Nanoscale engineering and dynamical stabilization of mesoscopic spin textures

• URL: http://arxiv.org/abs/2310.05635v1
• Date: Mon, 9 Oct 2023 11:46:53 GMT
• Title: Nanoscale engineering and dynamical stabilization of mesoscopic spin textures
• Authors: Kieren Harkins, Christoph Fleckenstein, Noella D'Souza, Paul M. Schindler, David Marchiori, Claudia Artiaco, Quentin Reynard-Feytis, Ushoshi Basumallick, William Beatrez, Arjun Pillai, Matthias Hagn, Aniruddha Nayak, Samantha Breuer, Xudong Lv, Maxwell McAllister, Paul Reshetikhin, Emanuel Druga, Marin Bukov and Ashok Ajoy
• Abstract summary: We demonstrate the ability to harness thermalization to engineer and stabilize structured quantum states in a mesoscopically large ensemble of spins. Specifically, we showcase the capacity to generate, control, stabilize, and read out'shell-like' spin texture with interacting $ 13mathrmC$ nuclear spins in diamond.
• Score: 0.3770540828119563
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Thermalization phenomena, while ubiquitous in quantum systems, have traditionally been viewed as obstacles to be mitigated. In this study, we demonstrate the ability, instead, to harness thermalization to dynamically engineer and stabilize structured quantum states in a mesoscopically large ensemble of spins. Specifically, we showcase the capacity to generate, control, stabilize, and read out 'shell-like' spin texture with interacting $ {}^{ 13}\mathrm{C}$ nuclear spins in diamond, wherein spins are polarized oppositely on either side of a critical radius. The texture spans several nanometers and encompasses many hundred spins. We capitalize on the thermalization process to impose a quasi-equilibrium upon the generated texture; as a result, it is highly stable, immune to spin diffusion, and endures over multiple-minute long periods -- over a million times longer than the intrinsic interaction scale of the spins. Additionally, the texture is created and interrogated without locally controlling or probing the nuclear spins. These features are accomplished using an electron spin as a nanoscale injector of spin polarization, and employing it as a source of spatially varying dissipation, allowing for serial readout of the emergent spin texture. Long-time stabilization is achieved via prethermalization to a Floquet-induced Hamiltonian under the electronic gradient field. Our work presents a new approach to robust nanoscale spin state engineering and paves the way for new applications in quantum simulation, quantum information science, and nanoscale imaging.

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