Seminarium Fizyki Ciała Stałego

We introduce the Single Vortex Box (SVB) – a nanodevice that allows to treat a single superconducting vortex as a macroscopic, albeit quantized "particle", which can be created and annihilated with pulses of electrical current. Our pioneering demonstration is a pivotal step towards the development of the vortex electronics i.e. memory cells, superconducting diodes, and logical elements. Using the method of fast time-resolving switching thermometry [1], we measure the temperature rise and the subsequent thermal relaxation of the SVB resulting from the expulsion of just a single magnetic field vortex. Our experiment thus provides a calorimetric estimation of the dissipation in a superconductor due to a single moving vortex. This is a feat of the fundamental importance that has never been accomplished before, which belongs to the emerging field of the experimental quantum thermodynamics.1. M. Zgirski, M. Foltyn, A. Savin, A. Naumov, K. Norowski, Heat Hunting in a Freezer: DirectMeasurement of Quasiparticle Diffusion in Superconducting Nanowire, Phys. Rev. Applied14, 044024 (2020)UwagaSeminarium w trybie HybrydowymFaculty of Physics room 0.06link to remote mode:https://zoom.us/j/7218838148szczegóły patrz instrukcja :instrukcja: (pdf file)AttentionThe seminar in the Hybrid modeFaculty of Physics room 0.06for details see instruction :instruction: (pdf file)