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Browsing Department of Physics by Title

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  • QCD, Gravitational Waves, and Pulsars 
    Layek, Biswanath (ARXIV, 2023-05)
    Investigations of the phase diagram of quantum chromodynamics (QCD) have revealed that exotic new phases, the so called {\it color superconducting phases}, may arise at very high baryon densities. It is speculated that ...
  • qPlus atomic force microscopy of the Si(100) surface: Buckled, split-off, and added dimers 
    Gangopadhyay, Subhashis (AIP, 2009-08)
    Dimer configurations at the Si(100) surface have been studied with noncontact atomic force microscopy in the qPlus mode at 77 K, using both large (10 nm peak to peak) and small (0.5 nm peak to peak) oscillation amplitudes. ...
  • Quantum baryon number fluctuations in subsystems of a hot and dense relativistic gas of fermions 
    Das, Arpan (2021-05)
    Quantum features of the baryon number fluctuations in subsystems of a hot and dense relativistic gas of fermions are analyzed. We find that the fluctuations in small systems are significantly increased compared to their ...
  • Quantum Coherence and Sensitivity of Avian Magnetoreception 
    Bandyopadhyay, Jayendra N. (APS, 2012-09)
    Recently there has been growing interest in the application of quantum mechanics to understand many biological phenomena such as photosynthesis [1–7], the process of olfaction [8,9], enzymatic reactions [10,11], and ...
  • Quantum fluctuations of energy in subsystems of a hot relativistic gas 
    Das, Arpan (2020-12)
    We derive a formula that defines quantum fluctuations of energy in subsystems of a hot relativistic gas. For small subsystem sizes we find substantial increase of fluctuations compared to those known from standard thermodynamic ...
  • Quantum potential for diffraction and exchange effects 
    Dutta, Sandipan (Wiley, 2009-04)
    Semiclassical methods of statistical mechanics can incorporate essential quantum effects by using effective quantum potentials. An ideal Fermi gas interacting with an impurity is represented by a classical fluid with ...
  • Quantum spectrum as a time series: Fluctuation measures 
    Bandyopadhyay, Jayendra N. (APS, 2006-01)
    The fluctuations in the quantum spectrum could be treated like a time series. In this framework, we explore the statistical self-similarity in the quantum spectrum using the detrended fluctuation analysis (DFA) and random ...
  • Quantum state complexity meets many-body scars 
    Banerjee, Aritra (IOP, 2024-01)
    Scar eigenstates in a many-body system refers to a small subset of non-thermal finite energy density eigenstates embedded into an otherwise thermal spectrum. This novel non-thermal behaviour has been seen in recent experiments ...
  • Quantum statistical fluctuation of energy and its novel pseudo-gauge dependence 
    Das, Arpan (IOP, 2022-06)
    We discuss the quantum statistical fluctuations of energy in subsystems of hot relativistic gas for both spin-zero and spin-half particles. We explicitly show the system size dependence of the quantum statistical fluctuation ...
  • Quark Loop Contribution to Neutron EDM from R-parity Violation 
    Vaidya, Rishikesh (ARXIV, 2005-05)
    We present a detailed analysis together with numerical calculations on one-loop contributions to the neutron electric dipole moment from supersymmetry without R parity, focusing on the quark-scalar loop contributions. ...
  • Quark loop contributions to neutron, deuteron, and mercury electric dipole moments from supersymmetry without R parity 
    Vaidya, Rishikesh (APS, 2007-07)
    We present a detailed analysis together with numerical calculations on one-loop contributions to the neutron, deuteron, and mercury electric dipole moment from supersymmetry without R parity, focusing on the quark-scalar ...
  • Quarkonia suppression in small systems with a nonadiabatic evolution 
    Das, Arpan (APS, 2024-07)
    In high multiplicity proton-proton (𝑝−𝑝) collisions, the formation of a deconfined state of quarks and gluons akin to heavy ion collisions (HIC) has been a subject of significant interest. In proton-proton (𝑝 −𝑝) ...
  • Quasi-binary incident electron—centre of mass collision in (e, 3e) process on He and He-like ions 
    Choubisa, Rakesh (Springer, 2005-07)
    We present in this communication the results of our first Born calculation in the three-Coulomb (3C) wave approach for the (e, 3e) process on He and He-like ions at an incident electron energy 5599 eV in the coplanar ...
  • Quenching of Hadron Spectra in a chemically equilibrating Quark-Gluon Plasma 
    Mishra, Madhukar (ARXIV, 2007-03)
    Using the Fokker-Planck equation we have studied the drag co-efficient A(t) and the consequent shift Δp⊥(L) in the transverse momentum due to collisional energy loss of energetic partons while passing through a chemically ...
  • Radiative B decays in supersymmetry without R parity 
    Vaidya, Rishikesh (APS, 2005-03)
    We present a systematic analysis of all the contributions at the leading log order to the branching ratio of the inclusive radiative decay B→Xs+γ in the framework of supersymmetry without R parity. The relevant set of ...
  • Radiative B decays in Supersymmetry without R-parity 
    Vaidya, Rishikesh (ARXIV, 2004-11)
    We present a systematic analysis of all the contributions at the leading log order to the branching ratio of the inclusive radiative B decay, B --> X_s + gamma in the framework of supersymmetry without R-parity. The relevant ...
  • Random matrix analysis of complex networks 
    Bandyopadhyay, Jayendra N. (APS, 2007-01)
    We study complex networks under random matrix theory (RMT) framework. Using nearest-neighbor and next-nearest-neighbor spacing distributions we analyze the eigenvalues of the adjacency matrix of various model networks, ...
  • Random matrix analysis of network Laplacians 
    Bandyopadhyay, Jayendra N. (Elsevier, 2008-01)
    We analyse the eigenvalue fluctuations of the Laplacian of various networks under the random matrix theory framework. Analyses of random networks, scale-free networks and small-world networks show that the nearest neighbor ...
  • Randomness of random networks: A random matrix analysis 
    Bandyopadhyay, Jayendra N. (Sci Egngine, 2009-08)
    We analyze complex networks under the random matrix theory framework. Particularly, we show that statistics, which gives information about the long-range correlations among eigenvalues, provides a measure of randomness in ...
  • Randomness of random networks: A random matrix analysis 
    Bandyopadhyay, Debashis (IOP, 2009-09)
    We analyze complex networks under the random matrix theory framework. Particularly, we show that Δ3 statistics, which gives information about the long-range correlations among eigenvalues, provides a measure of randomness ...

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