Anil Kumar
Articles written in Pramana – Journal of Physics
Volume 12 Issue 5 May 1979 pp 511-522 Liquids
Impurity effects on the critical behaviour of the electrical resistance of binary liquid mixtures
The electrical resistance of the binary liquid system cyclohexane + acetic anhydride is measured, in the critical region, both in the pure mixture and when the mixture is doped with small amounts (≈ 100 ppm) of H_{2}O/D_{2}O impurities.
Volume 23 Issue 5 November 1984 pp 547-557 Experimental Techniques
Flip angle dependence in two-dimensional multiple quantum coherence
N Murali Y V S Ramakrishna K Chandrasekhar M Albert Thomas Anil Kumar
The multiple-quantum pathway description developed earlier for two-dimensional single-quantum correlation spectroscopy (
Volume 29 Issue 4 October 1987 pp 385-390 Atomic Physics
Evaluation of one-centre electron interaction integrals over slater type atomic orbitals
Simplified expressions for one-centre electron interaction integrals in general and Slater-Condon parameters as well as repulsion integrals of the type (
Volume 56 Issue 5 May 2001 pp L705-L713 Rapid Communication
Quantum entanglement in the NMR implementation of the Deutsch-Jozsa algorithm
Arvind Kavita Dorai Anil Kumar
A scheme to execute an 𝑛-bit Deutsch-Jozsa (DJ) algorithm using 𝑛 qubits has been implemented for up to three cubits on an NMR quantum computer. For the one- and the two-bit Deutsch problem, the qubits do not get entangled, and the NMR implementation is achieved without using spin-spin interactions. It is for the three-bit case, that the manipulation of entangled states becomes essential. The interactions through scalar 𝐽-couplings in NMR spin systems have been exploited to implement entangling transformations required for the three bit DJ algorithm.
Volume 59 Issue 2 August 2002 pp 243-254
Anil Kumar K V Ramanathan T S Mahesh Neeraj Sinha KVRM Murali
Use of dipolar and quadrupolar couplings for quantum information processing (QIP) by nuclear magnetic resonance (NMR) is described. In these cases, instead of the individual spins being qubits, the 2^{n} energy levels of the spin-system can be treated as an
Volume 68 Issue 1 January 2007 pp 75-81 Research Articles
The kinetics of Cr layer coated on TiNi films for hydrogen absorption
M Singh Vaibhav Kulsherstha Anil Kumar N K Acharaya Y K Vijay
The effect of hydrogen absorption on electrical resistance with temperature for TiNi and TiNi–Cr thin films was investigated. The TiNi thin films of thickness 800 Å were deposited at different angles ($\theta = 0^{\circ}, 30^{\circ}, 45^{\circ}, 60^{\circ}$ and $75^{\circ}) under 10$^{−5}$ Torr pressure by thermal evaporation on the glass substrate at room temperature. A layer of Cr of thickness 100 Å was coated on the TiNi thin films. The changing rate of hydrogen absorption increases after Cr layer coating because Cr enhances the catalytic properties of hydrogen absorption in thin films. The rate of hydrogen absorption increases with temperature at lower range but at higher range of temperature it was found to decrease and also it was found that the hydrogen absorption increases with angle of deposition.
Volume 71 Issue 1 July 2008 pp 143-155 Research Articles
Effect of normal processes on thermal conductivity of germanium, silicon and diamond
The effect of normal scattering processes is considered to redistribute the phonon momentum in (a) the same phonon branch – KK-S model and (b) between different phonon branches – KK-H model. Simplified thermal conductivity relations are used to estimate the thermal conductivity of germanium, silicon and diamond with natural isotopes and highly enriched isotopes. It is observed that the consideration of the normal scattering processes involving different phonon branches gives better results for the temperature dependence of the thermal conductivity of germanium, silicon and diamond with natural and highly enriched isotopes. Also, the estimation of the lattice thermal conductivity of germanium and silicon for these models with the consideration of quadratic form of frequency dependences of phonon wave vector leads to the conclusion that the splitting of longitudinal and transverse phonon modes, as suggested by Holland, is not an essential requirement to explain the entire temperature dependence of lattice thermal conductivity whereas KK-H model gives a better estimation of the thermal conductivity without the splitting of the acoustic phonon modes due to the dispersive nature of the phonon dispersion curves.
Volume 76 Issue 4 April 2011 pp 681-690
Bianchi type-V string cosmological models in general relativity
Anil Kumar Yadav Vineet Kumar Yadav Lallan Yadav
Bianchi type-V string cosmological models in general relativity are investigated. To get the exact solution of Einstein’s ﬁeld equations, we have taken some scale transformations used by Camci et al [Astrophys. Space Sci.
Volume 92 Issue 2 February 2019 Article ID 0020 Research Article
KAMAL KUMAR GULATI SANJAY GULIA NITESH KUMAR ANIL KUMAR SWARAN KUMARI VIJAYETA GAMBHIR M N REDDY
A transportable, trolley-mounted stand-off explosive material detection system based on the time-gated Raman spectroscopy was developed and tested in our laboratory. This system is capable of identifying the explosives and improvised explosive materials located up to a distance of 30 m. A frequency tripled Nd:YAG, nanosecond pulsed laser (355 nm, 6 ns) operated at 10 Hz was used as an excitation source to induce Raman spectra of explosive materials under investigation. A reflected type 200 mm aperture telescope designed using Zemax opticaldesign software was used to collect the backscattered Raman signals. Raman signals were recorded using the gated intensified charge coupled device (ICCD) spectrograph. A LabVIEW-based data acquisition and analysis software for real-time identification of materials was developed and used. It gives audio as well as text alarm to the operatorabout threat identification.
Volume 92 Issue 2 February 2019 Article ID 0026 Research Article
Hybrid scheme for factorisation: Factoring 551 using a 3-qubit NMR quantum adiabatic processor
SOHAM PAL SARANYO MOITRA V S ANJUSHA ANIL KUMAR T S MAHESH
Quantum processors are potentially superior to their classical counterparts for many computational tasks including factorisation. Circuit methods as well as adiabatic methods have already been proposed and implemented for finding the factors of a given composite number. The main challenge in scaling it to larger numbers is the unavailability of large number of qubits. Here, we propose a hybrid scheme that involves both classical and quantum computation, based on the previous work of Peng
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