Certifying entanglement of spins on surfaces using ESR-STM

• URL: http://arxiv.org/abs/2211.14205v3
• Date: Tue, 20 Dec 2022 14:28:42 GMT
• Title: Certifying entanglement of spins on surfaces using ESR-STM
• Abstract summary: We propose a protocol to certify the presence of entanglement in artificial on-surface atomic and molecular spin arrays. We first generalize the theorem that relates global spin susceptibility as an entanglement witness to the case of anisotropic Zeeman interactions. We then propose a method to measure the spin susceptibilities of surface-spin arrays combining ESR-STM with atomic manipulation.
• Score: 0.6303733605245639
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a protocol to certify the presence of entanglement in artificial on-surface atomic and molecular spin arrays using electron spin resonance carried by scanning tunnel microscopes (ESR-STM). We first generalize the theorem that relates global spin susceptibility as an entanglement witness to the case of anisotropic Zeeman interactions, relevant for surfaces. We then propose a method to measure the spin susceptibilities of surface-spin arrays combining ESR-STM with atomic manipulation. Our calculations show that entanglement can be certified in antiferromagnetically coupled spin dimers and trimers with state of the art ESR-STM magnetometry.

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