Squeezed Vacuum and its Applications (BRISQ 2)

7th Framework Programme

Quantum states of light and matter are viewed as one of the basic components for quantum information technologies. Their application to the information transfer and processing already brings certain benefits (rate and security) and promises new ones. Nonclassical (quantum) states of light actually involved into information and communication technologies (ICT) are faint states: single photons and photon pairs. However, they have a disadvantage, namely, they cannot interact efficiently with each other and material systems, and this limits their applications for ICT. Macroscopic (bright) states of light do not have this disadvantage because brightness, i.e., the number of photons per radiation mode, determines the efficiency of light-light and light-matter interactions. However, certain types of them are proved to be inapplicable. In this project we investigate another class of bright nonclassical state, namely the bright squeezed vacuum (BSV). In addition, we want to demonstrate its application for quantum information technologies. BRISQ2 aims at investigating the properties of bright squeezed vacuum. In particular, under study is the amount of quantum features (nonclassicality, entanglement) contained in it, its mode structure and the perspectives of engineering this structure or filtering it. Moreover, the project implies application of bright squeezed vacuum to quantum information technologies such as quantum imaging, quantum metrology, and quantum key distribution.
Faculty of Mathematics, Physics and Informatics

prof. dr hab. Marek Żukowski

BRISQ2 webpage

Macroscopic Quantum Superpositions of Light Generated by Quantum Cloning for Applications in Quantum Technologies (QCAT)

7th Framework Programme

Quantum technologies offer new quality with respect to classical ones by enhancing sensitivity of measurements and offering unconditional security of information transfer. Their optical implementation within the current technology is limited by inefficient detection and use of single photons. The solution is to apply macroscopically populated quantum states of light (MQSL) created by quantum cloning. However, they suffer from low distinguishability. The aim of this project is to merge unique properties of these hybrid states with innovative filtering and detection methods for applications in quantum technologies. The new concept is to use a filter relying on a conditional weak measurement described by a positive operator valued measure. It preserves quantum coherences and entanglement. Also new detection techniques genuine to continuous variables will be tested. Existing sources of MQSL will be improved by quantum state engineering, broadening palette of the experimentally accessible non-Gaussian states. Genuine macroscopic entanglement and multi-mode Bell tests, possibly with pre-selection technique, will be demonstrated. Feasible entanglement witnesses and measures will be proposed. They will help testing MQSL for quantum information, cryptography, metrology, teleportation and entanglement distillation protocols. Coupling between MQSL and polaritonic Bose-Einstein condensate, also a macroscopic superposition of light, and biomolecules will be examined towards quantum memories. Decoherence effects will be included in all steps of the analysis. Additionally, conclusions about the fundamental aspects of quantum mechanics are expected: testing it against local hidden variable models and the quantum-to-classical transition. Methodology includes analytical and numerical computations within the framework of quantum optical methods and tools. This project supports the applicant in building her own group, completing habilitaion degree and home country career integration.
Faculty of Mathematics, Physics and Informatics

prof. dr hab. Marek Żukowski 

dr Magdalena Stobińska

Info on CORDIS webpage

Quantum Resources: Conceptuals and Applications  (QOLAPS)

7th Framework Programme

The studies of quantum resources - entanglement (E) and non-locality (NL) carried out over the last decade have broadened horizons of our conceptual understanding of Nature and at the same time opened unprecedented possibilities for practical applications.
The project aims at taking advantage of the most recent discoveries to understand the ultimate power and find novel applications of these resources. The main objectives are: E) to study novel entanglement-induced non-additivity effects in quantum communication and application of mixed state entanglement to quantum metrology NL) to recognize the influence of information causality on the power of quantum non-locality and verify the power of non-locality, and more generally contextuality for quantum computational speed-up. In particular, it is planned: E) to find new non-additivities by providing explicit constructions of bipartite channels, broadcast channels and quantum networks; to demonstrate experimentally non-additivity effects; to provide experimentally friendly entanglement measures in quantum networks; to analyse entanglement-enhanced metrology in presence of decoherence NL) to determine to what extent information-causality reproduces quantum mechanics; to generalize information causality to multipartite systems; to provide new fundamental information-theoretical principles behind quantum mechanics; to quantify and classify contextuality; to design and analyse multiparty non-local systems independently of quantum mechanics; to verify their usefulness for communication and computational tasks.
We shall extensively exploit multiple interrelations between these two aspects of quantum physics. The results of theoretical investigations will be implemented in labs by experimental partners. In particular, we plan pioneering implementations of quantum channel non-additivity effects. The proposed research lines will bring ground-breaking results for quantum information processing.
Faculty of Mathematics, Physics and Informatics

prof. dr hab. Ryszard Horodecki                                           

QOLAPS webpage

Quantum Interfaces, Sensors, and Communication based on Entanglement

7th Framework Programme

Quantum entanglement has the capacity to enable disruptive technologies that solve outstanding issues in: - Trust, privacy protection, and security in two- and multi-party transactions; - Novel or enhanced modes of operation of ICT devices; - Reference standards, sensing, and metrology. The development of entanglement-based strategies addresses these challenges and provides the foundations for quantum technologies of the 21st century. The practical exploitation of entanglement requires groundbreaking levels of robustness and flexibility for deployment in real-world environments. This ambitious goal can be reached only through radically new designs of protocols, architectures, interfaces, and components. Q-ESSENCE will achieve this by a concerted application-driven effort covering relevant experimental, phenomenological, and fundamental aspects. Our consortium will target three main outcomes: 1) Development of entanglement-enabled and entanglement-enhanced ICT devices: atomic clocks, quantum sensors, and quantum random-number generators; 2) Novel physical-layer architectures for long-distance quantum communication that surpass current distance limitations through the deployment of next-generation components; 3) Distributed quantum information protocols that provide disruptive solutions to multiuser trust, privacy-protection, and security scenarios based on multipartite entanglement. These outcomes will be reached through the underpinning science and enabling technologies of: light-matter interfaces providing faithful interconversion between different physical realizations of qubits; entanglement engineering at new scales and distances; robust architectures protecting quantum information from decoherence; quantum information concepts that solve problems of limited trust and privacy intrusion. The project builds on the outstanding expertise of the consortium demonstrated by pioneering works over the past decades, enhanced by a strong industrial perspective.
Faculty of Mathematics, Physics and Informatics

prof. dr hab. Marek Żukowski

Q-ESSENCE webpage