Molecular spin qubits in a van der Waals bottle
Abstract
Advancing quantum information technologies requires qubits whose coherence can be precisely engineered. Among the qubit platforms in development, molecular spin qubits (MSQs) stand out for their atomic scale tunability and chemical specificity, making them powerful candidates for sensing, simulation, and information processing. However, integrating MSQs into solid-state architectures without degrading their coherence remains a central challenge. Here, we introduce van der Waals (vdW) confinement within two-dimensional materials as a strategy for stabilizing quantum states in MSQs by engineering their local electronic, vibrational, and symmetry environments. Using cobaltocene as a model system, we show that confinement within vdW SnS2 and CdPS3 single crystals reorganizes the single-ion energy landscape and slows spin-lattice relaxation by over two orders of magnitude relative to unconfined cobaltocene. The confined MSQs adopt deterministic orientations and self-assemble into ordered, atomically precise superlattices, establishing vdW confinement as a pathway for integrating MSQs into functional quantum devices.
Related
- Spin Kerr-cat qubits
- Grover Search with Semiconductor Spin Qubits at Ambient Conditions
- High-mobility spin transport mediated by indirect excitons in a van der Waals heterostructure
- Effects of residual exchange coupling on simultaneously driven spin qubits
- Interfacial Coupling Reshapes Nonlinear Polarization in a Spin-Defect van der Waals Heterostructure
BibTeX
@misc{champ2026molecular,
title = {{Molecular spin qubits in a van der Waals bottle}},
author = {Anna Champ and Eleanor Mackintosh and André Koch Liston and Sanghyo Lee and Eric D. Walter and Raphaël P. Hermann and George Yumnam and Eric Seewald and Xuehao Wu and Willa Mihalyi-Koch and Augustin Braun and Johan van Tol and Tomas Orlando and Mykhaylo Ozerov and Byeongjun Gil and Myung-Geun Han and Yimei Zhu and Miyoung Kim and Abhay N. Pasupathy and Milan Delor and Michael L. Steigerwald and Timothy C. Berkelbach and Colin Nuckolls and Xavier Roy and Arun Ramanathan},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.01872},
eprint = {2609.01872},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.01872},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Molecular spin qubits in a van der Waals bottle
AU - Anna Champ
AU - Eleanor Mackintosh
AU - André Koch Liston
AU - Sanghyo Lee
AU - Eric D. Walter
AU - Raphaël P. Hermann
AU - George Yumnam
AU - Eric Seewald
AU - Xuehao Wu
AU - Willa Mihalyi-Koch
AU - Augustin Braun
AU - Johan van Tol
AU - Tomas Orlando
AU - Mykhaylo Ozerov
AU - Byeongjun Gil
AU - Myung-Geun Han
AU - Yimei Zhu
AU - Miyoung Kim
AU - Abhay N. Pasupathy
AU - Milan Delor
AU - Michael L. Steigerwald
AU - Timothy C. Berkelbach
AU - Colin Nuckolls
AU - Xavier Roy
AU - Arun Ramanathan
PY - 2026
DA - 2026/09/14
PB - arXiv
DO - 10.48550/arxiv.2609.01872
UR - https://arxiv.org/abs/2609.01872
AB - Advancing quantum information technologies requires qubits whose coherence can be precisely engineered. Among the qubit platforms in development, molecular spin qubits (MSQs) stand out for their atomic scale tunability and chemical specificity, making them powerful candidates for sensing, simulation, and information processing. However, integrating MSQs into solid-state architectures without degrading their coherence remains a central challenge. Here, we introduce van der Waals (vdW) confinement within two-dimensional materials as a strategy for stabilizing quantum states in MSQs by engineering their local electronic, vibrational, and symmetry environments. Using cobaltocene as a model system, we show that confinement within vdW SnS2 and CdPS3 single crystals reorganizes the single-ion energy landscape and slows spin-lattice relaxation by over two orders of magnitude relative to unconfined cobaltocene. The confined MSQs adopt deterministic orientations and self-assemble into ordered, atomically precise superlattices, establishing vdW confinement as a pathway for integrating MSQs into functional quantum devices.
ER -