Kachru, Shamit 1970
Overview
Works:  25 works in 29 publications in 1 language and 916 library holdings 

Genres:  Conference proceedings 
Roles:  Thesis advisor, Author 
Classifications:  QC794.6.S85, 530.14 
Publication Timeline
.
Most widely held works by
Shamit Kachru
Strings, branes, and gravity : TASI 99 : Boulder, Colorado, USA, 31 May25 June 1999 by Theoretical Advanced Study Institute in Elementary Particle Physics(
Book
)
4 editions published in 2001 in English and held by 55 WorldCat member libraries worldwide
Many of the topics in this book are outgrowths of the spectacular new understanding of duality in string theory which emerged around 1995. They include the AdS/CFT correspondence and its relation to holography, the matrix theory formulation of M theory, the structure of black holes in string theory, the structure of Dbranes and Mbranes, and detailed development of dualities with N = 1 and N = 2 supersymmetry. In addition, there are lectures covering experimental and phenomenological aspects of the Standard Model and its extensions, and discussions on cosmology including both theoretical aspects and the exciting new experimental evidence for a nonzero cosmological constant
4 editions published in 2001 in English and held by 55 WorldCat member libraries worldwide
Many of the topics in this book are outgrowths of the spectacular new understanding of duality in string theory which emerged around 1995. They include the AdS/CFT correspondence and its relation to holography, the matrix theory formulation of M theory, the structure of black holes in string theory, the structure of Dbranes and Mbranes, and detailed development of dualities with N = 1 and N = 2 supersymmetry. In addition, there are lectures covering experimental and phenomenological aspects of the Standard Model and its extensions, and discussions on cosmology including both theoretical aspects and the exciting new experimental evidence for a nonzero cosmological constant
Strings, branes, and gravity : TASI 99, Boulder, Colorado, 31 May  25 June 1999. Eds.: Jeffrey Harvey ; Shamit Kachru ; Eva
Silverstein(
Book
)
1 edition published in 2001 in English and held by 2 WorldCat member libraries worldwide
1 edition published in 2001 in English and held by 2 WorldCat member libraries worldwide
DBrane Instantons in Type II Orientifolds(
)
1 edition published in 2009 in English and held by 2 WorldCat member libraries worldwide
We review recent progress in determining the effects Of Dbrane instantons in N = 1 supersymmetric compactifications of Type II string theory to four dimensions. We describe the abstract Dbrane instanton calculus for holomorphic couplings such as the superpotential, the gauge kinetic function, and higher fermionic Fterms, and we briefly discuss the implications of background fluxes for the instanton sector. We then summarize die concrete consequences of stringy Dbrane instantons for the construction of semirealistic models of particle physics or supersymmetry breaking in compact and noncompact geometries
1 edition published in 2009 in English and held by 2 WorldCat member libraries worldwide
We review recent progress in determining the effects Of Dbrane instantons in N = 1 supersymmetric compactifications of Type II string theory to four dimensions. We describe the abstract Dbrane instanton calculus for holomorphic couplings such as the superpotential, the gauge kinetic function, and higher fermionic Fterms, and we briefly discuss the implications of background fluxes for the instanton sector. We then summarize die concrete consequences of stringy Dbrane instantons for the construction of semirealistic models of particle physics or supersymmetry breaking in compact and noncompact geometries
Taxonomy of flux vacua by Alexander Giryavets(
Book
)
1 edition published in 2007 in English and held by 2 WorldCat member libraries worldwide
1 edition published in 2007 in English and held by 2 WorldCat member libraries worldwide
Topics in quantum information and string theory by
Ning Bao(
)
1 edition published in 2014 in English and held by 1 WorldCat member library worldwide
There are many aspects of the Ads/CFT correspondence that end up having rather direct applications to condensed matter physics. While some of these applications are rather straightforward and expected from parallel results in the condensed matter literature, some of the results are rather interesting and new, and sometimes derive from entirely unexpected aspects of the gravitational theory proposed to be dual to the condensed matter eld theory. In this thesis, I will explore several such examples that I have had the honor to study. This thesis is based on the papers [75], [2], [3] and [4] written with Xi Dong, Sarah Harrison, Shamit Kachru, Eva Silverstein, Subir Sachdev, and Gonzalo Torroba, or some subset thereof. It should not be cited without also referencing those papers
