The Experts below are selected from a list of 10023 Experts worldwide ranked by ideXlab platform
Paola Cappellaro - One of the best experts on this subject based on the ideXlab platform.
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measurement of transverse hyperfine interaction by Forbidden Transitions
Physical Review Letters, 2015Co-Authors: Mo Chen, Masashi Hirose, Paola CappellaroAbstract:(Received 14 April 2015; revised manuscript received 21 May 2015; published 6 July 2015) Precise characterization of a system’s Hamiltonian is crucial to its high-fidelity control that would enable many quantum technologies, ranging from quantum computation to communication and sensing. In particular, nonsecular parts of the Hamiltonian are usually more difficult to characterize, even if they can give rise to subtle but non-negligible effects. Here we present a strategy for the precise estimation of the transverse hyperfine coupling between an electronic and a nuclear spin, exploiting effects due to nominally Forbidden Transitions during the Rabi nutation of the nuclear spin. We applied the method to precisely determine the transverse coupling between a nitrogen-vacancy center electronic spin and its nitrogen nuclear spin. In addition, we show how this transverse hyperfine coupling, which has been often neglected in experiments, is crucial to achieving large enhancements of the nuclear Rabi nutation rate.
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Measurement of transverse hyperfine interaction by Forbidden Transitions
Physical Review B - Condensed Matter and Materials Physics, 2015Co-Authors: Mo Chen, Masashi Hirose, Paola CappellaroAbstract:Precise characterization of a system's Hamiltonian is crucial to its high-fidelity control that would enable many quantum technologies, ranging from quantum computation to communication and sensing. In particular, non-secular parts of the Hamiltonian are usually more difficult to characterize, even if they can give rise to subtle but non-negligible effects. Here we present a strategy for the precise estimation of the transverse hyperfine coupling between an electronic and a nuclear spin, exploiting effects due to Forbidden Transitions during the Rabi driving of the nuclear spin. We applied the method to precisely determine the transverse coupling between a Nitrogen-Vacancy center electronic spin and its Nitrogen nuclear spin. In addition, we show how this transverse hyperfine, that has been often neglected in experiments, is crucial to achieving large enhancements of the nuclear Rabi driving.
Takeshi Oka - One of the best experts on this subject based on the ideXlab platform.
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High-resolution spectroscopy of the 22Πu←X4Σg− Forbidden Transitions of C2+
The Journal of chemical physics, 2004Co-Authors: Christopher G. Tarsitano, Christopher F. Neese, Takeshi OkaAbstract:The electronic absorption spectrum of the (0,2), (1,3), and (6,9) bands of the B4Σu−−X4Σg− system of C2+ was obtained using the velocity modulation technique in conjunction with heterodyne detection. The rotationally resolved spectrum shows perturbations, which are attributed to the 22Πu state. The mixing between the B4Σu− state and the 22Πu state for nearly degenerate levels generated enough intensity borrowing to observe twenty 22Πu←X4Σg− Forbidden Transitions. The parameters of a model Hamiltonian were fit to the bands and their corresponding Forbidden Transitions. Line position measurements, line strength factors, and expectation values for the orbital angular momentum 〈Λ′〉 for the Forbidden Transitions are reported. Molecular parameters from the global fit of each band, including their corresponding Forbidden Transitions, are reported.
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high resolution spectroscopy of the 22πu x4σg Forbidden Transitions of c2
Journal of Chemical Physics, 2004Co-Authors: Christopher G. Tarsitano, Christopher F. Neese, Takeshi OkaAbstract:The electronic absorption spectrum of the (0,2), (1,3), and (6,9) bands of the B4Σu−−X4Σg− system of C2+ was obtained using the velocity modulation technique in conjunction with heterodyne detection. The rotationally resolved spectrum shows perturbations, which are attributed to the 22Πu state. The mixing between the B4Σu− state and the 22Πu state for nearly degenerate levels generated enough intensity borrowing to observe twenty 22Πu←X4Σg− Forbidden Transitions. The parameters of a model Hamiltonian were fit to the bands and their corresponding Forbidden Transitions. Line position measurements, line strength factors, and expectation values for the orbital angular momentum 〈Λ′〉 for the Forbidden Transitions are reported. Molecular parameters from the global fit of each band, including their corresponding Forbidden Transitions, are reported.
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Observation of infrared Forbidden Transitions of H3
Journal of Molecular Spectroscopy, 1992Co-Authors: M. Rosslein, Charles M. Gabrys, Takeshi OkaAbstract:Abstract The ν 1 ← 0 and ν 1 + ν 2 ← ν 2 Forbidden Transitions of H 3 + have been observed. The former is induced by the rovibrational Birss resonance between the ν 1 and ν 2 states and the latter by Fermi resonance. The observation leads us to the determination of absolute values of vibration-rotation energy levels related to the ν 1 and the ν 1 + ν 2 states. The assignment of the spectrum was constantly helped by “first principles calculations” of Miller, Tennyson, and Sutcliffe. We give an interpretation of the spectrum also based on the traditional vibration-rotation formalism.
Mo Chen - One of the best experts on this subject based on the ideXlab platform.
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measurement of transverse hyperfine interaction by Forbidden Transitions
Physical Review Letters, 2015Co-Authors: Mo Chen, Masashi Hirose, Paola CappellaroAbstract:(Received 14 April 2015; revised manuscript received 21 May 2015; published 6 July 2015) Precise characterization of a system’s Hamiltonian is crucial to its high-fidelity control that would enable many quantum technologies, ranging from quantum computation to communication and sensing. In particular, nonsecular parts of the Hamiltonian are usually more difficult to characterize, even if they can give rise to subtle but non-negligible effects. Here we present a strategy for the precise estimation of the transverse hyperfine coupling between an electronic and a nuclear spin, exploiting effects due to nominally Forbidden Transitions during the Rabi nutation of the nuclear spin. We applied the method to precisely determine the transverse coupling between a nitrogen-vacancy center electronic spin and its nitrogen nuclear spin. In addition, we show how this transverse hyperfine coupling, which has been often neglected in experiments, is crucial to achieving large enhancements of the nuclear Rabi nutation rate.
