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  • Bath deformations, islands and holographic complexity 
    Bhattacharya, Aranya; Bhattacharyya, Arpan; Nandy, Pratik; Patra, Ayan K. (Cornell University, 2021-12)
    Considering a doubly holographic model, we study the evolution of holographic subregion complexity corresponding to deformations of bath state by a relevant scalar operator, which corresponds to a renormalization group ...
  • Complexity for open quantum system 
    Bhattacharyya, Arpan; Hanif, Tanvir; Haque, S. Shajidul; Rahman, Md Khaledur (Cornell University Library, 2021-12)
    We study the complexity for an open quantum system. Our system is a harmonic oscillator coupled to a one-dimensional massless scalar field, which acts as the bath. Specifically, we consider the reduced density matrix by ...
  • No hair theorems for static and stationary reflecting star 
    Bhattacharjee, Srijit; Sarkar, Sudipta (Cornell University Library, 2017-04)
    We prove the non existence of massive scalar, vector and tensor hairs outside the surface of a static and stationary compact reflecting star. Our result is the extension of the no hair theorem for black holes to horizonless ...
  • Partial islands and subregion complexity in geometric secret-sharing model 
    Bhattacharya, Aranya; Bhattacharyya, Arpan; Nandy, Pratik; Patra, Ayan K. (Cornell University Library, 2021-09)
    We compute the holographic subregion complexity of a radiation subsystem in a geometric secret-sharing model of Hawking radiation in the "complexity=volume" proposal. The model is constructed using multiboundary wormhole ...
  • Shadow analysis for rotating black holes in the presence of plasma for an expanding universe 
    Chowdhuri, Abhishek; Bhattacharyya, Arpan (Cornell University Library, 2020-12)
    We explore the structure of shadow for a Kerr-de Sitter black hole with a non-magnetized, pressureless plasma surrounding it. Specific plasma distributions are considered to separate the Hamilton-Jacobi equation and find ...
  • Signature of non-uniform area quantization on black hole echoes 
    Chakravarti, Kabir; Ghosh, Rajes; Sarkar, Sudipta (Cornell University, 2021-12)
    A classical black hole is characterized by a horizon that absorbs radiation of all frequencies incident on it. Perturbation of these black holes is well-understood via exponentially damped sinusoids known as quasi-normal ...

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