1 edition published in 2014 in English and held by 1 WorldCat member library worldwide
There are many aspects of the Ads/CFT correspondence that end up having rather direct applications to condensed matter physics. While some of these applications are rather straightforward and expected from parallel results in the condensed matter literature, some of the results are rather interesting and new, and sometimes derive from entirely unexpected aspects of the gravitational theory proposed to be dual to the condensed matter eld theory. In this thesis, I will explore several such examples that I have had the honor to study. This thesis is based on the papers [75], [2], [3] and [4] written with Xi Dong, Sarah Harrison, Shamit Kachru, Eva Silverstein, Subir Sachdev, and Gonzalo Torroba, or some subset thereof. It should not be cited without also referencing those papers
The large hadron collider and models of new physics by Anson Zhao Yu Hook(
)
1 edition published in 2012 in English and held by 1 WorldCat member library worldwide
The Large Hadron Collider (LHC) is pushing the boundaries of the Standard Model of particle physics. Quantum corrections push the mass of the Higgs to be very heavy; If the hints of the Higgs boson now seen at the LHC are in fact the Higgs, the lightness of the Higgs boson must be explained. Supersymmetry provides a natural explanation for the Higgs mass. This thesis discusses two aspects in Supersymmetric theories, how to build them and how to see them
1 edition published in 2012 in English and held by 1 WorldCat member library worldwide
The Large Hadron Collider (LHC) is pushing the boundaries of the Standard Model of particle physics. Quantum corrections push the mass of the Higgs to be very heavy; If the hints of the Higgs boson now seen at the LHC are in fact the Higgs, the lightness of the Higgs boson must be explained. Supersymmetry provides a natural explanation for the Higgs mass. This thesis discusses two aspects in Supersymmetric theories, how to build them and how to see them
String theory, geometry and (mock) modular forms by Sarah Harrison(
)
1 edition published in 2014 in English and held by 1 WorldCat member library worldwide
Monstrous moonshine (Conway and Norton, c. 1980) is a relation between the "monster", the largest of the sporadic finite simple groups, and the jfunction, the unique holomorphic weight zero modular function under SL(2, Z) with a simple pole at the infinite cusp. Recently, string theory has been the impetus for the discovery of a host of similar such relations, connecting many smaller finite groups to mock modular forms, the recalcitrant cousins of the jfunction. Here I discuss some of these mysterious new connections, and progress we have made in understanding them by studying string theory on K3 manifolds. This thesis is based on the papers [157], [153], and [127] written with Miranda Cheng, Xi Dong, John Duncan, Shamit Kachru, Natalie Paquette, and Timm Wrase. It should not be cited without also referencing those papers
1 edition published in 2014 in English and held by 1 WorldCat member library worldwide
Monstrous moonshine (Conway and Norton, c. 1980) is a relation between the "monster", the largest of the sporadic finite simple groups, and the jfunction, the unique holomorphic weight zero modular function under SL(2, Z) with a simple pole at the infinite cusp. Recently, string theory has been the impetus for the discovery of a host of similar such relations, connecting many smaller finite groups to mock modular forms, the recalcitrant cousins of the jfunction. Here I discuss some of these mysterious new connections, and progress we have made in understanding them by studying string theory on K3 manifolds. This thesis is based on the papers [157], [153], and [127] written with Miranda Cheng, Xi Dong, John Duncan, Shamit Kachru, Natalie Paquette, and Timm Wrase. It should not be cited without also referencing those papers
Towards a string theory model of de Sitter space and early universe cosmology by Jonathan David Maltz(
)
1 edition published in 2013 in English and held by 1 WorldCat member library worldwide
