Nickel(II) Metal Complexes as Optically Addressable Qubit Candidates
Abstract
The inherent atomic level structural control of synthetic chemistry enables the creation of qubits, the base units of a quantum information science system, designed for a target application. For quantum sensing applications, enabling optical read-out of spin in tunable molecular systems, akin to defect-based systems, would be transformative. This approach would bring together molecular tunability with optical read-out technology. In theory, nickel ions in octahedral symmetry meet all the criteria for optical readout of spin. Yet, to the best of our knowledge, there are no pulse EPR studies on Ni2+ molecules. We identified two compounds featuring highly symmetric Ni2+ centers, thereby engendering weak zero-field splitting to enable EPR addressability:[Ni(phen)3](BF4)2 (1) and [Ni(pyr3)2](BF4)2 (2) (phen = 1,10-phenanthroline; pyr3 = tris-2-pyridyl-methane). Crucially, these complexes feature the requisite strong field ligands to enable emission for optical addressability. We extracted axial zero-field splitting parameters of D = +0.9 cm–1 and +2.7 cm–1 for 1 and 2, respectively, enabling pulse EPR measurements. Both compounds produce emission at λmax = 938–944 nm. Furthermore, the aggregate of these results expands the catalogue of qubit materials to Ni2+-based compounds and offers a future pathway for optical readout of these molecules.
- Authors:
-
[2];
[1]
- Northwesern University, Evanston, IL (United States)
- Northwesern University, Evanston, IL (United States); Argonne National Laboratory (ANL), Lemont, IL (United States)
- Publication Date:
- Research Org.:
- Northwestern Univ., Evanston, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF); State of Florida; State of Illinois; International Institute for Nanotechnology (IIN)
- OSTI Identifier:
- 1657169
- Alternate Identifier(s):
- OSTI ID: 1905113
- Grant/Contract Number:
- SC0019356; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the American Chemical Society
- Additional Journal Information:
- Journal Volume: 142; Journal Issue: 35; Journal ID: ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Qubits; quantum information science; spin; molecular tunability; optical readout; electron paramagnetic resonance spectroscopy; quantum mechanics; ligands; excited states; molecules
Citation Formats
Wojnar, Michael K., Laorenza, Daniel W., Schaller, Richard D., and Freedman, Danna E. Nickel(II) Metal Complexes as Optically Addressable Qubit Candidates. United States: N. p., 2020.
Web. doi:10.1021/jacs.0c06909.
Wojnar, Michael K., Laorenza, Daniel W., Schaller, Richard D., & Freedman, Danna E. Nickel(II) Metal Complexes as Optically Addressable Qubit Candidates. United States. https://doi.org/10.1021/jacs.0c06909
Wojnar, Michael K., Laorenza, Daniel W., Schaller, Richard D., and Freedman, Danna E. Mon .
"Nickel(II) Metal Complexes as Optically Addressable Qubit Candidates". United States. https://doi.org/10.1021/jacs.0c06909. https://www.osti.gov/servlets/purl/1657169.
@article{osti_1657169,
title = {Nickel(II) Metal Complexes as Optically Addressable Qubit Candidates},
author = {Wojnar, Michael K. and Laorenza, Daniel W. and Schaller, Richard D. and Freedman, Danna E.},
abstractNote = {The inherent atomic level structural control of synthetic chemistry enables the creation of qubits, the base units of a quantum information science system, designed for a target application. For quantum sensing applications, enabling optical read-out of spin in tunable molecular systems, akin to defect-based systems, would be transformative. This approach would bring together molecular tunability with optical read-out technology. In theory, nickel ions in octahedral symmetry meet all the criteria for optical readout of spin. Yet, to the best of our knowledge, there are no pulse EPR studies on Ni2+ molecules. We identified two compounds featuring highly symmetric Ni2+ centers, thereby engendering weak zero-field splitting to enable EPR addressability:[Ni(phen)3](BF4)2 (1) and [Ni(pyr3)2](BF4)2 (2) (phen = 1,10-phenanthroline; pyr3 = tris-2-pyridyl-methane). Crucially, these complexes feature the requisite strong field ligands to enable emission for optical addressability. We extracted axial zero-field splitting parameters of D = +0.9 cm–1 and +2.7 cm–1 for 1 and 2, respectively, enabling pulse EPR measurements. Both compounds produce emission at λmax = 938–944 nm. Furthermore, the aggregate of these results expands the catalogue of qubit materials to Ni2+-based compounds and offers a future pathway for optical readout of these molecules.},
doi = {10.1021/jacs.0c06909},
journal = {Journal of the American Chemical Society},
number = 35,
volume = 142,
place = {United States},
year = {Mon Aug 10 00:00:00 EDT 2020},
month = {Mon Aug 10 00:00:00 EDT 2020}
}
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