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  1. Article

    Open Access

    Thermal one-point functions: CFT’s with fermions, large d and large spin

    We apply the OPE inversion formula on thermal two-point functions of fermions to obtain thermal one-point function of fermion bi-linears appearing in the corresponding OPE. We primarily focus on the OPE channe...

    Justin R. David, Srijan Kumar in Journal of High Energy Physics (2023)

  2. Article

    Open Access

    Discontinuities of free theories on AdS2

    The partition functions of free bosons as well as fermions on AdS2 are not smooth as a function of their masses. For free bosons, the partition function on AdS2 is not smooth when the mass saturates the Breitenlo...

    Justin R. David, Edi Gava, Rajesh Kumar Gupta in Journal of High Energy Physics (2023)

  3. Article

    Open Access

    Entanglement entropy of local gravitational quenches

    We study the time dependence of Rényi/entanglement entropies of locally excited states created by fields with integer spins s ≤ 2 in 4 dimensions. For spins 0, 1 these states are characterised by localised energy...

    Justin R. David, Jyotirmoy Mukherjee in Journal of High Energy Physics (2023)

  4. Article

    Open Access

    Thermal one point functions, large d and interior geometry of black holes

    We study thermal one point functions of massive scalars in AdSd+1 black holes. These are induced by coupling the scalar to either the Weyl tensor squared or the Gauss-Bonnet term. Grinberg and Maldacena argued th...

    Justin R. David, Srijan Kumar in Journal of High Energy Physics (2023)

  5. Article

    Open Access

    Entanglement entropy of gravitational edge modes

    We consider the linearised graviton in 4d Minkowski space and decompose it into tensor spherical harmonics and fix the gauge. The Gauss law of gravity implies that certain radial components of the Riemann tensor ...

    Justin R. David, Jyotirmoy Mukherjee in Journal of High Energy Physics (2022)

  6. Article

    Open Access

    Entanglement in descendants

    We study the single interval entanglement and relative entropies of conformal descendants in 2d CFT. Descendants contain non-trivial entanglement, though the entanglement entropy of the canonical primary in th...

    Barsha G. Chowdhury, Justin R. David in Journal of High Energy Physics (2022)

  7. Article

    Open Access

    Partition functions of p-forms from Harish-Chandra characters

    We show that the determinant of the co-exact p-form on spheres and anti-de Sitter spaces can be written as an integral transform of bulk and edge Harish-Chandra characters. The edge character of a co-exact p-form...

    Justin R. David, Jyotirmoy Mukherjee in Journal of High Energy Physics (2021)

  8. Article

    Open Access

    Horizon states and the sign of their index in \( \mathcal{N} \) = 4 dyons

    Classical single centered solutions of 1/4 BPS dyons in N \( \mathcal{N} \)

    Aradhita Chattopadhyaya, Justin R. David in Journal of High Energy Physics (2021)

  9. Article

    Open Access

    Hyperbolic cylinders and entanglement entropy: gravitons, higher spins, p-forms

    We show that the entanglement entropy of D = 4 linearized gravitons across a sphere recently computed by Benedetti and Casini coincides with that obtained using the Kaluza-Klein tower of traceless transverse mass...

    Justin R. David, Jyotirmoy Mukherjee in Journal of High Energy Physics (2021)

  10. Article

    Open Access

    Rényi divergences from Euclidean quenches

    We study the generalisation of relative entropy, the Rényi divergence Dα(ρρβ) in 2d CFTs between an excited state density matrix ρ, created by deforming the Hamiltonian, and the thermal density matrix ρβ. Using ...

    Barsha G. Chowdhury, Shouvik Datta, Justin R. David in Journal of High Energy Physics (2020)

  11. Article

    Open Access

    Boundary conditions and localization on AdS. Part II. General analysis

    We develop the method of Green’s function to evaluate the one loop determinants that arise in localization of supersymmetric field theories on AdS spaces. The theories we study have at least

    Justin R. David, Edi Gava, Rajesh Kumar Gupta in Journal of High Energy Physics (2020)

  12. Article

    Open Access

    Chaos bound in Bershadsky-Polyakov theory

    We consider two dimensional conformal field theory (CFT) with large central charge c in an excited state obtained by the insertion of an operator Φ with large dimension ΔΦ ∼ O(c) at spatial infinities in the ther...

    Justin R. David, Timothy J. Hollowood, Surbhi Khetrapal in Journal of High Energy Physics (2019)

  13. Article

    Open Access

    Properties of dyons in \( \mathcal{N} \) = 4 theories at small charges

    We study three properties of 1/4 BPS dyons at small charges in string compactifications which preserve ...

    Aradhita Chattopadhyaya, Justin R. David in Journal of High Energy Physics (2019)

  14. Article

    Open Access

    Bootstrap and collider physics of parity violating conformal field theories in d = 3

    We study the crossing equations in d = 3 for the four point function of two U(1) currents and two scalars including the presence of a parity violating term for the s-channel stress tensor exchange. We show the ex...

    Subham Dutta Chowdhury, Justin R. David, Shiroman Prakash in Journal of High Energy Physics (2019)

  15. Article

    Open Access

    Boundary conditions and localization on AdS. Part I

    We study the role of boundary conditions on the one loop partition function the N = ...

    Justin R. David, Edi Gava, Rajesh Kumar Gupta in Journal of High Energy Physics (2018)

  16. Article

    Open Access

    Gravitational couplings in \( \mathcal{N}=2 \) string compactifications and Mathieu Moonshine

    We evaluate the low energy gravitational couplings, Fg in the heterotic E8 ×E8 string theory compactified on orbifolds of K3 × T 2 by g which acts as a ℤN automorphism on K3 together with a 1/N shift along T 2. ...

    Aradhita Chattopadhyaya, Justin R. David in Journal of High Energy Physics (2018)

  17. Article

    Open Access

    Constraints on parity violating conformal field theories in d = 3

    We derive constraints on three-point functions involving the stress tensor, T, and a conserved U(1) current, j, in 2+1 dimensional conformal field theories that violate parity, using conformal collider bounds int...

    Subham Dutta Chowdhury, Justin R. David, Shiroman Prakash in Journal of High Energy Physics (2017)

  18. Article

    Open Access

    Local quenches and quantum chaos from higher spin perturbations

    We study local quenches in 1+1 dimensional conformal field theories at large-c by operators carrying higher spin charge. Viewing such states as solutions in Chern-Simons theory, representing infalling massive par...

    Justin R. David, Surbhi Khetrapal, S. Prem Kumar in Journal of High Energy Physics (2017)

  19. Article

    Open Access

    Spectral sum rules for conformal field theories in arbitrary dimensions

    We derive spectral sum rules in the shear channel for conformal field theories at finite temperature in general d ≥ 3 dimensions. The sum rules result from the OPE of the stress tensor at high frequency as well a...

    Subham Dutta Chowdhury, Justin R. David, Shiroman Prakash in Journal of High Energy Physics (2017)

  20. Article

    Open Access

    Localization on AdS2 × S1

    Conformal symmetry relates the metric on AdS 2 × S 1 to that of S 3. This implies that under a suitable choice of bo...

    Justin R. David, Edi Gava, Rajesh Kumar Gupta in Journal of High Energy Physics (2017)

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