Stationary BPS Solutions in N = 2 Supergravity with R2-Interactions (2009)
Gabriel Lopes Cardoso, Bernard De Wit, Thomas Mohaupt, Gabriel Lopes Cardoso, Thomas Mohaupt
Preprint typeset in JHEP style.- PAPER VERSION SPIN-00/21 ITP-UU-00/24 SU-ITP 00/19 hep-th/0009234
The Erwin, Schrodinger International Boltzmanngasse, Gabriel Lopes Cardoso, Gabriel Lopes Cardoso, Bernard De Wit, Bernard De Wit, ...
Preprint typeset in JHEP style.- PAPER VERSION SPIN-00/21
Non-Perturbative Monodromies In (2007)
Heterotic String, Non-perturbative Monodromies, In N Heterotic, Gabriel Lopes Cardoso, Dieter Lust, Thomas Mohaupt
We address non-perturbative effects and duality symmetries in N = 2 heterotic string theories in four dimensions. Specifically, we consider how each of the four lines of enhanced gauge symmetries in...
Gabriel Lopes Cardoso, Dieter Lust, Thomas Mohaupt
z We discuss recent results on orbifold compactifications including all untwisted moduli, emphasizing the local complex Kahler structure of the moduli space. 1
First-order flow equations for extremal black holes in very special geometry (2007)
Cardoso, Gabriel Lopes, Ceresole, Anna, Dall'Agata, Gianguido, Oberreuter, Johannes M., Perz, Jan
We construct interpolating solutions describing single-center static extremal non-supersymmetric black holes in four-dimensional N=2 supergravity theories with cubic prepotentials. To this end, we...
Entropy function for rotating extremal black holes in very special geometry (2007)
Cardoso, Gabriel Lopes, Oberreuter, Johannes M., Perz, Jan
We use the relation between extremal black hole solutions in five- and in four-dimensional N=2 supergravity theories with cubic prepotentials to define the entropy function for extremal black holes...
Entropy function for rotating extremal black holes in very special geometry (2007)
Cardoso, Gabriel Lopes, Oberreuter, Johannes M., Perz, Jan
We use the relation between extremal black hole solutions in five- and in four-dimensional N=2 supergravity theories with cubic prepotentials to define the entropy function for extremal black holes...
First-order flow equations for extremal black holes in very special geometry (2007)
Cardoso, Gabriel Lopes, Ceresole, Anna, Dall'Agata, Gianguido, Oberreuter, Johannes M., Perz, Jan
We construct interpolating solutions describing single-center static extremal non-supersymmetric black holes in four-dimensional N=2 supergravity theories with cubic prepotentials. To this end, we...
Extremal non-BPS black holes and entropy extremization (2006)
Cardoso, Gabriel Lopes, Grass, Viviane, Lust, Dieter, Perz, Jan
At the horizon, a static extremal black hole solution in N=2 supergravity in four dimensions is determined by a set of so-called attractor equations which, in the absence of higher-curvature...
Entropy Maximization in the Presence of Higher-Curvature Interactions (2006)
Cardoso, Gabriel Lopes, Lust, Dieter, Perz, Jan
Within the context of the entropic principle, we consider the entropy of supersymmetric black holes in N=2 supergravity theories in four dimensions with higher-curvature interactions, and we discuss...
Entropy Maximization in the Presence of Higher-Curvature Interactions (2006)
Cardoso, Gabriel Lopes, Lust, Dieter, Perz, Jan
Within the context of the entropic principle, we consider the entropy of supersymmetric black holes in N=2 supergravity theories in four dimensions with higher-curvature interactions, and we discuss...
Extremal non-BPS black holes and entropy extremization (2006)
Cardoso, Gabriel Lopes, Grass, Viviane, Lust, Dieter, Perz, Jan
At the horizon, a static extremal black hole solution in N=2 supergravity in four dimensions is determined by a set of so-called attractor equations which, in the absence of higher-curvature...
Exploring the relation between 4D and 5D BPS solutions (2005)
Behrndt, Klaus, Cardoso, Gabriel Lopes, Mahapatra, Swapna
Based on recent proposals linking four and five-dimensional BPS solutions, we discuss the explicit dictionary between general stationary 4D and 5D supersymmetric solutions in N=2 supergravity...
