Department of Physics: Recent submissions

  • Fast spinning strings on η deformed AdS5 × S5 
    Banerjee, Aritra (Springer, 2018-02)
    In this paper, considering the correspondence between spin chains and string sigma models, we explore the rotating string solutions over η deformed AdS5 × S5 in the so-called fast spinning limit. In our analysis, we focus ...
  • Probing analytical and numerical integrability: the curious case of (AdS5 × S5)η 
    Banerjee, Aritra (Springer, 2018)
    Motivated by recent studies related to integrability of string motion in various backgrounds via analytical and numerical procedures, we discuss these procedures for a well known integrable string background (AdS5 × S5)η. ...
  • On multi-spin classical strings with NS-NS flux 
    Banerjee, Aritra (Springer, 2018)
    We study multi spin semiclassical strings in AdS3 × S3 × T4 background supported by a mixture of Neveu-Schwarz-Neveu-Schwarz (NS-NS) and Ramond-Ramond (R-R) fluxes. This ‘mixed flux’ background has been recently proved to ...
  • Exotic origins of tensionless superstrings 
    Banerjee, Aritra (Elsevier, 2020-02)
    A new type of tensionless superstring theory, called the Inhomogeneous tensionless superstring, has been recently introduced. This is characterised by a residual symmetry algebra on the worldsheet richer in structure than ...
  • On interpolating anomalous dimension of twist-two operators with general spins 
    Banerjee, Aritra (Springer, 2019-07)
    We study non-perturbative interpolating functions to probe the physics of anomalous dimensions associated with twist-two operators in SYM of finite and infinite spin. Compared to previous studies, the novel result of this ...
  • Entanglement entropy for TT deformed CFT in general dimensions 
    Banerjee, Aritra (Elsevier, 2019-11)
    We consider deformation of a generic d dimensional () large-N CFT on a sphere by a spin-0 operator which is bilinear in the components of the stress tensor. Such a deformation has been proposed to be holographically dual ...
  • The tensionless path from closed to open strings 
    Banerjee, Aritra (APS, 2019-09)
    We reconsider the tensionless limit on bosonic closed string theory, where the 3D Bondi-Metzner-Sachs (BMS) algebra appears as symmetries on the world sheet, as opposed to two copies of the Virasoro algebra in the case of ...
  • On N-spike strings in conformal gauge with NS-NS fluxes 
    Banerjee, Aritra (Springer, 2019)
    The AdS3 × S3 string sigma model supported both by NS-NS and R-R fluxes has become a well known integrable model, however a putative dual field theory description remains incomplete. We study the anomalous dimensions of ...
  • Cosmography and flat Λ⁢CDM tensions at high redshift 
    Banerjee, Aritra (APS, 2020-12)
    Risaliti, Lusso, and collaborators have constructed a high-redshift Hubble diagram of supernovae (SNe), quasars (QSO), and gamma-ray bursts (GRBs) that shows a “∼4⁢𝜎 tension with the Λ⁢CDM model” based on a log polynomial ...
  • Ehlers transformations as EM duality in the double copy 
    Banerjee, Aritra (APS, 2020-12)
    Given a solution to 4D Einstein gravity with an isometry direction, it is known that the equations of motion are identical to those of a 3D 𝜎 model with target space geometry 𝑆⁢𝑈⁡(1,1)/𝑈⁡(1). Thus, any transformation ...
  • A tale of three — tensionless strings and vacuum structure 
    Banerjee, Aritra (Springer, 2020)
    Within the premise of canonical quantisation, we re-examine the quantum structure of bosonic tensionless string theory. In the classical theory, the worldsheet metric degenerates and the Bondi-Metnzer-Sachs (BMS) algebra ...
  • Hubble sinks in the low-redshift swampland 
    Banerjee, Aritra (APS, 2021)
    Local determinations of the Hubble constant 𝐻0 favor a higher value than Planck based on cosmic microwave background and Λ cold dark matter (Λ⁢CDM). Through a model-independent expansion, we show that low redshift (𝑧≲0.7) ...
  • Rindler Physics on the String Worldsheet 
    Banerjee, Aritra (APS, 2021-01)
    We construct the tensionless limit of bosonic string theory in terms of a family of worldsheets with increasing acceleration and show that the null string emerges in the limit of infinite acceleration when the Rindler ...
  • A Rindler road to Carrollian worldsheets 
    Banerjee, Aritra (Springer, 2022)
    The tensionless limit of string theory has recently been formulated in terms of worldsheet Rindler physics. In this paper, by considering closed strings moving in background Rindler spacetimes, we provide a concrete ...
  • Boosting to BMS 
    Banerjee, Aritra (Springer, 2022-09)
    Bondi-Metzner-Sachs (BMS) symmetries, or equivalently Conformal Carroll symmetries, are intrinsically associated to null manifolds and in two dimensions can be obtained as an Inönü-Wigner contraction of the two-dimensional ...
  • ModMax meets GCA 
    Banerjee, Aritra (2022-06)
    A maximally symmetric non-linear extension of Maxwell's theory in four dimensions called ModMax has been recently introduced in the literature. This theory preserves both electromagnetic duality and conformal invariance ...
  • Bootstrapping the Kronig-Penney Model 
    Banerjee, Aritra (APS, 2022-12)
    Recently, bootstrap methods from conformal field theory have been adapted for studying the energy spectrum of various quantum mechanical systems. In this paper, we consider the application of these methods in obtaining the ...
  • From CFTs to theories with Bondi-Metzner-Sachs symmetries: Complexity and out-of-time-ordered correlators 
    Banerjee, Aritra (2022-03)
    We probe the contraction from 2d relativistic CFTs to theories with Bondi-Metzner-Sachs (BMS) symmetries, or equivalently Conformal Carroll symmetries, using diagnostics of quantum chaos. Starting from an Ultrarelativistic ...
  • Carroll covariant scalar fields in two dimensions 
    Banerjee, Aritra (Springer, 2023-01)
    Conformal Carroll symmetry generically arises on null manifolds and is important for holography of asymptotically flat spacetimes, generic black hole horizons and tensionless strings. In this paper, we focus on two dimensional ...
  • Magic Fermions: Carroll and Flat Bands 
    Banerjee, Aritra (Springer, 2023-03)
    The Carroll algebra is constructed as the c → 0 limit of the Poincare algebra and is associated to symmetries on generic null surfaces. In this paper, we begin investigations of Carrollian fermions or fermions defined on ...

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