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E-print Articles: Recent submissions

  • Enhancing key rates of QKD protocol by coincidence detection 
    Sharma, Tanya; Bhavsar, Rutvij; Ramakrishnan, Jayanth; Chandravanshi, Pooja; Prabhakar, Shashi; Biswas, Ayan; Singh, R. P. (Cornell University Library, 2024-02)
    In theory, quantum key distribution (QKD) provides unconditional security; however, its practical implementations are susceptible to exploitable vulnerabilities. This investigation tackles the constraints in practical QKD ...
  • Dephasing enabled fast charging of quantum batteries 
    Shastri, Rahul; Jiang, Chao (Cornell University Library, 2024-02)
    We propose and analyze a universal method to obtain fast charging of a quantum battery by a driven charger system using controlled, pure dephasing of the charger. While the battery displays coherent underdamped oscillations ...
  • Probing the inverse moment of Bs-meson distribution amplitude via Bs→ns form factors 
    Mandal, Rusa; Patil, Praveen S.; Ray, Ipsita (Cornell University Library, 2024-02)
    We investigate the inverse moment of the Bs-meson light-cone distribution amplitude (LCDA), denoted as λBs and defined within the heavy quark effective theory, through the calculation of Bs→ηs form factors. The presence ...
  • Non-existence of short hairs for static black holes 
    Acharya, Soham; Sarkar, Sudipta (Cornell University Library, 2024-02)
    The black hole no-short hair theorem establishes a universal lower bound on the extension of hairs outside any 4-dimensional spherically symmetric black hole solutions. We generalise this theorem beyond spherical symmetry, ...
  • Collider signatures of WR boson in the alternative left-right model 
    Frank, Mariana; Majumdar, Chayan; Poulose, Poulose; Senapati, Supriya; Yajnik, Urjit A. (Cornell University Library, 2024-02)
    Alternative Left-Right Models offer an attractive option to left-right models. Emerging from E6 grand unification, these models are consistent with light scalars which do not induce flavour-changing neutral currents due ...
  • The early universe as an open quantum system: complexity and decoherence 
    Bhattacharyya, Arpan; Brahma, Suddhasattwa; Haque, S. Shajidul; Lund, Jacob S.; Pau, Arpon (Cornell University Library, 2024-01)
    In this work, we extend previous results, demonstrating how complexity in an open quantum system can identify decoherence between two fields, even in the presence of an accelerating background. Using the curved-space ...
  • Kibble-Zurek mechanism and errors of gapped quantum phases 
    Jamadagni, Amit; Kazemi, Javad; Bhattacharyya, Arpan (Cornell University Library, 2024-01)
    Kibble-Zurek mechanism relates the domain of non-equilibrium dynamics with the critical properties at equilibrium. It establishes a power law connection between non-equilibrium defects quenched through a continuous phase ...
  • Fast measurement of group index variation with ultimate precision using Hong-Ou-Mandel interferometry 
    Singh, Sandeep; Kumar, Vimlesh; Samanta, G. K. (Cornell University Library, 2024-01)
    Hong-Ou-Mandel (HOM) interferometry has emerged as a valuable tool for quantum sensing applications, particularly in measuring physical parameters that influence the relative optical delay between pair photons. Unlike ...
  • Observables from classical black hole scattering in scalar-tensor theory of gravity from worldline quantum field theory 
    Bhattacharyya, Arpan; Ghosh, Debodirna; Ghosh, Saptaswa; Pal, Sounak (Cornell University Library, 2024-01)
    In this article, we compute the two observables, impulse and waveform, in a black hole scattering event for the Scalar-Tensor theory of gravity with a generic scalar potential using the techniques of Worldline Quantum Field ...
  • Asymptotically de-Sitter black holes have non-zero tidal love numbers 
    Nair, Sreejith; Chakraborty, Sumanta; Sarkar, Sudipta (Cornell University Library, 2024-01)
    Love numbers of compact objects quantify their tidal deformability against external perturbations. It is expected that Love numbers of asymptotically flat black holes (BHs) in General Relativity are identically zero. We ...
