Unraveling spin entanglement using quantum gates with scanning tunneling microscopy-driven electron spin resonance
Year: 2025
Type: article
Abstract: electron spin resonance combined with scanning tunneling microscopy (ESR-STM). Using two titanium atoms on a MgO/Ag(100) substrate as a model, we construct a two-qubit system whose dynamics are coherently manipulated through tailored microwave pulse sequences. We generate Bell states by implementing a Hadamard gate followed by a controlled-NOT gate, and evaluate its fidelity and concurrence using the quantum-master equation-based code TimeESR. Our results demonstrate that ESR-STM can create entangled states with significant fidelity. This study paves the way for the realization of atom-based quantum circuits and highlights ESR-STM as a powerful tool for probing and engineering entangled states on surfaces.
Source: Nanoscale Advances
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,962
Funders: Ministerio de Ciencia, Tecnología e Innovación, U.S. Department of Energy, Ministerio de Ciencia, Innovación y Universidades, European Commission, Ministerio de Ciencia, Tecnología e Innovación Productiva, Eusko Jaurlaritza, Institute for Basic Science, National Institute of Standards and Technology, Fourth Framework Programme, Agencia Estatal de Investigación, Department of Energy National Nuclear Security Administration Laboratory Residency Graduate Fellowship
Awards: G1409390629, G222768804, G2262748287, G2576297034, G2749341910, G3023601820, G3057251338, G3480869486, G3681454997, G4042783231, G425668148, G6426959905, G7084143925, THEORETICAL AND COMPUTATIONAL STUDIES OF CHARACTERISTICS OF METALLIC NANOSTRUCTURES, G8647214875, G8928059717, THEORETICAL AND COMPUTATIONAL STUDIES OF CHARACTERISTICS OF METALLIC NANOALLOYS
OpenAlex ID: W4415733760