51 citations · 134 across the 24 of their papers we have counts for
25 papers
Generation of large Fock states from coherent states using Kerr interaction and displacement
Nilakantha Meher, Anirban Pathak, S. Sivakumar
We discuss a scheme to generate large Fock states. The scheme involves repeatedly applying an experimentally feasible unitary transformation to convert a semiclassical state into a…
Towards Nonlinear Quantum Thermodynamics
Gershon Kurizki, Nilakantha Meher, Avijit Misra +2
We have recently put forth several schemes of unconventional, nonlinearly-enabled thermodynamic (TD) devices that can operate in either the classical or the quantum domain by trans…
Nonlinearity and Quantumness in Thermodynamics: From Principles to Technologies
Gershon Kurizki, Nilakantha Meher, Tomáš Opatrný
The impact of quantum mechanics on thermodynamics, particularly on the principles and designs of heat machines (HM), has been limited by the incompatibility of quantum coherent evo…
Thermodynamic sensing of quantum nonlinear noise correlations
Nilakantha Meher, Tomáš Opatrný, Gershon Kurizki
We put forth the concept of quantum noise sensing in nonlinear two-mode interferometers coupled to mechanical oscillators. These autonomous machines are capable of sensing quantum…
Quantum optics in MATLAB
Nilakantha Meher
We provide a MATLAB numerical guide at the beginner level to support students starting their research careers in theoretical quantum optics and related areas. These resources are a…
Supersensitive phase estimation by thermal light in a Kerr-nonlinear interferometric setup
Nilakantha Meher, Eilon Poem, Tomáš Opatrný +2
Estimation of the phase delay between interferometer arms is the core of transmission phase microscopy. Such phase estimation may exhibit an error below the standard quantum (shot-…
Limitations to Realize Quantum Zeno Effect in Beam Splitter Array -- a Monte Carlo Wavefunction Analysis
Nilakantha Meher, Akhil Raman, S. Sivakumar
Effects of non-ideal optical components in realizing quantum Zeno effect in an all-optical setup are analyzed. Beam splitters are the important components in this experimental conf…
Direct measurement of atomic entanglement via cavity photon statistics
Nilakantha Meher, M. Bhattacharya, Anand K. Jha
We propose an experimental scheme for the measurement of entanglement between two two-level atoms. Our scheme requires one of the two entangled atoms to interact with a cavity fiel…
A review on quantum information processing in cavities
Nilakantha Meher, S. Sivakumar
The processing of information and computation is undergoing a paradigmatic shift since the realization of the enormous potential of quantum features to perform these tasks. Coupled…
Nonlinear coherent heat machines and closed-system thermodynamics
Tomáš Opatrný, Šimon Bräuer, Abraham G. Kofman +5
All existing heat machines are dissipative open systems. Hence, they cannot operate fully coherently. We propose to replace this conventional thermodynamic paradigm by a completely…
Measurement of two-photon position-momentum EPR correlations through single-photon intensity measurements
Abhinandan Bhattacharjee, Nilakantha Meher, Anand K. Jha
The measurement of the position-momentum EPR correlations of a two-photon state is important for many quantum information applications ranging from quantum key distribution to coin…
Dependence of the photon statistics of down-converted field-modes on the photon statistics of pump field-mode
Nilakantha Meher, Anand K. Jha
Using the zero time-delay second-order correlation function for studying the photon statistics, we investigate how the photon statistics of the field-modes generated by parametric…
Simulation of single photon dynamics in coupled cavities through IBM quantum computer
Nilakantha Meher, Bikash K. Behera, Prasanta K. Panigrahi
We design a quantum circuit in IBM quantum computer that mimics the dynamics of single photon in a coupled cavity system. By suitably choosing the gate parameters in the quantum ci…
Intrinsic degree of coherence of two-qubit states and measures of two-particle quantum correlations
Nilakantha Meher, Abu Saleh Musa Patoary, Girish Kulkarni +1
Recently, a basis-invariant measure of coherence known as the intrinsic degree of coherence has been established for classical and single-particle quantum states [JOSA B {\bf 36},…
Scheme for realizing quantum dense coding via entanglement swapping
Nilakantha Meher
Quantum dense coding is a protocol for transmitting two classical bits of information from a sender (Alice) to a remote receiver (Bob) by sending only one quantum bit (qubit). In t…
Perfect Quantum State Transfer in Glauber-Fock Cavity Array
Nilakantha Meher
We study transfer of single photon in an one-dimensional finite Glauber-Fock cavity array whose coupling strengths satisfy a square root law. The evolved state in the array can be…
A proposal for the implementation of quantum gates in an optomechanical system via phonon blockade
Nilakantha Meher
We propose a scheme to implement quantum controlled NOT gate and quantum phase gate in an optomechanical system based on phonon blockade. For appropriate choices of system paramete…
Enhancing phase sensitivity with number state filtered coherent states
Nilakantha Meher, S. Sivakumar
Number state filtered coherent states are a class of nonclassical states obtained by removing one or more number states from a coherent state. Phase sensitivity of an interferomete…
Phase matching in -barium borate crystals for spontaneous parametric down-conversion
Suman Karan, Shaurya Aarav, Homanga Bharadhwaj +5
Spontaneous parametric down-conversion (SPDC) is the most widely used process for generating entangled photon pairs. In SPDC, a pump photon interacts with a nonlinear optical cryst…
Atomic switch for control of heat transfer in coupled cavities
Nilakantha Meher, S. Sivakumar
Controlled heat transfer and thermal rectification in a system of two coupled cavities connected to thermal reservoirs are discussed. Embedding a dispersively interacting two-level…
Nonintegrability and quantum fluctuations in a quantum optical model
Nilakantha Meher, S. Sivakumar
Integrability in quantum theory has been defined in more than one ways. Recently, Braak suggested a new definition that a quantum system is integrable if the number of parameters r…
Number state filtered coherent state
Nilakantha Meher, S. Sivakumar
Number state filtering in coherent states leads to sub-Poissonian photon statistics. These states are more suitable for phase estimation when compared with the coherent states. Non…
Duality and quantum state engineering in cavity arrays
Nilakantha Meher, S. Sivakumar, Prasanta K. Panigrahi
A system of two coupled cavities with photons is shown to be dynamically equivalent to an array of coupled cavities containing one photon. Every transition in the two cav…
Localization and delocalization dynamics of photons in linearly coupled cavity arrays
Nilakantha Meher, S. Sivakumar
Localization and delocalization of two photons in an array of cavities are examined. Role of entanglement and relative phase of the initial state in the occurrence of localization…