303 citations · 1.5k across the 32 of their papers we have counts for
23 papers · 1 filter
A Consistency Relation for Single-Field Inflation with Power Spectrum Oscillations
Mark G. Jackson, Gary Shiu
We derive a theoretical upper bound on the oscillation frequency in the scalar perturbation power spectrum of single-field inflation. Oscillations are most naturally produced by mo…
Angular Correlation Functions for Models with Logarithmic Oscillations
Mark G. Jackson, Ben Wandelt, François Bouchet
There exist several theoretical motivations for primordial correlation functions (such as the power spectrum) to contain oscillations as a logarithmic function of comoving momentum…
Integrating out Heavy Fields in Inflation
Mark G. Jackson
I present the procedure for integrating out quantum fields whose mass M is well above the Hubble scale H in de Sitter space. The effective interaction and density matrix are explic…
Model-Independent Signatures of New Physics in non-Gaussianity
Mark G. Jackson, Koenraad Schalm
We compute the model-independent contributions to the primordial bispectrum and trispectrum in de Sitter space due to high-energy physics. We do this by coupling a light inflaton t…
Model-Independent Signatures of New Physics in Slow-Roll Inflation
Mark G. Jackson, Koenraad Schalm
We compute the universal generic corrections to the power spectrum in slow-roll inflation due to unknown high-energy physics. We arrive at this result via a careful integrating out…
Model Independent Signatures of New Physics in the Inflationary Power Spectrum
Mark G. Jackson, Koenraad Schalm
We compute the universal generic corrections to the inflationary power spectrum due to unknown high-energy physics. We arrive at this result via a careful integrating out of massiv…
Bispectrum signatures of a modified vacuum in single field inflation with a small speed of sound
P. Daniel Meerburg, Jan Pieter van der Schaar, Mark G. Jackson
Deviations from the Bunch-Davies vacuum during an inflationary period can leave a testable imprint on the higher-order correlations of the CMB and large scale structures in the Uni…
Gravitational Wave Bursts from Cosmic Superstring Reconnections
Mark G. Jackson, Xavier Siemens
We compute the gravitational waveform produced by cosmic superstring reconnections. This is done by first constructing the superstring reconnection trajectory, which closely resemb…
Holographic Geometry and Noise in Matrix Theory
Craig J. Hogan, Mark G. Jackson
Using Matrix Theory as a concrete example of a fundamental holographic theory, we show that the emergent macroscopic spacetime displays a new macroscopic quantum structure, hologra…
Spin-Statistics Violations in Superstring Theory
Mark G. Jackson
I describe how superstring theory may violate spin-statistics in an experimentally observable manner. Reviewing the basics of superstring interactions and how to utilize these to p…
Spin-Statistics Violations from Heterotic String Worldsheet Instantons
Mark G. Jackson
In this paper we consider the role that worldsheet instantons in the heterotic string could play in spin-statistics violations. Such violations are nonperturbative in the string te…
Interactions of Cosmic Superstrings
Mark G. Jackson
We develop methods by which cosmic superstring interactions can be studied in detail. These include the reconnection probability and emission of radiation such as gravitons or smal…
A New Spin on Quantum Gravity
Mark G. Jackson, Craig J. Hogan
We suggest that the (small but nonvanishing) cosmological constant, and the holographic properties of gravitational entropy, may both reflect unconventional quantum spin-statistics…
A Note on Cosmic (p,q,r) Strings
Mark G. Jackson
The spectrum of bound states of F- and D-strings has a distinctive square-root tension formula that is hoped to be a hallmark of fundamental cosmic strings. We point out th…
Cosmic Superstring Scattering in Backgrounds
Mark G. Jackson
We generalize the calculation of cosmic superstring reconnection probability to non-trivial backgrounds. This is done by modeling cosmic strings as wound tachyon modes in the 0B th…
Gravity from a Modified Commutator
Mark G. Jackson
We show that a suitably chosen position-momentum commutator can elegantly describe many features of gravity, including the IR/UV correspondence and dimensional reduction (`holograp…
String windings in the early universe
Richard Easther, Brian R. Greene, Mark G. Jackson +1
We study string dynamics in the early universe. Our motivation is the proposal of Brandenberger and Vafa, that string winding modes may play a key role in decompactifying three spa…
Collisions of Cosmic F- and D-strings
Mark G. Jackson, Nicholas T. Jones, Joseph Polchinski
Recent work suggests that fundamental and Dirichlet strings, and their (p,q) bound states, may be observed as cosmic strings. The evolution of cosmic string networks, and therefore…
Brane gases in the early universe: thermodynamics and cosmology
Richard Easther, Brian R. Greene, Mark G. Jackson +1
We consider the thermodynamic and cosmological properties of brane gases in the early universe. Working in the low energy limit of M-theory we assume the universe is a homogeneous…
Brane gas cosmology in M-theory: late time behavior
Richard Easther, Brian R. Greene, Mark G. Jackson +1
We investigate the late-time behavior of a universe containing a supergravity gas and wrapped 2-branes in the context of M-theory compactified on T^10. The supergravity gas tends t…
A Quantum Mechanical Model of Spherical Supermembranes
John Conley, Ben Geller, Mark G. Jackson +2
We present a quantum mechanical model of spherical supermembranes. Using superfields to represent the cartesian coordinates of the membrane, we are able to exactly determine its su…
Cosmological String Gas on Orbifolds
Richard Easther, Brian R. Greene, Mark G. Jackson
It has long been known that strings wound around incontractible cycles can play a vital role in cosmology. In particular, in a spacetime with toroidal spatial hypersurfaces, the dy…
The Stability of Noncommutative Scalar Solitons
Mark G. Jackson
We determine the stability conditions for a radially symmetric noncommutative scalar soliton at finite noncommutivity parameter . We find an intriguing relationship between the…