Controllable quantum-information transfer in superconducting networks
Final Report Abstract
The bilateral German-Ukrainian project focused on advancing the fundamental understanding and practical capabilities of quantum information transfer in condensed-matter systems, using hybrid superconductor-based networks as a physical platform. Its main goal was to investigate the physical mechanisms of charge and vortex transport in mesoscopic superconducting structures and identify ways to implement fully controllable, coherent quantum state transfer. These objectives were pursued through a combination of theoretical modeling and experimental measurements, carried out collaboratively between Friedrich Schiller University Jena and Ukrainian research institutes. On the charge transport side, the project explored the use of spatially localized quasiparticle wave packets as quantum carriers. Ballistic transport through superconducting beam-splitters and Y-junctions was modeled, highlighting how temperature, voltage bias, and device geometry can be tuned to route quantum information with precision. The theoretical techniques included the Landauer–Büttiker formalism, Floquet theory, and non-equilibrium noise analysis. A novel fluctuation effect arising from temperature gradients, delta-T noise, was introduced and theoretically predicted in hybrid nanojunctions, providing a sensitive tool for probing temperature distributions and dynamic states in quantum circuits. On the vortex side, the project introduced and analyzed moving vortices as alternative quantum carriers. Experimental work demonstrated spin-imbalance effects in wide superconducting films and studied proximity phenomena in S/F/S multilayers, with potential applications in superconducting memory and fluxon-based logic. New fabrication and diagnostic methods were developed to control Abrikosov vortex dynamics using engineered ferromagnetic overlays. The results contribute significantly to the future of quantum information processing with superconductors, offering new methods for coherent signal routing, entanglement generation, and quantum state manipulation. The project also laid the foundation for further cooperation, including a new partnership with TU Ilmenau.
Publications
-
Ballistic quantum spin separator. Low Temperature Physics, 45(8), 923-927.
Zhitlukhina, E.; Belogolovskii, M. & Seidel, P.
-
Perfect absorbing in quantum nanoscale networks. International Conference “Nanotechnologies and Nanomaterials” (NANO-2019), August 27–30, 2019, Lviv, Ukraine
Zhitlukhina, E., Belogolovskii, M. & Seidel, P.
-
Quantum interference and entanglement effects in hybrid three-terminal splitters. 17th International Superconductive Electronics Conference (ISEC 2019), July 28 – August 1, 2019, Riverside, California, USA
Belogolovskii, M., Zhitlukhina, E. & Seidel, P.
-
Self-guided transfer of spin-polarized wave packets in a hybrid quantum setup. 14th European Conference on Applied Superconductivity, September 1–5, 2019, Glasgow, UK
Zhitlukhina, E., Belogolovskii, M. & Seidel, P.
-
Voltage- and temperature-controllable quantum-data processing across three-terminal superconducting nanodevices. Applied Nanoscience, 10(8), 2781-2789.
Belogolovskii, Mikhail; Zhitlukhina, Elena & Seidel, Paul
-
Anomalously enhanced thermal noise in quantum rings. International Conference “Nanotechnologies and Nanomaterials” (NANO-2020), August 26–29, 2020, Lviv, Ukraine
Zhitlukhina, E., Belogolovskii, M. & Seidel, P.
-
Electronic noise generated by a temperature gradient across a hybrid normal metal–superconductor nanojunction. Applied Nanoscience, 10(12), 5121-5124.
Zhitlukhina, Elena; Belogolovskii, Mikhail & Seidel, Paul
-
Submicron-sized MoRe-doped Si-MoRe Josephson junctions with a low specific capacitance. Journal of Physics: Conference Series, 1559(1), 012005.
Kalenyuk, A.; Shapovalov, A.; Shnyrkov, V.; Shaternik, V.; Belogolovskii, M.; Febvre, P.; Schmidl, F. & Seidel, P.
-
Tailoring high-harmonic generation from a phase-coherent quantum ring. QUANTUM 2020 Virtual Conference, October 19–22, 2020, UK
Zhitlukhina, E., Belogolovskii, M. & Seidel, P.
-
Microwave-driven persistent currents in a nanoscale quantum ring. Applied Nanoscience, 12(3), 377-383.
Zhitlukhina, Elena; Belogolovskii, Mikhail & Seidel, Paul
-
Quantum effects in the persistent edge state transport. 2nd European Quantum Technologies Virtual Conference (EQTC), November 29 – December 2, 2021
Belogolovskii, M., Zhitlukhina, E. & Seidel, P.
-
Scanning shot-noise spectroscopy of robust edge currents in topological materials. School-Conference of Young Scientists “Modern Material Science: Physics, Chemistry, Technology” (MMSPCT-2021), October 4–8, 2021, Uzhhorod, Ukraine
Boliasova, O., Zhitlukhina, E. & Seidel, P.
-
Self-directed quantum information transfer via wave packets. In: Proceedings of the 17th International Conference on Electronics and Applied Physics (APHYS 2021), Kyiv, Ukraine, 2021, pp. 54–55. Taras Shevchenko National University of Kyiv.
Zhitlukhina, E., Belogolovskii, M. & Seidel, P.
-
Charge transport through superconducting nanodevices. International Conference “Nanotechnologies and Nanomaterials” (NANO-2022), August 25–27, 2022, Lviv, Ukraine
Belogolovskii, M., Zhitlukhina, E. & Seidel, P.
