Author pages are created from data sourced from our academic publisher partnerships and public sources.

Publications Influence

The geometry of N = 2 Maxwell-Einstein supergravity and Jordan algebras

- M. Günaydin, G. Sierra, P. Townsend
- Physics
- 6 August 1984

We construct the general coupling of nN = 2 Maxwell super-multiplets to N = 2 supergravity in five spacetime dimensions. In the case that the scalar field manifold is symmetric we find a complete… Expand

544 42

Exceptional Supergravity Theories and the MAGIC Square

- M. Günaydin, G. Sierra, P. Townsend
- Physics
- 8 December 1983

Abstract We derive the magic square of Freudenthal, Rozenfeld, and Tits from the geometry of a special class of N =2 Maxwell-Einstein supergravity theories. We also show that all of these theories… Expand

274 29

Gauging the d = 5 Maxwell-Einstein Supergravity Theories: More on Jordan Algebras

- M. Günaydin, G. Sierra, P. Townsend
- Physics
- 1985

Abstract We discuss in detail the possible gaugings, abelian and non-abelian, of a class of d = 5 Maxwell/Einstein supergravity theories for which the manifold of scalar fields is a symmetric coset… Expand

343 29

Supersymmetry in six dimensions

- P. Howe, G. Sierra, P. Townsend
- Physics
- 11 July 1983

Abstract We present off-shell formulations of six-dimensional supersymmetric matter and gauge theories in superspace. We construct the maximally supersymmetric YM theory in terms of d = 6… Expand

213 15

Quantum Groups in Two-Dimensional Physics

- C. Gómez, M. Ruiz-Altaba, G. Sierra
- Physics
- 26 April 1996

Preface 1. S-matrices, spin chains and vertex models 2. The Yang-Baxter equation - a first look 3. Bethe ansatz - some examples 4. The eight-vertex model 5. Face models 6. Quantum groups -… Expand

202 12- PDF

Entanglement of low-energy excitations in conformal field theory.

- F. Alcaraz, Miguel Ibáñez Berganza, G. Sierra
- Physics, Medicine
- Physical review letters
- 14 January 2011

In a quantum critical chain, the scaling regime of the energy and momentum of the ground state and low-lying excitations are described by conformal field theory (CFT). The same holds true for the von… Expand

119 11- PDF

Entanglement of excited states in critical spin chains

- Miguel Ibanez de Berganza, F. Alcaraz, G. Sierra
- Physics
- 26 September 2011

R?nyi and von Neumann entropies quantifying the amount of entanglement in ground states of critical spin chains are known to satisfy a universal law which is given by the conformal field theory (CFT)… Expand

60 9- PDF

The unitary supermultiplets of d = 3 anti-de Sitter and d = 2 conformal superalgebras

- M. Günaydin, G. Sierra, P. Townsend
- Physics
- 15 September 1986

We classify the d = 3 anti-de Sitter and d = 2 conformal superalgebras and give a general construction of their positive energy unitary representations. The corresponding supergroups are in general… Expand

73 8

Equivalence of the variational matrix product method and the density matrix renormalization group applied to spin chains

- J.Dukelsky, M. Martin-Delgado, T. Nishino, G. Sierra
- Physics
- 29 October 1997

We study the relationship between the Density Matrix Renormalization Group (DMRG) and the variational matrix product method (MPM). In the latter method one can also define a density matrix whose… Expand

132 7- PDF

Colloquium: Exactly solvable Richardson-Gaudin models for many-body quantum systems

- J. Dukelsky, S. Pittel, G. Sierra
- Physics
- 5 May 2004

The use of exactly solvable Richardson-Gaudin models to describe the physics of systems with strong pair correlations is reviewed. The article begins with a brief discussion of Richardson's early… Expand

236 5- PDF

...

1

2

3

4

5

...