Community Research and Development Information Service - CORDIS

Final Report Summary - QCAT (Macroscopic Quantum Superpositions of Light Generated by Quantum Cloning for Applications in Quantum Technologies)

The project “QCAT - Macroscopic Quantum Superpositions of Light Generated by Quantum Cloning for Applications in Quantum Technologies”, comprises two main sets of objectives: scientific goals and career development of the grantee, Dr. habil. Magdalena Stobinska.

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 seriously limited by inefficient photodetection. They operate with single photons which easily get lost and pass by unnoticed by the detectors. This leads to complete loss of information they carry. Single photons neither interact efficiently with each other nor with material objects. Solution to these problems is to apply macroscopically populated quantum states of light which are easily generated in laboratories. Their macroscopic nature makes them always noticed in detection however, they suffer from low distinguishability. In this project it is proposed to overcome this problem and outline macroscopic quantum states applicability for quantum technologies.

The project tasks are grouped in several Work Packages: filtering and measurement of MQS of light, sources of MQS of light, entanglement and Bell inequality tests, macroscopic entanglement as a quantum resource and quantum memory. Along with the research goals, the project aims at integration of Dr. habil. Stobinska in Polish scientific community and outlining her future career path. The skills to be mastered are: managing of projects and teams, attracting external funding and reinforcement of organizational and communication abilities. The objectives include obtaining a habilitation degree and establishing of her own scientific group. All these goals of the project were successfully obtained within the 48-month timespan.

The scientific results of the project were disseminated in a form of 15 papers published in a peer-reviewed journals and another 3 manuscripts submitted for publication. They were also presented at numerous conferences and seminars. The most interesting results comprise: development and analysis of the properties of a quantum filter, which allows for quantum engineering of MQS of light, derivation of entanglement witnesses and measures for the bright squeezed vacuum (BSV), development of Bell and steering inequalities for testing entanglement with these states. Additionally, a possibility of creation of localized waves (X-waves) in exciton-polariton Bose-Einstein condensates was shown.

Non-scientific objectives achieved by Dr. Stobinska are the creation of her own scientific Group, award of a Scholarship for Outstanding Young Scientists, becoming a member of the Young Scientists Council at the Ministry of Science and Higher Education. Dr. habil. Stobinska was also a co-chair of the International Conference on Squeezed States and Uncertainty Relations (ICSSUR) in 2015.

The website of Dr. habil. Stobinska's Group is

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