-
Critical current enhancement in a superconducting nanolayer proximitized to a weak-ferromagnetic film. Applied Nanoscience, 13(7), 4771-4777.
Zhitlukhina, Elena; Poláčková, Magdaléna; Volkov, Serhii; Grančič, Branislav; Gregor, Maroš; Plecenik, Tomaš; Belogolovskii, Mikhail; Seidel, Paul & Plecenik, Andrej
-
Detecting Helical Andreev Edge States by Shot-Noise Measurements. METALLOFIZIKA I NOVEISHIE TEKHNOLOGII, 44(3), 289-296.
Zhitlukhina, E. S. & Seidel, Paul
-
Disorder-enhanced superconductivity. In: Novel Frontiers in Materials Science: Innovative Components for Next-Generation Superconductor Technologies. M. Belogolovskii (Ed.), Vasyl’ Stus DonNU, Vinnytsia, 2022, pp. 6–43. ISBN: 978-99-999-303-8
Belogolovskii, M., Shapovalov, A., Zhitlukhina, E. & Seidel, P.
-
Enhanced superconductivity in nanoscale amorphous films. 23rd Annual Conference on Material Science (YUCOMAT 2022), August 29 – September 2, 2022, Herceg Novi, Montenegro
Belogolovskii, M., Zhitlukhina, E., Shapovalov, A. & Seidel, P.
-
Josephson junctions with a metamaterial barrier. Deutsche Physikalische Gesellschaft (DPG) Condensed Matter Section Meeting, September 4–9, 2022, Regensburg, Germany
Belogolovskii, M., Seidel, P., Nevirkovets, I. & Ketterson, J.
-
Magnetic-pinning enhancement of the critical current density in type-II superconductor/ferromagnet bilayers. Deutsche Physikalische Gesellschaft (DPG) Condensed Matter Section Meeting, September 4–9, 2022, Regensburg, Germany
Zhitlukhina, E., Gregor, M. & Seidel, P.
-
Probing supercurrent spatial distribution in interlayer barriers with Josephson interferometry. 12th International Conference “Solid State Surfaces and Interfaces”, November 21–23, 2022, Smolenice, Slovak Republic
Belogolovskii, M., Gregor, M. & Seidel, P.
-
Delta-T noise in AC-biased normal-metal–superconductor contacts. 16th European Conference on Applied Superconductivity (EUCAS 2023), September 3–7, 2023, Bologna, Italy
Belogolovskii, M., Zhitlukhina, E. & Seidel, P.
-
Fingerprints of Leggett-like collective excitations in two-component superconductors. III International Conference “Condensed Matter & Low Temperature Physics 2023” (CM<P 2023), June 5–11, 2023, Kharkiv, Ukraine
Shapovalov, A., Tarenkov, V., Kalenyuk, A., Krivoruchko, V., Menesenko, D., Zhitlukhina, E., Belogolovskii, M. & Seidel, P.
-
Low-Temperature Thermally Induced Noise in the Presence of an AC Voltage Bias. Journal of Low Temperature Physics, 212(1-2), 79-88.
Zhitlukhina, Elena; Belogolovskii, Mikhail & Seidel, Paul
-
Mo-Re alloy: A new benchmark two-band superconductor. Low Temperature Physics, 49(1), 103-107.
Tarenkov, V.; Shapovalov, A.; Zhitlukhina, E.; Belogolovskii, M. & Seidel, P.
-
Probing superconducting granularity using nonlocal four-probe measurements. The European Physical Journal Plus, 138(6).
Poláčková, Magdaléna; Zhitlukhina, Elena; Belogolovskii, Mikhail; Gregor, Maroš; Plecenik, Tomáš & Seidel, Paul
-
Charge transport in a normal–superconductor–normal trilayer with nanoscale scattering interfaces. International Conference “Nanotechnologies and Nanomaterials” (NANO-2024), August 21–24, 2024, Uzhhorod, Ukraine
Zhitlukhina, E. & Seidel, P.
-
Delta-T noise, a new tool for detecting temperature fields in superconducting films. European Quantum Technologies Conference (EQTC 2024), November 18–20, 2024, Lisbon, Portugal
Zhitlukhina, E. & Seidel, P.
-
Towards hybridization of photonic and superconducting quantum platforms with transparent superconductors. European Quantum Technologies Conference (EQTC 2024), November 18–20, 2024, Lisbon, Portugal
Belogolovskii, M., Aliev, A. & Seidel, P.
-
Blonder–Tinkham–Klapwijk formalism extended to an inhomogeneous superconducting state. 17th European Conference on Applied Superconductivity (EUCAS 2025), September 21–25, 2025, Porto, Portugal
Zhitlukhina, E., Belogolovskii, M. & Seidel, P.
-
Differential shot noise and Fano factor in mesoscopic junctions with inhomogeneous superconductors. V International Conference “Condensed Matter & Low-Temperature Physics” (CM<P 2025), June 2–6, 2025, Kharkiv, Ukraine
Dmytrenko, V., Zhitlukhina, E. & Seidel, P.
-
Mesoscopic S/F/S trilayers in parallel magnetic fields. 17th European Conference on Applied Superconductivity (EUCAS 2025), September 21–25, 2025, Porto, Portugal
Belogolovskii, M., Poláčková, M., Zhitlukhina, E., Grančič, B., Satrapinskyy, L., Ďurina, P., Gregor, M., Plecenik, T. & Seidel, P.