String theory is arguably the best candidate for a theory of quantum gravity and unified interactions. Reconciling Einstein's theory of General Relativity with Quantum Mechanics. The theory however is best understood on Minkowski and Antide Sitter spacetimes, and not on exponentially expanding spacetimes with positive cosmological constant, like our own universe. There is still no satisfactory formulation of String Theory on these so called asymptotically de Sitter space times. In this thesis I will discuss certain avenues of progress towards a String Theory formulation of de Sitter spacetimes. Specifically, how understanding of the analytic continuations of Liouville Theory and how to gaugefix it in the Timelike regime will aid in the understanding of the proposed FRWCFT duality of de Sitter space. It is also discussed how nontrivial topology effects proposed ChernSimons Matter duals of Vasiliev Higher Spin gravity theories which are important in the dSCFT description of de Sitter Space
1 edition published in 2013 in English and held by 1 WorldCat member library worldwide
String theory is arguably the best candidate for a theory of quantum gravity and unified interactions. Reconciling Einstein's theory of General Relativity with Quantum Mechanics. The theory however is best understood on Minkowski and Antide Sitter spacetimes, and not on exponentially expanding spacetimes with positive cosmological constant, like our own universe. There is still no satisfactory formulation of String Theory on these so called asymptotically de Sitter space times. In this thesis I will discuss certain avenues of progress towards a String Theory formulation of de Sitter spacetimes. Specifically, how understanding of the analytic continuations of Liouville Theory and how to gaugefix it in the Timelike regime will aid in the understanding of the proposed FRWCFT duality of de Sitter space. It is also discussed how nontrivial topology effects proposed ChernSimons Matter duals of Vasiliev Higher Spin gravity theories which are important in the dSCFT description of de Sitter Space
Monte Carlo simulation of particle production and decay at highenergy colliders by Michael Edmund Davenport(
)
1 edition published in 2010 in English and held by 1 WorldCat member library worldwide
Detecting and understanding new physics at the LHC and other future colliders depends on having an understanding of what kinds of signals to look for above the Standard Model background. Event generators are used to simulate the physics events we can expect to see at these colliders and facilitate the search for and analysis of interesting signals. In this thesis we discuss the pandora event generator and its use for generating collider events with Beyond the Standard Model particles and their decays. First we will describe the physics fundamental to event generators, the particular philosophy behind the pandora generator, and how it compares to other available tools. Second, we will discuss how that particular philosophy was implemented and how the implementation facilitates incorporating new BSM physics. Finally we will discuss several physics results generated using pandora, displaying its various features
1 edition published in 2010 in English and held by 1 WorldCat member library worldwide
Detecting and understanding new physics at the LHC and other future colliders depends on having an understanding of what kinds of signals to look for above the Standard Model background. Event generators are used to simulate the physics events we can expect to see at these colliders and facilitate the search for and analysis of interesting signals. In this thesis we discuss the pandora event generator and its use for generating collider events with Beyond the Standard Model particles and their decays. First we will describe the physics fundamental to event generators, the particular philosophy behind the pandora generator, and how it compares to other available tools. Second, we will discuss how that particular philosophy was implemented and how the implementation facilitates incorporating new BSM physics. Finally we will discuss several physics results generated using pandora, displaying its various features
A simple harmonic universe by
Shamit Kachru(
Visual
)
1 edition published in 2011 in English and held by 1 WorldCat member library worldwide
Prof Kachru discusses some very simple but peculiar solutions of general relativity which, in the classical limit, closely approximate cyclic Universes admitting an infinite sequence of bounces, without requiring exotic stressenergy sources. This occurs in a perfect fluid approximation for the sources supporting the cosmology; he argues that any more realistic modeling of the sources, or even proper accounting of quantum particle production (e.g. of gravitons), indicates that within a finite time, sufficient entropy would accumulate to violate the covariant entropy bound. This indicates that after a finite number of cycles, such Universes are no longer reliably captured by general relativity, and likely crunch. He speculates about whether such cosmologies could be of use in real cosmological modelbuilding
