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Search Results: 1 - 10 of 3766 matches for " Luisa Puddu "
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Love Styles in Couple Relationships: A Literature Review  [PDF]
Rosalba Raffagnino, Luisa Puddu
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.612027
Abstract: Love is a fundamental emotion in people’s lives, and also plays a vital role in human health. It is a multifaceted feeling, with different expressions in different life contexts. Its polysemy has been widely identified and analysed upon observing how the different styles of experiencing love have different effects on personal and relational health. This article presents a review of literature regarding the influence of the various love styles—identified by Lee [1]—on quality and duration of a love relationship, and how they may be predictors for the health and well-being of partners. Upon analysis of the various reviewed articles, it is recorded that the various love types and styles have different effects on various levels of quality and duration of the relationship between two people. On the basis of the results observed, the authors suggest numerous research priorities in order to facilitate the implementation of knowledge through actions targeted towards relational health and well-being.
Ab-initio calculation of the ${}^6Li$ binding energy with the Hybrid Multideterminant scheme
Giovanni Puddu
Physics , 2010, DOI: 10.1140/epja/i2010-11008-y
Abstract: We perform an ab-initio calculation for the binding energy of ${}^6Li$ using the CD-Bonn 2000 NN potential renormalized with the Lee-Suzuki method. The many-body approach to the problem is the Hybrid Multideterminant method. The results indicate a binding energy of about $31 MeV$, within a few hundreds KeV uncertainty. The center of mass diagnostics are also discussed.
A simple method to compute excitation energies in variational many-body calculations
Giovanni Puddu
Physics , 2011,
Abstract: We propose a simple, easy to implement, variant of the EXCITED method for variational many-body calculations for excited states. We apply this method to the Hybrid Multideterminant method(HMD). We test this method with relatively few Slater determinants by comparing the results with exact shell model calculations for ${}^{56}Ni$ using the $fpd6$ interaction. We obtain very good agreement with the exact results.
Extention of the Time-Dependent Multi-Determinant approach to propagators
Giovanni Puddu
Physics , 2013,
Abstract: We extend the recently proposed Time-Dependent Multi-Determinant approach (ref.[1]) to the description of fermionic propagators. The method hinges on equations of motions obtained using variational principles of Dirac type. In particular we focus on traces of imaginary time propagators, i.e. the partition function. The method is equally applicable with or without projectors to good quantum numbers.
Hybrid Multideterminant calculation of energy levels of carbon isotopes with a chiral effective nucleon-nucleon interaction
Giovanni Puddu
Physics , 2010, DOI: 10.5506/APhysPolB.42.1287
Abstract: We perform calculations for the binding energies and low-lying levels of ${}^{10,11,12,13,14,15,16,17,18,19,20,21,22}C$ nuclei starting from the chiral $N3LO$ nucleon-nucleon potential within the framework of the Hybrid Multideterminant scheme. The calculations are restricted to 4 major harmonic oscillator shells, via the Lee-Suzuki renormalization scheme. The results are compared with the experimental data.
About the sign ambiguity in the evaluation of Grand Canonical traces for quasi-particle statistical density operators
G. Puddu
Physics , 2009,
Abstract: A simple and general prescription for evaluating unambiguously the sign of the grand-canonical trace of quasi-particle statistical density operators (the so-called sign ambiguity in taking the square root of determinants) is given. Sign ambiguities of this kind appear in the evaluation of the grand-canonical partition function projected to good quantum numbers (angular momentum, parity and particle number) in the Hartree-Fock-Bogoliubov approximation at finite temperature, since traces are usually expressed as the square root of determinants. A comparison is made with the numerical continuity method.
Projected Thermal Hartree-Fock-Bogoliubov approximation in a canonical ensemble
Giovanni Puddu
Physics , 2011,
Abstract: The Thermal Hartree-Fock-Bogoliubov approximation with reprojection to good quantum numbers is analyzed in a canonical ensemble. Simple recipes are given for the evaluation of traces, gradients and expectation values in the canonical ensemble.
An efficient method to evaluate energy variances for extrapolation methods
G. Puddu
Physics , 2012, DOI: 10.1088/0954-3899/39/8/085108
Abstract: The energy variance extrapolation method consists in relating the approximate energies in many-body calculations to the corresponding energy variances and inferring eigenvalues by extrapolating to zero variance. The method needs a fast evaluation of the energy variances. For many-body methods that expand the nuclear wave functions in terms of deformed Slater determinants, the best available method for the evaluation of energy variances scales with the sixth power of the number of single-particle states. We propose a new method which depends on the number of single-particle orbits and the number of particles rather than the number of single-particle states. We discuss as an example the case of ${}^4He$ using the chiral N3LO interaction in a basis consisting up to 184 single-particle states.
Description of nuclei around N=20 starting from the Argonne V18 interaction
Giovanni Puddu
Physics , 2014, DOI: 10.1140/epja/i2015-15014-3
Abstract: Using the Argonne V18 interaction, renormalized with the Lee-Suzuki method, we study nuclei around the $N=20$ island of inversion. We include 5 major oscillator shells, in a no-core approach, using the Hybrid Multi-Determinant method reaching up to few hundreds Slater determinants. Although qualitatively in agreement with the experimental levels, the calculated BE2 do not show the same amount of collectivity seen experimentally.
A Time Dependent Multi-Determinant approach to nuclear dynamics
Giovanni Puddu
Physics , 2012, DOI: 10.1142/S0218301313500407
Abstract: We study a multi-determinant approach to the time evolution of the nuclear wave functions (TDMD). We employ the Dirac variational principle and use as anzatz for the nuclear wave-function a linear combination of Slater determinants and derive the equations of motion. We demonstrate explicitly that the norm of the wave function and the energy are conserved during the time evolution. This approach is a direct generalization of the time dependent Hartree-Fock method. We apply this approach to a case study of ${}^6Li$ using the N3LO interaction renormalized to 4 major harmonic oscillator shells. We solve the TDMD equations of motion using Krylov subspace methods of Lanczos type. We discuss as an application the isoscalar monopole strength function.
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