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Open AccessQCD worldsheet axion from the bootstrap
The worldsheet axion plays a crucial role in the dynamics of the Yang-Mills confining flux tubes. According to the lattice measurements, its mass is of order the string tension and its coupling is close to a c...
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Article
Open AccessAnalyticity and unitarity for cosmological correlators
We study the fundamentals of quantum field theory on a rigid de Sitter space. We show that the perturbative expansion of late-time correlation functions to all orders can be equivalently generated by a non-uni...
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Article
Open AccessBra-ket wormholes in gravitationally prepared states
We consider two dimensional CFT states that are produced by a gravitational path integral.
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Article
Open AccessTwo-dimensional O(n) models and logarithmic CFTs
We study O(n)-symmetric two-dimensional conformal field theories (CFTs) for a continuous range of n below two. These CFTs describe the fixed point behavior of self-avoiding loops. There is a pair of known fixed p...
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Article
Open AccessdS/dS and \( T\overline{T} \)
The T T ¯ ...
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Article
Open AccessWalking, weak first-order transitions, and complex CFTs
We discuss walking behavior in gauge theories and weak first-order phase transitions in statistical physics. Despite appearing in very different systems (QCD below the conformal window, the Potts model, deconf...
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Open Access\( T\overline{T} \) partition function from topological gravity
The T T ¯ ...
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Open AccessAsymptotic fragility, near AdS2 holography and \( T\overline{T} \)
We present the exact solution for the scattering problem in the flat space Jackiw-Teitelboim (JT) gravity coupled to an arbitrary quantum field theory. JT gravity results in a gravitational dressing of field t...
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Article
Open AccessAn effective formalism for testing extensions to General Relativity with gravitational waves
The recent direct observation of gravitational waves (GW) from merging black holes opens up the possibility of exploring the theory of gravity in the strong regime at an unprecedented level. It is therefore in...
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Article
Open AccessA small weak scale from a small cosmological constant
We propose a framework in which Weinberg’s anthropic explanation of the cosmological constant problem also solves the hierarchy problem. The weak scale is selected by chiral dynamics that controls the stabiliz...
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Article
Open AccessThe Supersymmetric Effective Field Theory of Inflation
We construct the Supersymmetric Effective Field Theory of Inflation, that is the most general theory of inflationary fluctuations when time-translations and supersymmetry are spontaneously broken. The non-line...
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Book
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Chapter
Effective Field Theory for Relativistic Strings
In this section, along the lines of [12], we review the coset construction for long relativistic strings that naturally leads to the static gauge description. We also relate it to the Polchinski–Stominger desc...
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Chapter
Introduction
String theory appeared in the late 1960s in the course of study of the hadron and meson scattering amplitudes [1]. Indeed, strings naturally explain the presence of infinite number of resonances and give the corr...
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Chapter
Simplest Quantum Gravity
This chapter is devoted to the study of the integrable GGRT theory. In Sect. 4.1 we give an exact solution of TBA equations while in the rest of the chapter we study a variety of unusual properties of the exact S
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Chapter
Flux Tube Spectrum from Thermodynamic Bethe Ansatz
In this chapter we develop a technique for calculation of the QCD flux tube spectrum based on approximate integrability of the worldsheet theory at low energies. Our calculations are in good agreement with the...
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Chapter
Worldsheet S-Matrix
To address the puzzles outlined in the previous chapter we find it very instructive to analyze in details the on-shell amplitudes of particles propagating on the string worldsheet. First, in Sects. 3.1 and 3.2...
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Chapter
Natural Tuning
In this chapter we show that any two-dimensional theory can be modified in a way that its UV asymptotics become those of the GGRT theory. The modification is done directly at the level of the S-matrix and leads t...
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Article
Open AccessTowards a theory of the QCD string
We construct a new model of four-dimensional relativistic strings with integrable dynamics on the worldsheet. In addition to translational modes this model contains a single massless pseudoscalar worldsheet field...
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Article
Open AccessLooking for integrability on the worldsheet of confining strings
We study restrictions on scattering amplitudes on the worldvolume of branes and strings (such as confining flux tubes in QCD) implied by the target space Poincaré symmetry. We focus on exploring the conditions...
