{"id":244,"date":"2018-11-10T19:17:26","date_gmt":"2018-11-10T18:17:26","guid":{"rendered":"http:\/\/webek2.fuw.edu.pl\/photon\/?page_id=244"},"modified":"2026-05-21T13:31:41","modified_gmt":"2026-05-21T11:31:41","slug":"homing","status":"publish","type":"page","link":"https:\/\/photon.fuw.edu.pl\/index.php\/homing\/","title":{"rendered":"Homing Project"},"content":{"rendered":"

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MANIPULATING SPECTRAL ENTANGLEMENT BY COMPLEX TEMPORAL PHASE MODULATION<\/h1>\n

A research project within the HOMING Programme of the Foundation for Polish Science
\nSpectral engineering of entangled quantum light<\/h3>\n

THE PROJECT<\/h4>\n

Quantum entanglement manifests itself in the strongest possible correlations between two physical systems. Entanglement between photons forms the basis of ultimately secure cryptographic key distribution protocols – quantum key distribution (QKD). Furthermore,\u00a0the field of quantum information processing (QIP), which holds promise to revolutionize computation and metrology, relies crucially on entanglement. Out of the photon’s degrees of freedom,\u00a0the spectral-temporal is the most promising, yet the least explored in the context of QIP. Its assets are high dimensionality and compatibility with integrated optics, however manipulating spectral-temporal entanglement in a lowloss, low-noise manner is challenging. Here we will use the latest advances in fast electro-optic phase modulation techniques to perform significant modifications of the quantum state of spectrally entangled photon pairs. In particular, we will investigate their use for highly efficient spectrally encoded QKD.<\/p>\n

PROJECT GOALS<\/h6>\n

Development of tools to enable efficient utilization of photon pairs entangled in the spectral-temporal degree of freedom for quantum information processing applications, such as high-dimensional quantum key distribution.<\/p>\n

EXPECTED OUTCOMES<\/h6>\n

Construction of electro-optic devices enabling modification of spectral-temporal entanglement between pairs of individual photons. Training of young scientists towards their Master’s and PhD theses.<\/p>\n

PRACTICALITIES<\/h6>\n

The project was carried out at the Quantum Photonics Lab at the Faculty of Physics of the University of Warsaw under the lead of Dr Micha\u0142 Karpi\u0144ski, in collaboration with the Optical Quantum Technologies group at the University of Oxford. The project was financed by the HOMING programme of the Foundation for Polish Science. The total value of the project was 753 270 PLN. It was fully funded by the European Union’s European Regional Development Fund.<\/p>\n

OUR PUBLICATIONS<\/h4>\n

Measuring the single-photon temporal-spectral wave function
\n<\/strong><\/em>Alex O. C. Davis, Val\u00e9rian Thiel, Micha\u0142 Karpi\u0144ski, Brian J. Smith
\n<\/a>Phys. Rev. Lett. 121, 083602 (2018).<\/a>
\n<\/a>arXiv:1709.05248.<\/a><\/p>\n

Experimental single-photon pulse characterization by electro-optic shearing interferometry
\n<\/strong><\/em>Alex O. C. Davis, Val\u00e9rian Thiel, Micha\u0142 Karpi\u0144ski, Brian J. Smith
\n<\/a>Phys. Rev. A. 98, 023840 (2018).<\/a>
\n<\/a>arXiv:1802.07208.<\/a><\/p>\n

Large-scale spectral bandwidth compression by complex electro-optic temporal phase modulation
\n<\/em><\/strong>Filip So\u015bnicki, Micha\u0142 Karpi\u0144ski
\n Optics Express 26, 31307\u201331316 (2018).<\/a><\/p>\n

Entanglement swapping for generation of heralded time-frequency-entangled photon pairs
\n<\/strong><\/em>Dashiell L. P. Vitullo, Michael G. Raymer, Brian J. Smith, Micha\u0142 Karpi\u0144ski, Lasse Mejling, Karsten Rottwitt,
\n<\/a>Phys. Rev. A 98, 026836 (2018).<\/a>
\n<\/a>arXiv:1802.00110.<\/a><\/p>\n

PROJECT TEAM<\/h4>\n
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Micha\u0142 Karpi\u0144ski\r\n<\/div>\r\n

Team leader<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Filip So\u015bnicki\r\n<\/div>\r\n

Got his PhD at QPL.
\nPostdoc at the Insitute for Photonic Quantum Systems at Paderborn University, Germany.<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Ali Golestani\r\n<\/div>\r\n

Got his PhD at QPL.
\nPostdoc at the University of Calgary.<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Micha\u0142 Miko\u0142ajczyk\r\n<\/div>\r\n

PhD Student<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Adam Widomski\r\n<\/div>\r\n

Got his PhD at QPL, working at HHI Fraunhofer Institute in Berlin.<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Maciek Ga\u0142ka\r\n<\/div>\r\n

MSc student at QPL,
\nobtained his PhD at University of Cambridge, UK<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Prashant Dagale\r\n<\/div>\r\n

Summer of 2018<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Martin Luttmann\r\n<\/div>\r\n

Summer of 2018<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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\u0141ukasz Zinkiewicz\r\n<\/div>\r\n
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Monika Mikulicz\r\n<\/div>\r\n

Summer of 2018<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Tomasz Kowalczyk\r\n<\/div>\r\n

Optoelectronics technician<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Dominika Bondar\r\n<\/div>\r\n

BSc student at QPL. Got a job at Fluence.technology after MSc graduation.<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Jadwiga Wilkens\r\n<\/div>\r\n

Summer of 2019, financed by DAAD<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Lyudmila Silantieva\r\n<\/div>\r\n

Autumn of 2020, financed by BARI - Baltic Science Network<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Sanjay Kapoor\r\n<\/div>\r\n

PhD Student<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Arifah Nurul Amaliah\r\n<\/div>\r\n

MSc student at QPL.
\nGot a job at Vigo Photonics after graduation.<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Cedric Hannemann\r\n<\/div>\r\n

Summer of 2021<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Jerzy Szuniewicz\r\n<\/div>\r\n

PhD Student<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Karol Piotrowski\r\n<\/div>\r\n

Summer of 2023, financed by Candela Fundation<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Do\u011fukan Ta\u015f\r\n<\/div>\r\n

Summer of 2023<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Maciej Ogrodnik\r\n<\/div>\r\n

PhD student<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Jan Krzy\u017canowski\r\n<\/div>\r\n

PhD student<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Dinara Kalkabaeva\r\n<\/div>\r\n

MSc student at QPL,
\ngot a job at OPmobility <\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Adam \u015awiniarski\r\n<\/div>\r\n

MSc 2025, working at the Institute of Physics PAS.<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Ksawery Mielczarek\r\n<\/div>\r\n

Got his MSc at QPL in 2025. Working at the Pozna\u0144 Supercomputing and Networking Center.<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n

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Natalia Bednarek\r\n<\/div>\r\n

BSc at QPL, working on her MSc @ FUW with Radek \u0141apkiewicz.<\/p>\n<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n\r\n

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