Foltyn Marek, Norowski Konrad, Savin Alexander, Zgirski Maciej
Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, Warsaw PL 02668, Poland.
QTF Centre of Excellence, Department of Applied Physics, Aalto University, Aalto FI-00076, Finland.
Sci Adv. 2024 Aug 2;10(31):eado4032. doi: 10.1126/sciadv.ado4032. Epub 2024 Jul 31.
We demonstrate complete control over dynamics of a single superconducting vortex in a nanostructure, which we coin the Single Vortex Box. Our device allows us to trap the vortex in a field-cooled aluminum nanosquare and expel it on demand with a nanosecond pulse of electrical current. Using the time-resolving nanothermometry we measure [Formula: see text] joules as the amount of the dissipated heat in the elementary process of the single-vortex expulsion. Our experiment enlightens the thermodynamics of the absorption process in the superconducting nanowire single-photon detectors, in which vortices are perceived to be essential for a formation of a detectable hotspot. The demonstrated opportunity to manipulate a single superconducting vortex reliably in a confined geometry comprises a proof of concept of a nanoscale nonvolatile memory cell with subnanosecond write and read operations, which offers compatibility with quantum processors based either on superconducting qubits or on rapid single-flux quantum circuits.
我们展示了对纳米结构中单个超导涡旋动力学的完全控制，我们将其命名为单涡旋盒。我们的装置使我们能够将涡旋捕获在场冷铝纳米正方形中，并通过纳秒级电流脉冲按需将其排出。使用时间分辨纳米测温法，我们测量出在单涡旋排出的基本过程中耗散的热量为[公式：见正文]焦耳。我们的实验揭示了超导纳米线单光子探测器中吸收过程的热力学，其中涡旋被认为是形成可检测热点的关键。在受限几何结构中可靠地操纵单个超导涡旋这一已证明的机会，构成了具有亚纳秒写入和读取操作的纳米级非易失性存储单元的概念验证，这为基于超导量子比特或快速单磁通量子电路的量子处理器提供了兼容性。
