Publications (35)
TAPS Responsibility Matrix: A tool for responsible data science by design
Visara Urovi, Remzi Celebi, Chang Sun +6
Data science is an interdisciplinary research area where scientists are typically working with data coming from different fields. When using and analyzing data, the scientists impl…
Ion transport study of mechanically-milled amorphous AgI-Ag2O-V2O5 fast ionic conductors
Parveen Kumar, K. Shahi
The structural and electrical characterizations of mechanically-milled (MM) amorphous fast ionic conductors (a-FICs), viz. xAgI (100-x)[0.67 Ag\_2 O-0.33V\_2O\_5] (x = 40, 50, 55 a…
Weak-measurement-induced asymmetric dephasing: manifestation of intrinsic measurement chirality
Kyrylo Snizhko, Parveen Kumar, Nihal Rao +1
Geometrical dephasing is distinct from dynamical dephasing in that it depends on the trajectory traversed, hence it reverses its sign upon flipping the direction in which the path…
Comment on "How to observe and quantify quantum-discord states via correlations"
Parveen Kumar, Kyrylo Snizhko
The protocol proposed in the commented-upon article can certify zero discord; however, it fails to quantify non-zero discord for some states. Further, the protocol is less efficien…
Polarimetric and spectroscopic study of radio-quiet weak emission line quasars
Parveen Kumar, H. Chand, R. Srianand +3
A small subset of optically selected radio-quiet quasars showing weak or no emission lines may turn out to be the elusive radio-quiet BL Lac objects, or simply be radio-quiet QSOs…
An Evolutionary Formalism for Weak Quantum Measurements
Apoorva Patel, Parveen Kumar
Unitary evolution and projective measurement are fundamental axioms of quantum mechanics. Even though projective measurement yields one of the eigenstates of the measured operator…
Intranight Optical Variability of Radio-Quiet Weak Emission Line Quasars-II
Hum Chand, Parveen Kumar, Gopal-Krishna
This is continuation of our search for the elusive radio-quiet blazars, by carrying out a systematic programme to detect intranight optical variability (INOV) in a subset of `Weak-…
Stable determination of time-dependent coefficients in a reaction-diffusion-convection system
Rahul Bhardwaj, Parveen Kumar
In this manuscript, we investigate an inverse boundary value problem for a reaction-diffusion-convection system in a bounded domain of , . We aim to obta…
General theory of slow non-Hermitian evolution
Parveen Kumar, Yuval Gefen, Kyrylo Snizhko
Non-Hermitian systems are widespread in both classical and quantum physics. The dynamics of such systems has recently become a focal point of research, showcasing surprising behavi…
Best Proximity Point Results for Cyclic Orbital Contraction Mappings in Metric Spaces
Parveen Kumar, Ankit Kumar, Manu Rohilla
In this paper, we introduce the concept of cyclic orbital contraction mappings which generalizes the concept of cyclic contraction mappings. We establish the existence of best prox…
FP-tree and COFI Based Approach for Mining of Multiple Level Association Rules in Large Databases
Virendra Kumar Shrivastava, Parveen Kumar, K. R. Pardasani
In recent years, discovery of association rules among itemsets in a large database has been described as an important database-mining problem. The problem of discovering associatio…
A Low Overhead Minimum Process Global Snapshop Collection Algorithm for Mobile Distributed System
Surender Kumar, R. K. Chauhan, Parveen Kumar
Coordinated checkpointing is an effective fault tolerant technique in distributed system as it avoids the domino effect and require minimum storage requirement. Most of the earlier…
Engineering two-qubit mixed states with weak measurements
Parveen Kumar, Kyrylo Snizhko, Yuval Gefen
It is known that protocols based on weak measurements can be used to steer quantum systems into pre-designated pure states. Here we show that weak-measurement-based steering protoc…
Minimum Process Coordinated Checkpointing Scheme for Ad Hoc Networks
Ruchi Tuli, Parveen Kumar
The wireless mobile ad hoc network (MANET) architecture is one consisting of a set of mobile hosts capable of communicating with each other without the assistance of base stations.…
Weak-measurement-induced phases and dephasing: broken symmetry of the geometric phase
Kyrylo Snizhko, Nihal Rao, Parveen Kumar +1
Coherent steering of a quantum state, induced by a sequence of weak measurements, has become an active area of theoretical and experimental study. For a closed steered trajectory,…
Optimized Steering: Quantum State Engineering and Exceptional Points
Parveen Kumar, Kyrylo Snizhko, Yuval Gefen +1
The state of a quantum system may be steered towards a predesignated target state, employing a sequence of weak measurements (where the detector's readouts are tra…
Quantum Trajectory Distribution for Weak Measurement of a Superconducting Qubit: Experiment meets Theory
Parveen Kumar, Suman Kundu, Madhavi Chand +2
Quantum measurements are described as instantaneous projections in textbooks. They can be stretched out in time using weak measurements, whereby one can observe the evolution of a…
Local Magnetometry from Measurement-Induced Dissipation
Rishith Reddy, Parveen Kumar, Ankur Das
