The Experts below are selected from a list of 159 Experts worldwide ranked by ideXlab platform
W F M Spit - One of the best experts on this subject based on the ideXlab platform.
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quark Antisymmetrization and deep inelastic scattering i nuclear quark momentum distributions
Nuclear Physics, 1994Co-Authors: W F M Spit, A G M Van Hees, P J Brussaard, P J MuldersAbstract:Abstract We consider the effects of quark Antisymmetrization for quark momentum distributions. The simple convolution of nucleon momentum distributions in a nucleus and quark momentum distribution in a nucleon in general does not satisfy the Pauli principle. Antisymmetrizing the product of wave functions in momentum space introduces additional contributions. This paper extends the results for s-wave nuclei to p-wave nuclei, showing that the effects of Antisymmetrization in that case are very small. The extension beyond the simple s-wave nuclei is important for the discussion of the role of Antisymmetrization in the ratio of deep-inelastic structure functions for nuclei and nucleons.
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quark Antisymmetrization and deep inelastic scattering ii nuclear structure functions
Nuclear Physics, 1994Co-Authors: H Meyer, P J Mulders, W F M SpitAbstract:Abstract We consider the effects of quark Antisymmetrization for nuclear structure functions. Antisymmetrizing the naive folding of nuclear wave functions in terms of nucleons and the nucleon wave function in terms of quarks, introduces additional contributions. Using the calculated results on quark three-momentum distributions, we calculate the effects on the deep-inelastic structure functions for s- and p-wave nuclei. The effects of quark Antisymmetrization turn out to be small.
P J Mulders - One of the best experts on this subject based on the ideXlab platform.
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quark Antisymmetrization and deep inelastic scattering i nuclear quark momentum distributions
Nuclear Physics, 1994Co-Authors: W F M Spit, A G M Van Hees, P J Brussaard, P J MuldersAbstract:Abstract We consider the effects of quark Antisymmetrization for quark momentum distributions. The simple convolution of nucleon momentum distributions in a nucleus and quark momentum distribution in a nucleon in general does not satisfy the Pauli principle. Antisymmetrizing the product of wave functions in momentum space introduces additional contributions. This paper extends the results for s-wave nuclei to p-wave nuclei, showing that the effects of Antisymmetrization in that case are very small. The extension beyond the simple s-wave nuclei is important for the discussion of the role of Antisymmetrization in the ratio of deep-inelastic structure functions for nuclei and nucleons.
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quark Antisymmetrization and deep inelastic scattering ii nuclear structure functions
Nuclear Physics, 1994Co-Authors: H Meyer, P J Mulders, W F M SpitAbstract:Abstract We consider the effects of quark Antisymmetrization for nuclear structure functions. Antisymmetrizing the naive folding of nuclear wave functions in terms of nucleons and the nucleon wave function in terms of quarks, introduces additional contributions. Using the calculated results on quark three-momentum distributions, we calculate the effects on the deep-inelastic structure functions for s- and p-wave nuclei. The effects of quark Antisymmetrization turn out to be small.
Yu M Tchuvilsky - One of the best experts on this subject based on the ideXlab platform.
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Antisymmetrization in the multicluster dynamic model of nuclei and the nucleon exchange effects
arXiv: Nuclear Theory, 1997Co-Authors: R A Eramzhyan, G G Ryzhikh, Yu M TchuvilskyAbstract:A modified version of the Multicluster Dynamic Model of nuclei is proposed to construct completely antisymmetrized wave functions of multicluster systems. An overlap kernel operator is introduced to renormalize the total wave function after Antisymmetrization between nucleons in different clusters. A group-theoretical method is developed to analyze the role of the exchange effects arising in the calculation of the various observables of multicluster systems due to this Antisymmetrization. The Antisymmetrized version of the Multicluster Dynamic Model is applied to the six-nucleon systems treating them as alpha-2N ones.The static and dynamic characteristics of the six-nucleon systems manifested in electron and pi-meson scattering, muon capture, beta-decay, pion photoproduction, etc., are calculated.
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properties of a six nucleon system in a multicluster dynamic model with Antisymmetrization
Nuclear Physics, 1993Co-Authors: G G Ryzhikh, R A Eramzhyan, V I Kukulin, Yu M TchuvilskyAbstract:Abstract A modification of the multicluster dynamic model with Pauli projection (MDMP) developed earlier for light nuclei is proposed. The modification consists in performing a total Antisymmetrization of the MDMP wave functions over all nucleons using a technique worked out for this purpose. The formal and physical consequences of the Antisymmetrization procedure, namely, the changes in the structure of the nuclear wave functions, the exchange effects in the electromagnetic and weak processes on six-nucleon (i.e. 6 He and 6 Li) nuclei, etc. are studied in detail. The exchange effects were shown to give the decisive contribution to the magnetic form factors at moderate and high momentum transfers. The general classification of the operators is carried out allowing one to determine before calculations the observables in which the exchange effects should be important and in which one can use the initial multicluster wave functions without their explicit Antisymmetrization. The developed model (AMDMP) makes it possible to reproduce successfully a large array of diverse experimental data on six-nucleon nuclei. The problem of the 6 Li quadrupole moment is also discussed.