1 edition published in 2011 in English and held by 1 WorldCat member library worldwide
Prof Kachru discusses some very simple but peculiar solutions of general relativity which, in the classical limit, closely approximate cyclic Universes admitting an infinite sequence of bounces, without requiring exotic stressenergy sources. This occurs in a perfect fluid approximation for the sources supporting the cosmology; he argues that any more realistic modeling of the sources, or even proper accounting of quantum particle production (e.g. of gravitons), indicates that within a finite time, sufficient entropy would accumulate to violate the covariant entropy bound. This indicates that after a finite number of cycles, such Universes are no longer reliably captured by general relativity, and likely crunch. He speculates about whether such cosmologies could be of use in real cosmological modelbuilding
Holography beyond AdS/CFT quantum cosmology and black holes by Edgar Shaghoulian(
)
1 edition published in 2014 in English and held by 1 WorldCat member library worldwide
Inspired by the successes of AdS/CFT, this dissertation is devoted to the study of holography in nonAdS spacetimes resembling patches of our universe. We will consider the universe on large scales and near spinning black holes. In the case of black holes, we will show that holographic entanglement entropy techniques from AdS/CFT prove quantitatively successful when adapted to the spacetime near spinning black holes. In the context of threedimensional de Sitter spacetime, we will propose a microscopic derivation of the cosmological horizon entropy. For fourdimensional de Sitter spacetime, we shall compute wavefunctionals within a proposed higherspin holographic duality, in addition to proposing a oneparameter extension to the duality. We will end by analyzing the sharply ultrametric state space of a massless scalar in an FRW background and will propose a holographic duality which relates FRW cosmologies to hyperscalingviolating field theories
1 edition published in 2014 in English and held by 1 WorldCat member library worldwide
Inspired by the successes of AdS/CFT, this dissertation is devoted to the study of holography in nonAdS spacetimes resembling patches of our universe. We will consider the universe on large scales and near spinning black holes. In the case of black holes, we will show that holographic entanglement entropy techniques from AdS/CFT prove quantitatively successful when adapted to the spacetime near spinning black holes. In the context of threedimensional de Sitter spacetime, we will propose a microscopic derivation of the cosmological horizon entropy. For fourdimensional de Sitter spacetime, we shall compute wavefunctionals within a proposed higherspin holographic duality, in addition to proposing a oneparameter extension to the duality. We will end by analyzing the sharply ultrametric state space of a massless scalar in an FRW background and will propose a holographic duality which relates FRW cosmologies to hyperscalingviolating field theories
(0,2) superstring vacua by
Shamit Kachru(
)
1 edition published in 1994 in English and held by 1 WorldCat member library worldwide
1 edition published in 1994 in English and held by 1 WorldCat member library worldwide
Holographic models constraints and constructions by Sho Yaida(
)
1 edition published in 2011 in English and held by 1 WorldCat member library worldwide
Holographic correspondences provide models of strongly correlated systems whose thermodynamic and transport properties are computationally tractable. In this thesis we first provide a class of seemingly innocuous bottomup holographic models which are argued to be inconsistent, violating microcausality. With such cautionary cases in mind, we go on to construct a variety of consistent topdown holographic models. In particular, we engineer holographic lattices, dimers, and dimerglasses, using ingredients in type IIB string theory. Finally, we set up disordered holographic systems and develop technology which enables us to study renormalization group flows and thermodynamic properties in these strongly correlated systems with randomness
1 edition published in 2011 in English and held by 1 WorldCat member library worldwide
Holographic correspondences provide models of strongly correlated systems whose thermodynamic and transport properties are computationally tractable. In this thesis we first provide a class of seemingly innocuous bottomup holographic models which are argued to be inconsistent, violating microcausality. With such cautionary cases in mind, we go on to construct a variety of consistent topdown holographic models. In particular, we engineer holographic lattices, dimers, and dimerglasses, using ingredients in type IIB string theory. Finally, we set up disordered holographic systems and develop technology which enables us to study renormalization group flows and thermodynamic properties in these strongly correlated systems with randomness
