Quadrupole Interaction

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Chaohui Ye - One of the best experts on this subject based on the ideXlab platform.

  • Spin-locking mechanism of spin I = 3/2 quadrupolar nuclei undergo magic angle spinning.
    Solid State Nuclear Magnetic Resonance, 2000
    Co-Authors: Yan Zhang, Feng Deng, Chaohui Ye
    Abstract:

    The spin-locking mechanism of the spin I = 3/2 quadrupolar nuclei under magic angle spinning (MAS) has been theoretically and experimentally investigated, and the criterion of adiabatic passage around zero-crossings of the Quadrupole splitting was inferred from the time-dependent Shrodinger equation in this article. The theory, numerical simulations, and experiments conducted in this work all indicated that second-order Quadrupole Interaction and off-resonance play important roles in the spin-locking of the quadrupolar nuclei, and they were responsible for the great loss of the spin-locking signals. The spin-locking for a spin I = 3/2 nucleus might be achieved by minimizing the effect of the second-order Quadrupole Interaction by using a radio frequency (RF) offset. This offset was realized by setting the RF to the opposite position of the isotropic second-order quadrupolar shift of single quantum coherences. (C) 2000 Elsevier Science B.V. All rights reserved.

  • Spin-locking mechanism of spin I = 3/2 quadrupolar nuclei undergo magic angle spinning.
    Solid State Nuclear Magnetic Resonance, 2000
    Co-Authors: Yan Zhang, Feng Deng, Chaohui Ye
    Abstract:

    Abstract The spin-locking mechanism of the spin I=3/2 quadrupolar nuclei under magic angle spinning (MAS) has been theoretically and experimentally investigated, and the criterion of adiabatic passage around zero-crossings of the Quadrupole splitting was inferred from the time-dependent Shrodinger equation in this article. The theory, numerical simulations, and experiments conducted in this work all indicated that second-order Quadrupole Interaction and off-resonance play important roles in the spin-locking of the quadrupolar nuclei, and they were responsible for the great loss of the spin-locking signals. The spin-locking for a spin I=3/2 nucleus might be achieved by minimizing the effect of the second-order Quadrupole Interaction by using a radio frequency (RF) offset. This offset was realized by setting the RF to the opposite position of the isotropic second-order quadrupolar shift of single quantum coherences.

Yan Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Spin-locking mechanism of spin I = 3/2 quadrupolar nuclei undergo magic angle spinning.
    Solid State Nuclear Magnetic Resonance, 2000
    Co-Authors: Yan Zhang, Feng Deng, Chaohui Ye
    Abstract:

    The spin-locking mechanism of the spin I = 3/2 quadrupolar nuclei under magic angle spinning (MAS) has been theoretically and experimentally investigated, and the criterion of adiabatic passage around zero-crossings of the Quadrupole splitting was inferred from the time-dependent Shrodinger equation in this article. The theory, numerical simulations, and experiments conducted in this work all indicated that second-order Quadrupole Interaction and off-resonance play important roles in the spin-locking of the quadrupolar nuclei, and they were responsible for the great loss of the spin-locking signals. The spin-locking for a spin I = 3/2 nucleus might be achieved by minimizing the effect of the second-order Quadrupole Interaction by using a radio frequency (RF) offset. This offset was realized by setting the RF to the opposite position of the isotropic second-order quadrupolar shift of single quantum coherences. (C) 2000 Elsevier Science B.V. All rights reserved.

  • Spin-locking mechanism of spin I = 3/2 quadrupolar nuclei undergo magic angle spinning.
    Solid State Nuclear Magnetic Resonance, 2000
    Co-Authors: Yan Zhang, Feng Deng, Chaohui Ye
    Abstract:

    Abstract The spin-locking mechanism of the spin I=3/2 quadrupolar nuclei under magic angle spinning (MAS) has been theoretically and experimentally investigated, and the criterion of adiabatic passage around zero-crossings of the Quadrupole splitting was inferred from the time-dependent Shrodinger equation in this article. The theory, numerical simulations, and experiments conducted in this work all indicated that second-order Quadrupole Interaction and off-resonance play important roles in the spin-locking of the quadrupolar nuclei, and they were responsible for the great loss of the spin-locking signals. The spin-locking for a spin I=3/2 nucleus might be achieved by minimizing the effect of the second-order Quadrupole Interaction by using a radio frequency (RF) offset. This offset was realized by setting the RF to the opposite position of the isotropic second-order quadrupolar shift of single quantum coherences.

Peter A Ivanov - One of the best experts on this subject based on the ideXlab platform.

