The Experts below are selected from a list of 23196 Experts worldwide ranked by ideXlab platform

L Scorzato - One of the best experts on this subject based on the ideXlab platform.

B K Sahoo - One of the best experts on this subject based on the ideXlab platform.

  • experimental determination of the nuclear magnetic octupole moment of137ba ion
    Physical Review A, 2013
    Co-Authors: Nicholas C Lewty, Boon Leng Chuah, Radu Cazan, M D Barrett, B K Sahoo
    Abstract:

    We perform precision measurements on the 5D$_{5/2}$ manifold hyperfine intervals of a single trapped ion, $^{137}$Ba$^+$. RF spectroscopy is used to measure the hyperfine intervals to an accuracy of a few Hz. Our results provide a three orders of magnitude improvement in accuracy over previous work and also provide a 10-fold improvement in the value of $g_J$ for this level. These results complement our previous work on the 5D$_{3/2}$ manifold of $^{137}$Ba$^+$, providing an independent measurement of the nuclear octupole, and a Consistency Check on atomic structure calculations.

  • experimental determination of the nuclear magnetic octupole moment of 137 ba ion
    Physical Review A, 2013
    Co-Authors: Nicholas C Lewty, Boon Leng Chuah, Radu Cazan, M D Barrett, B K Sahoo
    Abstract:

    We perform precision measurements on the $5{D}_{5/2}$ manifold hyperfine intervals of a single trapped ion, ${}^{137}$Ba${}^{+}$. rf spectroscopy is used to measure the hyperfine intervals to an accuracy of a few Hz. Our results provide a three orders of magnitude improvement in accuracy over previous work and also provide a 10-fold improvement in the value of ${g}_{J}$ for this level. These results complement our previous work on the 5${D}_{3/2}$ manifold of ${}^{137}$Ba${}^{+}$, providing an independent measurement of the nuclear octupole, and a Consistency Check on atomic structure calculations.

Thomas Thiemann - One of the best experts on this subject based on the ideXlab platform.

  • Consistency Check on volume and triad operator quantization in loop quantum gravity i
    Classical and Quantum Gravity, 2006
    Co-Authors: Kristina Giesel, Thomas Thiemann
    Abstract:

    In this paper, we provide the techniques and proofs for the results presented in our companion paper concerning the Consistency Check on volume and triad operator quantization in loop quantum gravity.

  • Consistency Check on volume and triad operator quantisation in loop quantum gravity i
    arXiv: General Relativity and Quantum Cosmology, 2005
    Co-Authors: Kristina Giesel, Thomas Thiemann
    Abstract:

    The volume operator plays a pivotal role for the quantum dynamics of Loop Quantum Gravity (LQG). It is essential in order to construct Triad operators that enter the Hamiltonian constraint and which become densely defined operators on the full Hilbert space even though in the classical theory the triad becomes singular when classical GR breaks down. The expression for the volume and triad operators derives from the quantisation of the fundamental electric flux operator of LQG by a complicated regularisation procedure. In fact, there are two inequivalent volume operators available in the literature and, moreover, both operators are unique only up to a finite, multiplicative constant which should be viewed as a regularisation ambiguity. Now on the one hand, classical volumes and triads can be expressed directly in terms of fluxes and this fact was used to construct the corresponding volume and triad operators. On the other hand, fluxes can be expressed in terms of triads and therefore one can also view the volume operator as fundamental and consider the flux operator as a derived operator. In this paper we examine whether the volume, triad and flux quantisations are consistent with each other. The results of this Consistency analysis are rather surprising. Among other findings we show: 1. The regularisation constant can be uniquely fixed. 2. One of the volume operators can be ruled out as inconsistent. 3. Factor ordering ambiguities in the definition of triad operators are immaterial for the classical limit of the derived flux operator. The results of this paper show that within full LQG triad operators are consistently quantized. In this paper we present ideas and results of the Consistency Check. In a companion paper we supply detailed proofs.

D D Tolla - One of the best experts on this subject based on the ideXlab platform.

  • interaction between m2 branes and bulk form fields
    Journal of High Energy Physics, 2010
    Co-Authors: Yoonbai Kim, Okab Kwon, Hiroaki Nakajima, D D Tolla
    Abstract:

    We construct the interaction terms between the world-volume fields of multiple M2-branes and the 3-and 6-form fields in the context of ABJM theory with U(N)×U(N) gauge symmetry. A Consistency Check is made in the simplest case of a single M2-brane i.e., our construction matches the known effective action of M2-brane coupled to antisymmetric 3-form field. We show that when dimensionally reduced, our couplings coincide with the effective action of D2-branes coupled to R-R 3-and 5-form fields in type IIA string theory. We also comment on the relation between a coupling with a specific 6-form field configuration and the supersymmetry preserving mass deformation in ABJM theory.

  • interaction between m2 branes and bulk form fields
    arXiv: High Energy Physics - Theory, 2010
    Co-Authors: Yoonbai Kim, Okab Kwon, Hiroaki Nakajima, D D Tolla
    Abstract:

    We construct the interaction terms between the world-volume fields of multiple M2-branes and the 3- and 6-form fields in the context of ABJM theory with U($N$)$\times$U($N$) gauge symmetry. A Consistency Check is made in the simplest case of a single M2-brane, i.e, our construction matches the known effective action of M2-brane coupled to antisymmetric 3-form field. We show that when dimensionally reduced, our couplings coincide with the effective action of D2-branes coupled to R-R 3- and 5-form fields in type IIA string theory. We also comment on the relation between a coupling with a specific 6-form field configuration and the supersymmetry preserving mass deformation in ABJM theory.

Hiroaki Nakajima - One of the best experts on this subject based on the ideXlab platform.

  • interaction between m2 branes and bulk form fields
    Journal of High Energy Physics, 2010
    Co-Authors: Yoonbai Kim, Okab Kwon, Hiroaki Nakajima, D D Tolla
    Abstract:

    We construct the interaction terms between the world-volume fields of multiple M2-branes and the 3-and 6-form fields in the context of ABJM theory with U(N)×U(N) gauge symmetry. A Consistency Check is made in the simplest case of a single M2-brane i.e., our construction matches the known effective action of M2-brane coupled to antisymmetric 3-form field. We show that when dimensionally reduced, our couplings coincide with the effective action of D2-branes coupled to R-R 3-and 5-form fields in type IIA string theory. We also comment on the relation between a coupling with a specific 6-form field configuration and the supersymmetry preserving mass deformation in ABJM theory.

  • interaction between m2 branes and bulk form fields
    arXiv: High Energy Physics - Theory, 2010
    Co-Authors: Yoonbai Kim, Okab Kwon, Hiroaki Nakajima, D D Tolla
    Abstract:

    We construct the interaction terms between the world-volume fields of multiple M2-branes and the 3- and 6-form fields in the context of ABJM theory with U($N$)$\times$U($N$) gauge symmetry. A Consistency Check is made in the simplest case of a single M2-brane, i.e, our construction matches the known effective action of M2-brane coupled to antisymmetric 3-form field. We show that when dimensionally reduced, our couplings coincide with the effective action of D2-branes coupled to R-R 3- and 5-form fields in type IIA string theory. We also comment on the relation between a coupling with a specific 6-form field configuration and the supersymmetry preserving mass deformation in ABJM theory.