String theory and cosmology by
Shamit Kachru(
Visual
)
1 edition published in 2005 in English and held by 1 WorldCat member library worldwide
Shamit Kachru, Associate Professor of Physics, Stanford talks about string theory, which provides our most promising candidate for a unified theory of the fundamental interactions. In this talk, he describes our current understanding of how realistic particle physics and cosmology may emerge in this framework, and discusses some possible observable signatures of string theory models of early universe cosmology
1 edition published in 2005 in English and held by 1 WorldCat member library worldwide
Shamit Kachru, Associate Professor of Physics, Stanford talks about string theory, which provides our most promising candidate for a unified theory of the fundamental interactions. In this talk, he describes our current understanding of how realistic particle physics and cosmology may emerge in this framework, and discusses some possible observable signatures of string theory models of early universe cosmology
New supersymmetric string compactifications by
Shamit Kachru(
)
1 edition published in 2003 in Undetermined and held by 1 WorldCat member library worldwide
We describe a new class of supersymmetric string compactifications to 4d Minkowski space. These solutions involve type II strings propagating on (orientifolds of) non CalabiYau spaces in the presence of background NS and RR fluxes. The simplest examples have descriptions as cosets, generalizing the threedimensional nilmanifold. They can also be thought of as twisted tori. We derive a formula for the (super) potential governing the light fields, which is generated by the fluxes and certain "twists" in the geometry. Detailed consideration of an example also gives strong evidence that in some cases, these exotic geometries are related by smooth transitions to standard CalabiYau or G(2) compactifications of Mtheory
1 edition published in 2003 in Undetermined and held by 1 WorldCat member library worldwide
We describe a new class of supersymmetric string compactifications to 4d Minkowski space. These solutions involve type II strings propagating on (orientifolds of) non CalabiYau spaces in the presence of background NS and RR fluxes. The simplest examples have descriptions as cosets, generalizing the threedimensional nilmanifold. They can also be thought of as twisted tori. We derive a formula for the (super) potential governing the light fields, which is generated by the fluxes and certain "twists" in the geometry. Detailed consideration of an example also gives strong evidence that in some cases, these exotic geometries are related by smooth transitions to standard CalabiYau or G(2) compactifications of Mtheory
Complex/Symplectic Mirrors(
)
1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide
We construct a class of symplectic nonKaehler and complex nonKaehler string theory vacua, extending and providing evidence for an earlier suggestion by Polchinski and Strominger. The class admits a mirror pairing by construction. Comparing hints from a variety of sources, including tendimensional supergravity and KK reduction on SU(3)structure manifolds, suggests a picture in which string theory extends Reid's fantasy to connect classes of both complex nonKaehler and symplectic nonKaehler manifolds
1 edition published in 2005 in English and held by 0 WorldCat member libraries worldwide
We construct a class of symplectic nonKaehler and complex nonKaehler string theory vacua, extending and providing evidence for an earlier suggestion by Polchinski and Strominger. The class admits a mirror pairing by construction. Comparing hints from a variety of sources, including tendimensional supergravity and KK reduction on SU(3)structure manifolds, suggests a picture in which string theory extends Reid's fantasy to connect classes of both complex nonKaehler and symplectic nonKaehler manifolds
Strings, Branes and Gravity (Tasi 1999) Colorado, USA 31 May25 June 1999 by
Jeffrey Harvey(
)
2 editions published in 2001 in English and held by 0 WorldCat member libraries worldwide