  • compensation of the trap induced Quadrupole Interaction in trapped rydberg ions
    Scientific Reports, 2019
    Co-Authors: Lachezar S Simeonov, Nikolay V Vitanov, Peter A Ivanov
    Abstract:

    The Quadrupole Interaction between the Rydberg electronic states of a Rydberg ion and the radio frequency electric field of the ion trap is analyzed. Such a coupling is negligible for the lowest energy levels of a trapped ion but it is important for a trapped Rydberg ion due to its large electric Quadrupole moment. This coupling cannot be neglected by the standard rotating-wave approximation because it is comparable to the frequency of the trapping electric field. We investigate the effect of the Quadrupole coupling by performing a suitable effective representation of the Hamiltonian. For a single ion we show that in this effective picture the Quadrupole Interaction is replaced by rescaled laser intensities and additional Stark shifts of the Rydberg levels. Hence this detrimental Quadrupole coupling can be efficiently compensated by an appropriate increase of the Rabi frequencies. Moreover, we consider the strong dipole-dipole Interaction between a pair of Rydberg ions in the presence of the Quadrupole coupling. In the effective representation we observe reducing of the dipole-dipole coupling as well as additional spin-spin Interaction.

Feng Deng - One of the best experts on this subject based on the ideXlab platform.

  • Spin-locking mechanism of spin I = 3/2 quadrupolar nuclei undergo magic angle spinning.
    Solid State Nuclear Magnetic Resonance, 2000
    Co-Authors: Yan Zhang, Feng Deng, Chaohui Ye
    Abstract:

    The spin-locking mechanism of the spin I = 3/2 quadrupolar nuclei under magic angle spinning (MAS) has been theoretically and experimentally investigated, and the criterion of adiabatic passage around zero-crossings of the Quadrupole splitting was inferred from the time-dependent Shrodinger equation in this article. The theory, numerical simulations, and experiments conducted in this work all indicated that second-order Quadrupole Interaction and off-resonance play important roles in the spin-locking of the quadrupolar nuclei, and they were responsible for the great loss of the spin-locking signals. The spin-locking for a spin I = 3/2 nucleus might be achieved by minimizing the effect of the second-order Quadrupole Interaction by using a radio frequency (RF) offset. This offset was realized by setting the RF to the opposite position of the isotropic second-order quadrupolar shift of single quantum coherences. (C) 2000 Elsevier Science B.V. All rights reserved.

  • Spin-locking mechanism of spin I = 3/2 quadrupolar nuclei undergo magic angle spinning.
    Solid State Nuclear Magnetic Resonance, 2000
    Co-Authors: Yan Zhang, Feng Deng, Chaohui Ye
    Abstract:

    Abstract The spin-locking mechanism of the spin I=3/2 quadrupolar nuclei under magic angle spinning (MAS) has been theoretically and experimentally investigated, and the criterion of adiabatic passage around zero-crossings of the Quadrupole splitting was inferred from the time-dependent Shrodinger equation in this article. The theory, numerical simulations, and experiments conducted in this work all indicated that second-order Quadrupole Interaction and off-resonance play important roles in the spin-locking of the quadrupolar nuclei, and they were responsible for the great loss of the spin-locking signals. The spin-locking for a spin I=3/2 nucleus might be achieved by minimizing the effect of the second-order Quadrupole Interaction by using a radio frequency (RF) offset. This offset was realized by setting the RF to the opposite position of the isotropic second-order quadrupolar shift of single quantum coherences.

Lachezar S Simeonov - One of the best experts on this subject based on the ideXlab platform.

  • compensation of the trap induced Quadrupole Interaction in trapped rydberg ions
    Scientific Reports, 2019
    Co-Authors: Lachezar S Simeonov, Nikolay V Vitanov, Peter A Ivanov
    Abstract:

    The Quadrupole Interaction between the Rydberg electronic states of a Rydberg ion and the radio frequency electric field of the ion trap is analyzed. Such a coupling is negligible for the lowest energy levels of a trapped ion but it is important for a trapped Rydberg ion due to its large electric Quadrupole moment. This coupling cannot be neglected by the standard rotating-wave approximation because it is comparable to the frequency of the trapping electric field. We investigate the effect of the Quadrupole coupling by performing a suitable effective representation of the Hamiltonian. For a single ion we show that in this effective picture the Quadrupole Interaction is replaced by rescaled laser intensities and additional Stark shifts of the Rydberg levels. Hence this detrimental Quadrupole coupling can be efficiently compensated by an appropriate increase of the Rabi frequencies. Moreover, we consider the strong dipole-dipole Interaction between a pair of Rydberg ions in the presence of the Quadrupole coupling. In the effective representation we observe reducing of the dipole-dipole coupling as well as additional spin-spin Interaction.