The holographic RG flow in a field theory on a curved background (2002)
Cardoso, Gabriel Lopes, Lust, Dieter
As shown by Freedman, Gubser, Pilch and Warner, the RG flow in ${\cal N}=4$ super-Yang-Mills theory broken to an ${\cal N}=1$ theory by the addition of a mass term can be described in terms of a...
Curved BPS domain walls and RG flow in five dimensions (2002)
Cardoso, Gabriel Lopes, Dall'Agata, Gianguido, Lust, Dieter
We determine, in the context of five-dimensional ${\cal N}=2$ gauged supergravity with vector and hypermultiplets, the conditions under which curved (non Ricci flat) supersymmetric domain wall...
Curved BPS domain wall solutions in five-dimensional gauged supergravity (2001)
Cardoso, Gabriel Lopes, Dall'Agata, Gianguido, Lust, Dieter
We analyze the possibility of constructing supersymmetric curved domain wall solutions in five-dimensional ${\cal N}=2$ gauged supergravity, which are supported by non-constant scalar fields...
Curved BPS domain wall solutions in four-dimensional N=2 supergravity (2001)
Behrndt, Klaus, Cardoso, Gabriel Lopes, Lust, Dieter
We construct four-dimensional domain wall solutions of N=2 gauged supergravity coupled to vector and to hypermultiplets. The gauged supergravity theories that we consider are obtained by performing...
Stationary BPS Solutions in $N=2$ Supergravity with $R^2$-Interactions (2000)
Gabriel Lopes Cardoso, Bernard De Wit, Juerg Kaeppeli, Thomas Mohaupt
Stationary BPS Solutions in $N=2$ Supergravity with $R^2$-Interactions (2000)
Gabriel Lopes Cardoso, Bernard De Wit, Juerg Kaeppeli, Thomas Mohaupt
Stationary BPS Solutions in N = 2 Supergravity with R 2 –Interactions (2000)
The Erwin, Schrödinger International Boltzmanngasse, Gabriel Lopes Cardoso, Bernard De Wit, Thomas Mohaupt, Gabriel Lopes Cardoso, ...
hep-th/0009234 Stationary BPS Solutions in N = 2 Supergravity with R 2-Interactions
Area law corrections from state counting and supergravity (1999)
Cardoso, Gabriel Lopes, De Wit, Bernard, Mohaupt, Thomas
Modifications of the Bekenstein-Hawking area law for black holes are crucial in order to find agreement between the microscopic entropy based on state counting and the macroscopic entropy based on an...
Macroscopic entropy formulae and non-holomorphic corrections for supersymmetric black holes (1999)
Cardoso, Gabriel Lopes, De Wit, Bernard, Mohaupt, Thomas
In four-dimensional N=2 compactifications of string theory or M-theory, modifications of the Bekenstein-Hawking area law for black hole entropy in the presence of higher-derivative interactions are...
Deviations from the Area Law for Supersymmetric Black Holes (1999)
Cardoso, Gabriel Lopes, De Wit, Bernard, Mohaupt, Thomas
We review modifications of the Bekenstein-Hawking area law for black hole entropy in the presence of higher-derivative interactions. In four-dimensional N=2 compactifications of string theory or...
Area Law Corrections From State Counting and Supergravity (1999)
Gabriel Lopes Cardoso, Bernard De Wit, Thomas Mohaupt
. Modifications of the Bekenstein-Hawking area law for black holes are crucial in order to find agreement between the microscopic entropy based on state counting and the macroscopic entropy based on...
Deviations from the Area Law for Supersymmetric Black Holes (1999)
Gabriel Lopes Cardoso, Bernard De Wit, Thomas Mohaupt
We review modifications of the Bekenstein-Hawking area law for black hole entropy in the presence of higher-derivative interactions. In four-dimensional N = 2 compactifications of string theory or...
Macroscopic Entropy Formulae and Non-Holomorphic Corrections for Supersymmetric Black Holes (1999)
Gabriel Lopes Cardoso, Bernard De Wit, Thomas Mohaupt
In four-dimensional N = 2 compactifications of string theory or M-theory, modifications of the Bekenstein-Hawking area law for black hole entropy in the presence of higher-derivative interactions are...
