Publications (19)
Exchange bias with Fe substitution in LaMnO_3
M. Patra, K. De, S. Majumdar +1
The exchange bias (EB) in LaMn_{0.7}Fe_{0.3}O_3 is observed by the negative shift and training effect of the hysteresis loops, while the sample was cooled in external magnetic fiel…
Decay Rate Distributions of Disordered Slabs and Application to Random Lasers
M. Patra
We compute the distribution of the decay rates (also referred to as residues) of the eigenstates of a disordered slab from a numerical model. From the results of the numerical simu…
Exchange bias effect involved with tunneling magnetoresistance in polycrystalline La_{0.88}Sr_{0.12}CoO_3
M. Patra, S. Majumdar, S. Giri
We report the exchange bias (EB) effect along with tunneling magnetoresistance (MR) in polycrystalline La_{0.88}Sr_{0.12}CoO_3. Analogous to the shift in the magnetic hysteresis lo…
Exchange bias effect and intragranular magnetoresistance in Nd$_{0.84}Sr_{0.16}CoO_3
M. Patra, S. Majumdar, S. Giri
Electrical transport properties as a function of magnetic field and time have been investigated in polycrystalline, Nd_{0.84}Sr_{0.16}CoO_3. A strong exchange bias (EB) effect is o…
Excess noise for coherent radiation propagating through amplifying random media
M. Patra, C. W. J. Beenakker
A general theory is presented for the photodetection statistics of coherent radiation that has been amplified by a disordered medium. The beating of the coherent radiation with the…
The Large Hadron-Electron Collider at the HL-LHC
P. Agostini, H. Aksakal, S. Alekhin +333
The Large Hadron electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting ener…
Propagation of squeezed radiation through amplifying or absorbing random media
M. Patra, C. W. J. Beenakker
We analyse how nonclassical features of squeezed radiation (in particular the sub-Poissonian noise) are degraded when it is transmitted through an amplifying or absorbing medium wi…
Long-range correlation of thermal radiation
M. Patra, C. W. J. Beenakker
A general theory is presented for the spatial correlations in the intensity of the radiation emitted by a random medium in thermal equilibrium. We find that a non-zero correlation…
Molecular Dynamics Simulations of Lipid Bilayers: Major Artifacts due to Truncating Electrostatic Interactions
M. Patra, M. Karttunen, M. Hyvonen +3
We study the influence of truncating the electrostatic interactions in a fully hydrated pure dipalmitoylphosphatidylcholine (DPPC) bilayer through 20 ns molecular dynamics simulati…
Quantum-limited linewidth of a chaotic laser cavity
M. Patra, H. Schomerus, C. W. J. Beenakker
A random-matrix theory is presented for the linewidth of a laser cavity in which the radiation is scattered chaotically. The linewidth is enhanced above the Schawlow-Townes value b…
Glassy magnetic phase driven by short range charge and magnetic ordering in nanocrystalline LaSrFeO: Magnetization, Mossbauer, and polarised neutron studies
Sk. Sabyasachi, M. Patra, S. Majumdar +6
The charge ordered LaSrFeO (LSFO) in bulk and nanocrystalline forms are investigated using ac and dc magnetization, Mössbauer, and polarised neutron studi…
Magnetic and magnetoresistive properties of cubic Laves phase HoAl single crystal
M. Patra, S. Majumdar, S. Giri +2
We report the magnetization () and magnetoresistance (MR) results of HoAl single crystals oriented along and directions. Although HoAl has cubic Laves ph…
Frequency dependence of the photonic noise spectrum in an absorbing or amplifying diffusive medium
E. G. Mishchenko, M. Patra, C. W. J. Beenakker
A theory is presented for the frequency dependence of the power spectrum of photon current fluctuations originating from a disordered medium. Both the cases of an absorbing medium…
Exchange bias effect in the phase separated Nd_{1-x}Sr_{x}CoO_3 at the spontaneous ferromagnetic/ferrimagnetic interface
M. Patra, M. Thakur, S. Majumdar +1
We report the new results of exchange bias effect in Nd_{1-x}Sr_{x}CoO_3 for x = 0.20 and 0.40, where the exchange bias phenomenon is involved with the ferrimagnetic (FI) state in…
Photonic excess noise and wave localization
C. W. J. Beenakker, M. Patra, P. W. Brouwer
This is a theory for the effect of localization on the super-Poissonian noise of radiation propagating through an absorbing disordered waveguide. Localization suppresses both the m…
Photon shot noise
C. W. J. Beenakker, M. Patra
A recent theory is reviewed for the shot noise of coherent radiation propagating through a random medium. The Fano factor P/I (the ratio of the noise power and the mean transmitted…
Theory for the photon statistics of random lasers
M. Patra
A theory for the photon statistics of a random laser is presented. Noise is described by Langevin operators, where both fluctuations of the electromagnetic field and of the medium…
Quantum limit of the laser linewidth in chaotic cavities and statistics of residues of scattering matrix poles
H. Schomerus, K. M. Frahm, M. Patra +1
The quantum-limited linewidth of a laser cavity is enhanced above the Schawlow-Townes value by the Petermann factor K, due to the non-orthogonality of the cavity modes. We derive t…
Large Petermann factor in chaotic cavities with many scattering channels
K. Frahm, H. Schomerus, M. Patra +1
The quantum-limited linewidth of a laser cavity is enhanced above the Schawlow-Townes value by the Petermann factor K, due to the non-orthogonality of the cavity modes. The average…