  • Quantum-gravitational null Raychaudhuri equation 
    Bak, Sang-Eon; Parikh, Maulik; Sarkar, Sudipta; Setti, Francesco (Cornell University Library, 2023-12)
    We consider a congruence of null geodesics in the presence of a quantized spacetime metric. The coupling to a quantum metric induces fluctuations in the congruence; we calculate the change in the area of a pencil of geodesics ...
  • Symmetries of love: ladder structure of static and rotating black holes 
    Sharma, Chanchal; Ghosh, Rajes; Sarkar, Sudipta (Cornell University Library, 2024-01)
    Black hole solutions of general relativity exhibit a symmetry for the static perturbations around these spacetimes, known as ``ladder symmetry''. This symmetry proves useful in constructing a tower of solutions for ...
  • How i wonder where you are: pinpointing coalescing binary neutron star sources with the IGWN, including LIGO-Aundha 
    Shukla, Sachin R.; Pathak, Lalit; Sengupta, Anand S. (Cornell University Library, 2023-11)
    LIGO-Aundha (A1), the Indian gravitational wave detector, is expected to join the IGWN and begin operations in the early 2030s. We study the impact of A1 on the accuracy of determining the direction of incoming transient ...
  • Optical polarisation study of galactic open clusters 
    Uppal, Namita; Ganesh, Shashikiran; Joshi, Santosh; Sarker, Mrinmoy; Prajapati, Prachi; Dileep, Athul (Cornell University Library, 2023-11)
    Dust is a ubiquitous component in our Galaxy. It accounts for only 1% mass of the ISM but still is an essential part of the Galaxy. It affects our view of the Galaxy by obscuring the starlight at shorter wavelengths and ...
  • Prospects of detecting deviations to Kerr geometry with radiation reaction effects in EMRIs 
    Kumar, Shailesh; Chowdhuri, Abhishek; Bhattacharyya, Arpan (Cornell University Library, 2023-11)
    Direct detection of gravitational waves and binary black hole mergers have proven to be remarkable investigations of general relativity. In order to have a definitive answer as to whether the black hole spacetime under ...
  • Template bank to search for exotic gravitational wave signals from astrophysical compact binaries 
    Sharma, Abhishek; Roy, Soumen; Sengupta, Anand S. (Cornell University Library, 2023-11)
    Modeled searches of gravitational wave signals from compact binary mergers rely on template waveforms determined by the theory of general relativity (GR). Once a signal is detected, one generally performs the model agnostic ...
  • Formation and stability of area quantized black holes 
    Chakravarti, Kabir; Ghosh, Rajes; Sarkar, Sudipta (Cornell University Library, 2023-10)
    We investigate the ergoregion instability of area-quantized rotating quantum black holes (QBH) under gravitational perturbation. We show that the instability can be avoided in binary systems that include QBHs if the ...
  • B→D*0 and Bs→D*s0 form factors from QCD light-cone sum rules 
    Gubernari, Nico; Khodjamirian, Alexander; Mandal, Rusa; Mannel, Thomas (Cornell University Library, 2023-09)
    We present the first application of QCD light-cone sum rules (LCSRs) with B(s)-meson distribution amplitudes to the B(s) D (s)0 form factors, where D(s)0 is a charmed scalar meson. We consider two scenarios for the D0 ...
  • Collective excitations of a hot QCD medium in a time dependent background magnetic field 
    Gowthama, K. K.; Chandra, Vinod (Cornell University Library, 2023-09)
    Collective modes within a hot Quantum Chromodynamics (QCD) medium are obtained from the polarization tensor, considering both constant and time-varying electromagnetic fields. In both scenarios, five complex modes emerge, ...
  • Prompt sky localization of compact binary sources using mesh free approximation 
    Pathak, Lalit; Munishwar, Sanket; Reza, Amit; Sengupta, Anand S. (Cornell University Library, 2023-09)
    The number of gravitational wave signals from the merger of compact binary systems detected in the network of advanced LIGO and Virgo detectors is expected to increase considerably in the upcoming science runs. Once a ...

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