Corrections to macroscopic supersymmetric black-hole entropy (1998)
Cardoso, Gabriel Lopes, De Wit, Bernard, Mohaupt, Thomas
We determine the corrections to the entropy of extremal black holes arising from terms quadratic in the Riemann tensor in $N=2, D=4$ supergravity theories. We follow Wald's proposal to modify the...
Dual Heterotic Black-Holes in Four and Two Dimensions (1998)
Cardoso, Gabriel Lopes, Mohaupt, Thomas
We consider a class of extremal and non-extremal four-dimensional black-hole solutions occuring in toroidally compactified heterotic string theory, whose ten-dimensional interpretation involves a...
Charged Heterotic Black-Holes in Four and Two Dimensions (1998)
We consider four-dimensional charged black-holes occuring in toroidally compactified heterotic string theory, whose ten-dimensional interpretation involves a Kaluza-Klein monopole and a five-brane....
Three-dimensional solutions of M-theory on $S^1/Z_2 \times T_7$ (1998)
We review various three-dimensional solutions in the low-energy description of M-theory on $S^1/Z_2 \times T_7$. These solutions have an eleven dimensional interpretation in terms of intersecting...
Higher-Order Black-Hole Solutions in N=2 Supergravity and Calabi-Yau String Backgrounds (1998)
Behrndt, Klaus, Cardoso, Gabriel Lopes, De Wit, Bernard, Lüst, Dieter, Mohaupt, Thomas, Sabra, Wafic A.
Based on special geometry, we consider corrections to N=2 extremal black-hole solutions and their entropies originating from higher-order derivative terms in N=2 supergravity. These corrections are...
Corrections to Macroscopic Supersymmetric Black-Hole Entropy (1998)
Gabriel Lopes Cardoso, Bernard De Wit, Thomas Mohaupt
We determine the corrections to the entropy of extremal black holes arising from terms quadratic in the Riemann tensor in N = 2; D = 4 supergravity theories. We follow Wald's proposal to modify...
Higher-Order Black-Hole Solutions in N = 2 Supergravity and Calabi-Yau String Backgrounds (1998)
Klaus Behrndt, Gabriel Lopes Cardoso, Bernard De Wit, Thomas Mohaupt, Dieter Lust, Wafic A. Sabra
Based on special geometry, we consider corrections to N = 2 extremal blackhole solutions and their entropies originating from higher-order derivative terms in N = 2 supergravity. These corrections...
Dual Heterotic Black-Holes in Four and Two Dimensions (1998)
Gabriel Lopes Cardoso, Thomas Mohaupt
We consider a class of extremal and non-extremal four-dimensional black-hole solutions occuring in toroidally compactified heterotic string theory, whose ten-dimensional interpretation involves a...
Finite Energy Solutions in Three-Dimensional Heterotic String Theory (1997)
Bourdeau, Michele, Cardoso, Gabriel Lopes
We show that a large class of supersymmetric solutions to the low-energy effective field theory of heterotic string theory compactified on a seven torus can have finite energy, which we compute. The...
Supersymmetric Solutions in Three-Dimensional Heterotic String Theory (1997)
Bakas, Ioannis, Bourdeau, Michele, Cardoso, Gabriel Lopes
We consider the low-energy effective field theory of heterotic string theory compactified on a seven-torus, and we construct electrically charged as well as more general solitonic solutions. These...
On the Duality between the Heterotic String and F-Theory in 8 Dimensions (1996)
Cardoso, Gabriel Lopes, Curio, Gottfried, Lust, Dieter, Mohaupt, Thomas
In this note we compare the moduli spaces of the heterotic string compactified on a two-torus and F-Theory compactified on an elliptic K3 surface for the case of an unbroken E8 x E8 gauge group. The...
Perturbative Couplings and Modular Forms in N=2 String Models with a Wilson Line (1996)
Cardoso, Gabriel Lopes, Curio, Gottfried, Lust, Dieter
We consider a class of four parameter D=4, N=2 string models, namely heterotic strings compactified on K3 times T2 together with their dual type II partners on Calabi-Yau three-folds. With the help...
