Increasing Explosive Power of the Shoulder in Volleyball Players

Dupuis, Cedric; Tourny-Chollet, Claire

doi:10.1519/1533-4295(2003)025<0007:iepots>2.0.co;2

Cited by 5 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This approach is discussed in detail in Ref. 41. The spin-particle-hole coherent-state path integral turns out to be a very convenient tool for studying spin waves about a broken-symmetry ground-state in the strong-coupling limit.…”

Section: Discussionmentioning

confidence: 99%

“…This approach, which is discussed at length in Ref. 41, can be justified by taking a "large-S" semiclassical limit of the Hubbard model. The spin- and z r↓ = √ 2S sin(θ r /2)e i 2 (ϕr−ψr) where the choice of ψ r is free and corresponds to the U(1) gauge freedom.…”

Section: Strong-coupling Diagrammatic Perturbation Theorymentioning

confidence: 99%

“…The action is then entirely determined by the single-particle atomic Green's function and the two-particle atomic vertex. (iii) We discuss in detail the strong-coupling perturbative expansion and briefly point out possible applications of our formalism which are developed in detail in separate publications 41,42 (Sec. III D).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new approach to strongly correlated fermion systems: the spin–particle–hole coherent-state path integral

Dupuis

2001

Nuclear Physics B

View full text Add to dashboard Cite

We describe a new path integral approach to strongly correlated fermion systems, considering the Hubbard model as a specific example. Our approach is based on the introduction of spinparticle-hole coherent states which generalize the spin-1 2 coherent states by allowing the creation of a hole or an additional particle. The action of the fermion system S[γ * , γ; Ω] can be expressed as a function of two Grassmann variables (γ ↑ ,γ ↓ ) describing particles propagating in the lower and upper Hubbard bands, and a unit vector field Ω whose dynamics arises from spin fluctuations. In the strong correlation limit, S[γ * , γ; Ω] can be truncated to quartic order in the fermionic fields and used as the starting point of a strong-coupling diagrammatic expansion in t/U (t being the intersite hopping amplitude and U the on-site Coulomb repulsion). We discuss possible applications of this formalism and its connection to the t-J model and the spin-fermion model.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Strong-coupling Diagrammatic Perturbation Theorymentioning

confidence: 99%

See 1 more Smart Citation

A new approach to strongly correlated fermion systems: the spin–particle–hole coherent-state path integral

Dupuis

2001

Nuclear Physics B

View full text Add to dashboard Cite

show abstract

“…Flows with the coupling to composite operators have been considered in e.g. [21,41,77,[79][80][81][82]. Flows for the 2PI effective action have been studied in [77,79,82].…”

Section: B Composite Operators and N Pi Flowsmentioning

confidence: 99%

“…In theories with a complicated phase structure this might necessitate introducing a large number of vertices to the effective action in terms of the fundamental fields. A way to avoid such a drawback is to reparameterise the theory in terms of the relevant degrees of freedom [41,[72][73][74][75][76][78][79][80][81][82].…”

Section: Truncation Schemes and Optimisationmentioning

confidence: 99%

Aspects of the functional renormalisation group

2007

View full text Add to dashboard Cite

We discuss structural aspects of the functional renormalisation group. Flows for a general class of correlation functions are derived, and it is shown how symmetry relations of the underlying theory are lifted to the regularised theory. A simple equation for the flow of these relations is provided. The setting includes general flows in the presence of composite operators and their relation to standard flows, an important example being N PI quantities. We discuss optimisation and derive a functional optimisation criterion.Applications deal with the interrelation between functional flows and the quantum equations of motion, general Dyson-Schwinger equations. We discuss the combined use of these functional equations as well as outlining the construction of practical renormalisation schemes, also valid in the presence of composite operators. Furthermore, the formalism is used to derive various representations of modified symmetry relations in gauge theories, as well as to discuss gauge-invariant flows. We close with the construction and analysis of truncation schemes in view of practical optimisation.

show abstract