Magnetic phases are commonly identified through macroscopic magnetization, yet many ordered states, including antiferromagnets and altermagnets, possess a vanishing net moment desp…
Intranight Optical Variability of Radio-Quiet Weak Emission Line Quasars-III
Parveen Kumar, Gopal-Krishna, Hum Chand
This is continuation of our programme to search for the elusive radio-quiet BL Lacs, by carrying out a systematic search for intranight optical variability (INOV) in a subset of `w…
Weak Measurements, Quantum State Collapse and the Born Rule
Apoorva Patel, Parveen Kumar
Projective measurement is used as a fundamental axiom in quantum mechanics, even though it is discontinuous and cannot predict which measured operator eigenstate will be observed i…
Interference of local-measurement histories
Parveen Kumar, Igor V. Gornyi, Yuval Gefen
The evolution of a quantum system comprises two fundamental processes--continuous unitary dynamics and stochastic measurement-induced jumps. The latter are often viewed as a source…
Gradually opening Schrödinger's box reveals a cascade of sharp dynamical transitions
Barkay Guttel, Danielle Gov, Noam Netzer +9
Quantum mechanics predicts that unobserved systems may exist in a superposition of states, yet measurement produces definite outcomes, a tension at the heart of the quantum-to-clas…
Analysis of Recent Checkpointing Techniques for Mobile Computing Systems
Ruchi Tuli, Parveen Kumar
Recovery from transient failures is one of the prime issues in the context of distributed systems. These systems demand to have transparent yet efficient techniques to achieve the…
Quantum error correction using weak measurements
Parveen Kumar, Apoorva Patel
The standard quantum error correction protocols use projective measurements to extract the error syndromes from the encoded states. We consider the more general scenario of weak me…
Quantum Zeno effect with partial measurement and noisy dynamics
Parveen Kumar, Alessandro Romito, Kyrylo Snizhko
We study the Quantum Zeno Effect (QZE) induced by continuous partial measurement in the presence of short-correlated noise in the system Hamiltonian. We study the survival probabil…
Quantum Zeno effect appears in stages
Kyrylo Snizhko, Parveen Kumar, Alessandro Romito
In the quantum Zeno effect, quantum measurements can block the coherent oscillation of a two level system by freezing its state to one of the measurement eigenstates. The effect is…
Reconstruction of time-dependent coefficients in a semilinear dynamical Schr{ö}dinger equation
Parveen Kumar, Gen Nakamura, Manmohan Vashisth
In the present manuscript, we study an inverse problem related to a semilinear dynamical Schr{ö}dinger equation with lower order terms, in a bounded domain of $\Rb^{1+n},n\geq 2$.…
Optimal Thermalization under Indefinite Causal Order with Identical and Asymmetric Baths
Neeraj Sharma, Parveen Kumar
Indefinite causal order (ICO), in which the order of quantum operations is placed in a coherent superposition, has been demonstrated to enhance various information-processing tasks…
A Theoretical Study on Band-Gap Engineering of CsCaI3 by Si Doping for Photo Voltaic Applications
Krishnaraj Kundavu, Parveen Kumar, R. P. Chauhan
Density functional theory based First Principles calculations were used to study the effect of Silicon (Si) doping on the structural, electronic and optical properties of CsCaI3. F…
Near-unit efficiency of chiral state conversion via hybrid-Liouvillian dynamics
Parveen Kumar, Kyrylo Snizhko, Yuval Gefen
Following the evolution under a non-Hermitian Hamiltonian (nHH) involves significant probability loss. This makes various nHH effects impractical in the quantum realm. In contrast,…
Intranight Optical Variability of Radio-Quiet Weak Emission Line Quasars-IV
Parveen Kumar, Hum Chand, Gopal-Krishna
We report an extension of our program to search for radio-quiet BL Lac candidates using intra-night optical variability (INOV) as a probe. The present INOV observations cover a wel…
Violations of the Leggett-Garg inequality in Hybrid Liouvillian Dynamics: The Nonlinear Role of Detector Efficiency
Sourav Paul, Parveen Kumar, Sourin Das
Violations of the Leggett-Garg inequality (LGI) up to its algebraic bound under non-Hermitian dynamics are well established theoretically. Here, we demonstrate that such extreme vi…
Coupled best proximity point theorems for -cyclic -contraction and -cyclic Kannan nonexpansive mappings
Parveen Kumar, Ankit Kumar
In this paper, the notions of -cyclic -contraction and -cyclic Kannan nonexpansive mappings are introduced, and the existence of coupled best proximity points for such ma…
Intra-night optical variability and radio characteristics of extremely radio-loud narrow-line Seyfert 1 galaxies
Veeresh Singh, Parveen Kumar, Avik Kumar Das +1
Narrow-line Seyfert 1 galaxies (NLS1s) are generally known to be radio-quiet Active Galactic Nuclei (AGN), but a tiny subset of them are found to be extremely radio-loud with radio…
Quantum state engineering by steering in the presence of errors
E. Medina-Guerra, Parveen Kumar, I. V. Gornyi +1
Quantum state engineering plays a vital role in various applications in the field of quantum information. Different strategies, including drive-and-dissipation, adiabatic cooling,…