Modular Symmetries of N=2 Black Holes (1996)
Cardoso, Gabriel Lopes, Lust, Dieter, Mohaupt, Thomas
We discuss the transformation properties of classical extremal N=2 black hole solutions in S-T-U like models under S and T duality. Using invariants of (subgroups of) the triality group, which is the...
De Wit, Bernard, Cardoso, Gabriel Lopes, Lüst, Dieter, Mohaupt, Thomas, Rey, Soo-Jong
The restrictions of target--space duality are imposed at the perturbative level on the holomorphic Wilsonian couplings that encode certain higher-order gravitational interactions in $N=2, D=4$...
Instanton Numbers and Exchange Symmetries in $N=2$ Dual String Pairs (1996)
Cardoso, Gabriel Lopes, Curio, Gottfried, Lüst, Dieter, Mohaupt, Thomas
In this note, we comment on Calabi-Yau spaces with Hodge numbers $h_{1,1}=3$ and $h_{2,1}=243$. We focus on the Calabi-Yau space $WP_{1,1,2,8,12}(24)$ and show how some of its instanton numbers are...
Perturbative and non-perturbative monodromies in N=2 heterotic string vacua (1996)
Cardoso, Gabriel Lopes, Lüst, Dieter, Mohaupt, Thomas
In this talk we summarise our recent results on perturbative and non-perturbative monodromies in four-dimensional heterotic strings with $N=2$ space-time supersymmetry, and we compare our results...
Modular Symmetries Of N=2 Black Holes (1996)
N Black Holes, Dieter Lüst, Gabriel Lopes Cardoso, Thomas Mohaupt
We discuss the transformation properties of classical extremal N = 2 black hole solutions in S-T -U like models under S and T duality. Using invariants of (subgroups of) the triality group, which is...
Perturbative and non-perturbative monodromies in N=2 heterotic string vacua (1996)
Gabriel Lopes Cardoso, Dieter Lüst, Thomas Mohaupt, Weyl Reflections
this paper, only consider the T = U 6= 1; ae
On The Duality Between The Heterotic String And F-Theory In 8 Dimensions (1996)
Gabriel Lopes Cardoso, Gottfried Curio, Dieter Lüst, Thomas Mohaupt
In this note we compare the moduli spaces of the heterotic string compactified on a two--torus and F--Theory compactified on an elliptic K3 surface for the case of an unbroken E 8 \Theta E 8 gauge...
Classical And Quantum N = 2 Supersymmetric Black Holes (1996)
Black Holes, Klaus Behrndt, Gabriel Lopes Cardoso, Bernard De Wit, Dieter Lüst, Renata Kallosh, ...
We use heterotic/type-II prepotentials to study quantum/classical black holes with half the N = 2; D = 4 supersymmetries unbroken. We show that, in the case of heterotic string compactifications, the...
Instanton Numbers and Exchange Symmetries in N=2 Dual String Pairs (1996)
Gabriel Lopes Cardoso, Gottfried Curio, Dieter Lüst, Thomas Mohaupt
In this note, we comment on Calabi-Yau spaces with Hodge numbers h 1;1 = 3 and h 2;1 = 243. We focus on the Calabi-Yau space WP 1;1;2;8;12 (24) and show how some of its instanton numbers are related...
BPS Spectra and Non--Perturbative Couplings in N=2,4 Supersymmetric String Theories (1995)
Cardoso, Gabriel Lopes, Curio, Gottfried, Lust, Dieter, Mohaupt, Thomas, Rey, Soo-Jong
We study the BPS spectrum in $D=4, N=4$ heterotic string compactifications, with some emphasis on intermediate $N=4$ BPS states. These intermediate states, which can become short in $N=2$...
Non-perturbative monodromies in N=2 heterotic string vacua (1995)
Cardoso, Gabriel Lopes, Lüst, Dieter, Mohaupt, Thomas
We address non-perturbative effects and duality symmetries in $N=2$ heterotic string theories in four dimensions. Specifically, we consider how each of the four lines of enhanced gauge symmetries in...