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Measurement of transverse hyperfine interaction by Forbidden Transitions
Physical Review B - Condensed Matter and Materials Physics, 2015Co-Authors: Mo Chen, Masashi Hirose, Paola CappellaroAbstract:Precise characterization of a system's Hamiltonian is crucial to its high-fidelity control that would enable many quantum technologies, ranging from quantum computation to communication and sensing. In particular, non-secular parts of the Hamiltonian are usually more difficult to characterize, even if they can give rise to subtle but non-negligible effects. Here we present a strategy for the precise estimation of the transverse hyperfine coupling between an electronic and a nuclear spin, exploiting effects due to Forbidden Transitions during the Rabi driving of the nuclear spin. We applied the method to precisely determine the transverse coupling between a Nitrogen-Vacancy center electronic spin and its Nitrogen nuclear spin. In addition, we show how this transverse hyperfine, that has been often neglected in experiments, is crucial to achieving large enhancements of the nuclear Rabi driving.
Takahito Nakajima - One of the best experts on this subject based on the ideXlab platform.
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Theoretical study on spin-Forbidden Transitions of osmium complexes by two-component relativistic time-dependent density functional theory
Chemical Physics Letters, 2016Co-Authors: Yutaka Imamura, Muneaki Kamiya, Takahito NakajimaAbstract:Abstract We study spin-Forbidden Transitions of Os polypyridyl sensitizers by two-component relativistic time-dependent density functional theory with the spin–orbit interaction based on Tamm–Dancoff approximation. The absorption spectra, including spin-Forbidden-transition peaks, for the Os complexes are reasonably reproduced in comparison with the experimental ones. The extension of the conjugated lengths in the Os complexes is investigated and found to be effective to enhance photo absorption for spin-allowed Transitions as well as spin-Forbidden ones. This study provides fruitful information for a design of new dyes in terms of conjugation lengths.
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Two-component relativistic time-dependent density functional theory study on spin-Forbidden Transitions for metal polypyridyl complexes
Chemical Physics Letters, 2015Co-Authors: Yutaka Imamura, Muneaki Kamiya, Takahito NakajimaAbstract:Abstract Spin-Forbidden Transitions of metal polypyridyl sensitizers are studied by the two-component relativistic time-dependent density functional theory with spin–orbit interaction based on Tamm–Dancoff approximation. The spin-Forbidden Transitions for a phosphine-coordinated Ru(II), DX1, as well as the modified DX1 complexes whose Ru is replaced with Fe and Os, are calculated. The role of the central metals in spin-Forbidden Transitions is discussed toward the exploration for new efficient sensitizers.
Yutaka Imamura - One of the best experts on this subject based on the ideXlab platform.
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Design of spin-Forbidden Transitions for polypyridyl metal complexes by time-dependent density functional theory including spin–orbit interaction
Physical chemistry chemical physics : PCCP, 2016Co-Authors: Shohei Kanno, Yutaka Imamura, Masahiko HadaAbstract:We explore spin-Forbidden Transitions for a Ru dye with an N3 skeleton and an Fe dye with a DX1 skeleton by time-dependent density functional theory with spin-orbit interaction. The modified N3-based Ru dye with iodine anions has an absorption edge in the long wavelength region which is not observed in the original N3 dye. The long wavelength absorption edge originates from the spin-orbit interaction with iodine. Although the Fe dye has a small spin-orbit interaction, because of less spin-orbit interaction from the light metal, spin-Forbidden Transitions also occur for DX1-based Fe dye systems with iodine anions. This result indicates that the introduction of iodine can strengthen the spin-orbit interaction for a dye sensitizer and offers a new approach for designing spin-Forbidden Transitions.
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Theoretical study on spin-Forbidden Transitions of osmium complexes by two-component relativistic time-dependent density functional theory
Chemical Physics Letters, 2016Co-Authors: Yutaka Imamura, Muneaki Kamiya, Takahito NakajimaAbstract:Abstract We study spin-Forbidden Transitions of Os polypyridyl sensitizers by two-component relativistic time-dependent density functional theory with the spin–orbit interaction based on Tamm–Dancoff approximation. The absorption spectra, including spin-Forbidden-transition peaks, for the Os complexes are reasonably reproduced in comparison with the experimental ones. The extension of the conjugated lengths in the Os complexes is investigated and found to be effective to enhance photo absorption for spin-allowed Transitions as well as spin-Forbidden ones. This study provides fruitful information for a design of new dyes in terms of conjugation lengths.
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Two-component relativistic time-dependent density functional theory study on spin-Forbidden Transitions for metal polypyridyl complexes
Chemical Physics Letters, 2015Co-Authors: Yutaka Imamura, Muneaki Kamiya, Takahito NakajimaAbstract:Abstract Spin-Forbidden Transitions of metal polypyridyl sensitizers are studied by the two-component relativistic time-dependent density functional theory with spin–orbit interaction based on Tamm–Dancoff approximation. The spin-Forbidden Transitions for a phosphine-coordinated Ru(II), DX1, as well as the modified DX1 complexes whose Ru is replaced with Fe and Os, are calculated. The role of the central metals in spin-Forbidden Transitions is discussed toward the exploration for new efficient sensitizers.