A Hoglund - One of the best experts on this subject based on the ideXlab platform.
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algebraic rainich theory and Antisymmetrization in higher dimensions
Classical and Quantum Gravity, 2002Co-Authors: Goran Bergqvist, A HoglundAbstract:The classical Rainich(–Misner–Wheeler) theory gives necessary and sufficient conditions on an energy–momentum tensor T to be that of a Maxwell field (a 2-form) in four dimensions. Via Einstein's equations, these conditions can be expressed in terms of the Ricci tensor, thus providing conditions for a spacetime geometry to be an Einstein–Maxwell spacetime. One of the conditions is that T2 is proportional to the metric, and it has previously been shown in arbitrary dimension that any tensor satisfying this condition is a superenergy tensor of a simple p-form. Here we examine algebraic Rainich conditions for general p-forms in higher dimensions and their relations to identities by Antisymmetrization. Using Antisymmetrization techniques we find new identities for superenergy tensors of these general (non-simple) forms, and we also prove in some cases the converse: that the identities are sufficient to determine the form. As an example we obtain the complete generalization of the classical Rainich theory to five dimensions.
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dimensionally dependent tensor identities by double Antisymmetrization
Journal of Mathematical Physics, 2002Co-Authors: Brian S Edgar, A HoglundAbstract:Some years ago, Lovelock showed that a number of apparently unrelated familiar tensor identities had a common structure, and could all be considered consequences in n-dimensional space of a pair of fundamental identities involving trace-free (p,p)-forms where 2p⩾n. We generalize Lovelock’s results, and by using the fact that associated with any tensor in n-dimensional space there is associated a fundamental tensor identity obtained by antisymmetrizing over n+1 indices, we establish a very general “master” identity for all trace-free (k,l)-forms. We then show how various other special identities are direct and simple consequences of this master identity; in particular we give direct application to Maxwell, Lanczos, Ricci, Bel, and Bel-Robinson tensors, and also demonstrate how relationships between scalar invariants of the Riemann tensor can be investigated in a systematic manner.
A R Plastino - One of the best experts on this subject based on the ideXlab platform.
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entanglement generation through particle detection in systems of identical fermions
Annals of Physics, 2017Co-Authors: P A Bouvrie, A Valdeshernandez, A P Majtey, Claudia Zander, A R PlastinoAbstract:Abstract We investigate the generation of entanglement in systems of identical fermions through a process involving particle detection, focusing on the implications that these kindsof processes have for the concept of entanglement between fermionic particles. As a paradigmatic example we discuss in detail a scheme based on a splitting-plus-detection operation. The aim of this scheme is to generate states with a definite number of particles at two separated locations, that can effectively be described as entangled states of two distinguishable qubits, starting from an initial pure state of two indistinguishable fermions exhibiting correlations purely due to Antisymmetrization. It is argued that the proposed extraction of a useful entanglement-based resource, given by two distinguishable qubits entangled in the standard sense, does not contravene the notion of entanglement in identical-fermion systems as describing correlations beyond those purely due to their indistinguishability. In point of fact, it is shown that this concept of entanglement, here referred to as fermionic entanglement, actually helps to clarify some essential aspects of the entanglement generation process. In particular, we prove that the amount of entanglement exhibited by the above mentioned pair of distinguishable qubits, obtained after post-selection of a state having a definite number of particles in two separated locations, equals the amount of fermionic entanglement created by this detection process. The aforementioned scheme is generalized for the case of N -identical fermion systems of arbitrary dimension. It transpires from our present discussion that a proper analysis of entanglement generation during the splitting-plus-detection operation is not only consistent with the concept of fermionic entanglement, but actually reinforces it.
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entanglement generation through particle detection in systems of identical fermions
arXiv: Quantum Physics, 2016Co-Authors: P A Bouvrie, A Valdeshernandez, A P Majtey, Claudia Zander, A R PlastinoAbstract:We investigate the generation of entanglement in systems of identical fermions through a process involving particle detection, focusing on the implications that this kind of processes have for the concept of entanglement between fermionic particles. As a paradigmatic example we discuss in detail a scheme based on a splitting-plus-detection operation. This scheme generates states with accessible entanglement starting from an initial pure state of two indistinguishable fermions exhibiting correlations due purely to Antisymmetrization. It is argued that the proposed extraction of entanglement does not contravene the notion that entanglement in identical-fermion systems requires correlations beyond those purely due to their indistinguishability. In point of fact, it is shown that this concept of entanglement, here referred to as {\it fermonic entanglement}, actually helps to clarify some essential aspects of the entanglement generation process. In particular, we prove that the amount of extracted accessible entanglement equals the amount of fermionic entanglement created with the detection process. The aforementioned scheme is generalized for the case of $N$-identical fermion systems of arbitrary dimension. It transpires from our present discussion that a proper analysis of entanglement generation during the splitting-plus-detection operation is not only consistent with the concept of fermonic entanglement, but actually reinforces this concept.