hep-th

Wall-crossing of Instantons on the Blow-up

This paper investigates instanton counting in four-dimensional $\mathcal{N}=2$ supersymmetric gauge theories on the blow-up of $\mathbb{C}^2$ by modeling the moduli space as a quiver variety with stability parameters, characterizing contributions via super-partitions to analyze wall-crossing phenomena and explicitly reproduce the Nakajima-Yoshioka blow-up formula.

Gravity mediated entanglement of phonons in Bose-Einstein condensates

This paper proposes a Quantum Gravity Induced Entanglement of Phonons (QGEP) protocol using two Bose-Einstein condensates, demonstrating that gravity-mediated entanglement between their phonon modes can be significantly stronger and more robust than the standard QGEM protocol for massive particles, particularly at low separation distances and with increased particle numbers.

Primordial Magnetogenesis and Gravitational Waves from ALP-assisted Phase Transition

This paper proposes that a first-order phase transition within a minimal axion-like particle framework, coupled to the Standard Model via a Higgs portal, can simultaneously generate the primordial magnetic fields required to explain recent blazar observations and a stochastic gravitational wave background detectable by future space-based interferometers like LISA, thereby establishing a multi-messenger link between cosmological signatures and laboratory ALP searches.

Beyond Hagedorn: A Harmonic Approach to $T\bar{T}$-deformation

This paper employs harmonic analysis to express $T\bar{T}$-deformed CFT partition functions in terms of Maass waveforms, enabling efficient numerical computation and proposing a natural analytic continuation that extends the partition function beyond the Hagedorn singularity for any deformation parameter.

Non-Perturbative Real Topological Strings

This paper investigates the resurgent structure of Walcher's real topological string on general Calabi-Yau manifolds by deriving trans-series solutions and explicit multi-instanton amplitudes, revealing that integer disk-counting invariants manifest as Stokes constants, with results experimentally verified for local $\mathbb{P}^2$.

Cosmological higher-curvature gravities

This paper introduces and systematically explores "Cosmological Gravities," a class of higher-curvature theories in dimensions $D \geq 3$ where Friedmann-Lemaître-Robertson-Walker configurations and scalar cosmological perturbations obey equations of motion that are at most second-order in derivatives, while also deriving explicit instances of these theories and their non-hairy Schwarzschild generalizations.

Exploring Particle Production and Thermal-Like Behavior through Quantum Entanglement

Observable CMB B-modes from Cosmological Phase Transitions

This paper demonstrates that tensor perturbations generated during first-order cosmological phase transitions in a secluded dark sector can produce observable CMB B-mode signals comparable to inflationary predictions, potentially complicating the interpretation of future data but offering a way to distinguish the two scenarios through multi-scale measurements.

Octonions, complex structures and Standard Model fermions

This paper explains how the Standard Model gauge group arises as a subgroup of Spin(10) through two commuting complex structures encoded by a pair of orthogonal pure spinors, utilizing the octonionic model to provide an efficient description of these fermionic representations.

Trans-series from condensates in the non-linear sigma model

This paper establishes a manifestly $O(N)$ symmetric, massless perturbative framework for the two-dimensional non-linear sigma model derived from the quartic linear sigma model, demonstrating its ability to reproduce exact non-perturbative results at next-to-leading order in the $1/N$ expansion and clarifying how UV renormalon ambiguities in the perturbative series are cancelled by operator condensates.