Perturbative and Non-Perturbative Results for N=2 Heterotic Strings (1995)
Gabriel Lopes Cardoso, Dieter Lüst, Thomas Mohaupt
this paper we summarize our recent work about perturbative and non-perturbative effects in four-dimensional heterotic strings with N = 2 space-time supersymmetry. 1. Introduction
Gabriel Lopes Cardoso, Gottfried Curio, Dieter Lüst, Thomas Mohaupt, Soo-jong Rey
We study the BPS spectrum in D = 4; N = 4 heterotic string compactifications, with some emphasis on intermediate N = 4 BPS states. These intermediate states, which can become short in N = 2...
Threshold Corrections and Symmetry Enhancement in String Compactifications (1994)
Cardoso, Gabriel Lopes, Lüst, Dieter, Mohaupt, Thomas
We present the computation of threshold functions for Abelian orbifold compactifications. Specifically, starting from the massive, moduli-dependent string spectrum after compactification, we derive...
Some Results on (0,2) Z_N Orbifold Theories with Continuous Wilson Lines (1994)
Cardoso, Gabriel Lopes, Lust, Dieter, Mohaupt, Thomas
We discuss recent results on orbifold compactifications with (0,2) world sheet supersymmetry and continuous Wilson lines, emphasizing the role of modular symmetries. (This work is a contribution to...
Cardoso, Gabriel Lopes, Lüst, Dieter
In this letter we discuss the relation of four-dimensional, $N=2$ supersymmetric string backgrounds to integrable models. In particular we show that non-K\"ahlerian gravitational backgrounds with one...
Cardoso, Gabriel Lopes, Lüst, Dieter, Ovrut, Burt A.
It is pointed out that massive states in D=4, N=1 supergravity-matter theories can, in general, at the 1-loop level contribute non-holomorphic terms to quadratic gravitational couplings. It is then...
Threshold Corrections And Symmetry Enhancement In String Compactifications (1994)
Gabriel Lopes Cardoso, Dieter Lüst, Thomas Mohaupt
We present the computation of threshold functions for Abelian orbifold compactifications. Specifically, starting from the massive, moduli-dependent string spectrum after compactification, we derive...
Gabriel Lopes Cardoso, Dieter Lüst, Thomas Monhaupt
We present the coset structure of the untwisted moduli space of heterotic (0; 2) ZN orbifold compactifications with continuous Wilson lines. For the cases where the internal 6-torus T 6 is given by...
Some Results On (0,2) Z_N Orbifold Theories WITH CONTINUOUS WILSON LINES (1994)
Gabriel Lopes Cardoso, DIETER Lüst, Dieter L, Thomas Mohaupt
We discuss recent results on orbifold compactifications with (0,2) world sheet supersymmetry and continuous Wilson lines, emphasizing the role of modular symmetries. 1. Introduction Orbifold...
Duality Symmetries and Supersymmetry Breaking in String Compactifications (1994)
Gabriel Lopes Cardoso, Dieter Lüst, Thomas Monhaupt
We discuss the spontaneous supersymetry breaking within the low-energy effective supergravity action of four-dimensional superstrings. In particular, we emphasize the non-universality of the soft...
Supersymmetric Calculation of Mixed K\"{a}HLER-Gauge and Mixed K\"{a}HLER-Lorentz Anomalies (1993)
Cardoso, Gabriel Lopes, Ovrut, Burt A.
We present a manifestly supersymmetric procedure for calculating the contributions from matter loops to the mixed K\"{a}hler-gauge and to the mixed K\"{a}hler- Lorentz anomalies in $N=1, D=4$...
Natural Supergravity Inflation (1992)
Cardoso, Gabriel Lopes, Ovrut, Burt A.
We show that a single uncharged chiral superfield, canonically coupled to \mbox{$N=1$} supergravity with vanishing superpotential, naturally drives inflation in the early universe for a class of...
Cardoso, Gabriel Lopes, Ovrut, Burt A.
We discuss the complete set of one-loop triangle graphs involving the Yang-Mills gauge connection, the \Kahler\ connection and the $\sigma$-model coordinate connection in the effective field theory...