Polshyn, HryhoriyISTA ; Naibert, Tyler; Budakian, Raffi
We demonstrate a method for manipulating small ensembles of vortices in multiply connected superconducting structures. A micron-size magnetic particle attached to the tip of a silicon cantilever is used to locally apply magnetic flux through the superconducting structure. By scanning the tip over the surface of the device and by utilizing the dynamical coupling between the vortices and the cantilever, a high-resolution spatial map of the different vortex configurations is obtained. Moving the tip to a particular location in the map stabilizes a distinct multivortex configuration. Thus, the scanning of the tip over a particular trajectory in space permits nontrivial operations to be performed, such as braiding of individual vortices within a larger vortex ensemble—a key capability required by many proposals for topological quantum computing.
We are grateful to Nadya Mason, Taylor Hughes, and Alexey Bezryadin for useful discussions. This work was supported by the DOE Basic Energy Sciences under DE-SC0012649 and the Department of Physics and the Frederick Seitz Materials Research Laboratory Central Facilities at the University of Illinois.
Polshyn H, Naibert T, Budakian R. Manipulating multivortex states in superconducting structures. Nano Letters. 2019;19(8):5476-5482. doi:10.1021/acs.nanolett.9b01983
Polshyn, H., Naibert, T., & Budakian, R. (2019). Manipulating multivortex states in superconducting structures. Nano Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.9b01983
Polshyn, Hryhoriy, Tyler Naibert, and Raffi Budakian. “Manipulating Multivortex States in Superconducting Structures.” Nano Letters. American Chemical Society, 2019. https://doi.org/10.1021/acs.nanolett.9b01983.
H. Polshyn, T. Naibert, and R. Budakian, “Manipulating multivortex states in superconducting structures,” Nano Letters, vol. 19, no. 8. American Chemical Society, pp. 5476–5482, 2019.
Polshyn H, Naibert T, Budakian R. 2019. Manipulating multivortex states in superconducting structures. Nano Letters. 19(8), 5476–5482.
Polshyn, Hryhoriy, et al. “Manipulating Multivortex States in Superconducting Structures.” Nano Letters, vol. 19, no. 8, American Chemical Society, 2019, pp. 5476–82, doi:10.1021/acs.nanolett.9b01983.