Foreword; CONTENTS; TASI Lectures on Branes Black Holes and AntiDe Sitter Space; 1 INTRODUCTION; 1.1 Supergravity supermembranes and Mtheory; 1.2 The KaluzaKlein idea; 1.3 The field content; 1.4 AdS/CFT correspondence; 1.5 Plan of the lectures; 1.6 Problems 1; 2 ELEVEN DIMENSIONAL SUPERGRAVITY; 2.1 Bosonic field equations; 2.2 AdS4 x S7; 2.3 Consistent truncation to the massless modes; 2.4 The supermembrane solution; 2.5 AdS7 x S4; 2.6 The superfivebrane solution; 2.7 Problems 2; 3 TYPE IIB SUPERGRAVITY; 3.1 Bosonic field equations; 3.2 AdS5 x S5; 3.3 The selfdual superthreebrane solution
2 editions published in 2001 in English and held by 0 WorldCat member libraries worldwide
Foreword; CONTENTS; TASI Lectures on Branes Black Holes and AntiDe Sitter Space; 1 INTRODUCTION; 1.1 Supergravity supermembranes and Mtheory; 1.2 The KaluzaKlein idea; 1.3 The field content; 1.4 AdS/CFT correspondence; 1.5 Plan of the lectures; 1.6 Problems 1; 2 ELEVEN DIMENSIONAL SUPERGRAVITY; 2.1 Bosonic field equations; 2.2 AdS4 x S7; 2.3 Consistent truncation to the massless modes; 2.4 The supermembrane solution; 2.5 AdS7 x S4; 2.6 The superfivebrane solution; 2.7 Problems 2; 3 TYPE IIB SUPERGRAVITY; 3.1 Bosonic field equations; 3.2 AdS5 x S5; 3.3 The selfdual superthreebrane solution
Bounds on Masses of Bulk Fields in String Compactifications(
)
1 edition published in 2006 in English and held by 0 WorldCat member libraries worldwide
In string compactification on a manifold X, in addition to the string scale and the normal scales of lowenergy particle physics, there is a KaluzaKlein scale 1/R associated with the size of X. We present an argument that generic string models with lowenergy supersymmetry have, after moduli stabilization, bulk fields with masses which are parametrically lighter than 1/R. We discuss the implications of these light states for anomaly mediation and gaugino mediation scenarios
1 edition published in 2006 in English and held by 0 WorldCat member libraries worldwide
In string compactification on a manifold X, in addition to the string scale and the normal scales of lowenergy particle physics, there is a KaluzaKlein scale 1/R associated with the size of X. We present an argument that generic string models with lowenergy supersymmetry have, after moduli stabilization, bulk fields with masses which are parametrically lighter than 1/R. We discuss the implications of these light states for anomaly mediation and gaugino mediation scenarios
Observational Signatures and NonGaussianities ofGeneral Single Field Inflation(
)
1 edition published in 2006 in English and held by 0 WorldCat member libraries worldwide
We perform a general study of primordial scalar nonGaussianities in single field inflationary models. We consider models where the inflaton Lagrangian is an arbitrary function of the scalar field and its first derivative, and the sound speed is arbitrary. We find that under reasonable assumptions, the nonGaussianity is completely determined by 5 parameters. In special limits of the parameter space, one finds distinctive ''shapes'' of the nonGaussianity. In models with a small sound speed, several of these shapes would become potentially observable in the near future. Different limits of our formulae recover various previously known results
1 edition published in 2006 in English and held by 0 WorldCat member libraries worldwide
We perform a general study of primordial scalar nonGaussianities in single field inflationary models. We consider models where the inflaton Lagrangian is an arbitrary function of the scalar field and its first derivative, and the sound speed is arbitrary. We find that under reasonable assumptions, the nonGaussianity is completely determined by 5 parameters. In special limits of the parameter space, one finds distinctive ''shapes'' of the nonGaussianity. In models with a small sound speed, several of these shapes would become potentially observable in the near future. Different limits of our formulae recover various previously known results
STRINGS by
Shamit Kachru(
)
1 edition published in 2001 in English and held by 0 WorldCat member libraries worldwide
1 edition published in 2001 in English and held by 0 WorldCat member libraries worldwide
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Related Identities
 Harvey, Jeffrey Author
 Silverstein, Eva 1970 Thesis advisor
 United States Department of Energy Office of Scientific and Technical Information Distributor
 United States Department of Energy Sponsor
 Stanford Linear Accelerator Center Researcher
 Stanford University Department of Physics
 Silverstein, Eva
 Chen, Xingang
 Tomasiello, Alessandro
 Svrcek, Peter
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Alternative Names
Shamit Kachru amerikansk fysikar
Shamit Kachru amerikansk fysiker
Shamit Kachru physicien amricain
Shamit Kachru USamerikanischer Physiker
شمت کاچرو فیزیکدان آمریکایی
शमित काचरू
샤미트 카치루
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