16 Result(s)
within
Victor Gorbenko
Quantum Physics
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Article
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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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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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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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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Open AccessdS/dS and \( T\overline{T} \)
The T T ¯ ...
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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
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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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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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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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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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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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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...
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Natural tuning: towards a proof of concept
The cosmological constant problem and the absence of new natural physics at the electroweak scale, if confirmed by the LHC, may either indicate that the nature is fine-tuned or that a refined notion of natural...
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Solving the simplest theory of quantum gravity
We solve what is quite likely the simplest model of quantum gravity, the worldsheet theory of an infinitely long, free bosonic string in Minkowski space. Contrary to naive expectations, this theory is non-triv...
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Effective string theory revisited
We revisit the effective field theory of long relativistic strings such as confining flux tubes in QCD. We derive the Polchinski-Strominger interaction by a calculation in static gauge. This interaction implie...
