C. M. Chandrashekar
YOU?
Author Swipe
View article: Deterministic quantum teleportation of a path-encoded state using entangled photons
Deterministic quantum teleportation of a path-encoded state using entangled photons Open
Quantum teleportation enables a way to transmit an arbitrary qubit state from one location to another. The standard scheme for teleportation in optical setups involves three photons: an entangled photon pair and a photon carrying the quant…
View article: Photonic Simulation of Beyond-Quantum Nonlocal Correlations (e.g. Popescu-Rohrlich Box) with Non-Signaling Quantum Resources
Photonic Simulation of Beyond-Quantum Nonlocal Correlations (e.g. Popescu-Rohrlich Box) with Non-Signaling Quantum Resources Open
Bell nonlocality exemplifies the most profound departure of quantum theory from classical realism. Yet, the extent of nonlocality in quantum theory is intrinsically bounded, falling short of the correlations permitted by the relativistic c…
View article: Accelerated first detection in discrete-time quantum walks using sharp restarts
Accelerated first detection in discrete-time quantum walks using sharp restarts Open
Restart is a common strategy observed in nature that accelerates first-passage processes, and has been extensively studied using classical random walks. In the quantum regime, restart in continuous-time quantum walks (CTQWs) has been shown…
View article: Accelerated first detection in discrete-time quantum walks using sharp restarts
Accelerated first detection in discrete-time quantum walks using sharp restarts Open
Restart is a common strategy observed in nature that accelerates first-passage processes and has been extensively studied using classical random walks. In the quantum regime, restart in continuous-time quantum walks (CTQWs) has been shown …
View article: Beamsplitter-free, high bit-rate, quantum random number generator based on temporal and spatial correlations of heralded single-photons
Beamsplitter-free, high bit-rate, quantum random number generator based on temporal and spatial correlations of heralded single-photons Open
The spontaneous parametric down-conversion (SPDC), an inherently random quantum process, produces a non-deterministic photon-pair with strong temporal and spatial correlations owing to both energy and momentum conservation. Therefore, the …
View article: Quantum illumination using polarization-entangled photon pairs for enhanced object detection
Quantum illumination using polarization-entangled photon pairs for enhanced object detection Open
Entangled light sources for illuminating objects offer advantages over conventional illumination methods by enhancing the detection sensitivity of reflecting objects. The core of the quantum advantage lies in effectively exploiting quantum…
View article: HEALTHCARE DATA ANALYSIS USING CAPSULE NETWORKS
HEALTHCARE DATA ANALYSIS USING CAPSULE NETWORKS Open
In the realm of healthcare data analysis, capturing complex relationships within data, particularly in unstructured formats like text, presents a significant challenge. Traditional deep learning models, such as Convolutional Neural Network…
View article: COMPETITIVE ENSEMBLE LEARNING FOR HEALTHCARE DATA ANALYSIS
COMPETITIVE ENSEMBLE LEARNING FOR HEALTHCARE DATA ANALYSIS Open
In the rapidly evolving field of healthcare, the effective analysis of structured and unstructured data is crucial for enhancing disease diagnosis, patient outcomes, and overall healthcare management. This paper presents a novel approach, …
View article: Quantum walk-based protocol for secure communication between any two directly connected nodes on a network
Quantum walk-based protocol for secure communication between any two directly connected nodes on a network Open
The utilization of quantum entanglement as a cryptographic resource has superseded conventional approaches to secure communication. Security and fidelity of intranetwork communication between quantum devices is the backbone of a quantum ne…
View article: Reduced dynamics in quasi-Hermitian systems
Reduced dynamics in quasi-Hermitian systems Open
Evolutions under non-Hermitian Hamiltonians with unbroken $\mathcal{PT}$ symmetry can be considered unitary under appropriate choices of inner products, facilitated by the so-called metric operator. While it is understood that the choice o…
View article: Quantum illumination using polarization-path entangled single photons for low reflectivity object detection in a noisy background
Quantum illumination using polarization-path entangled single photons for low reflectivity object detection in a noisy background Open
Detecting object with low reflectivity embedded within a noisy background is a challenging task. Quantum correlations between pairs of quantum states of light, though are highly sensitive to background noise and losses, offer advantages ov…
View article: Open system approach to Neutrino oscillations in a quantum walk framework
Open system approach to Neutrino oscillations in a quantum walk framework Open
Quantum simulation provides a computationally-feasible approach to model and study many problems in chemistry, condensed-matter physics, or high-energy physics where quantum phenomenon define the systems behaviour. In high-energy physics, …
View article: Quantum illumination using polarization-path entangled single photons for low reflectivity object detection in noisy background
Quantum illumination using polarization-path entangled single photons for low reflectivity object detection in noisy background Open
Detecting object with low reflectivity embedded within a noisy background is a challenging task. Quantum correlations between pairs of quantum states of light, though are highly sensitive to background noise and losses, offer advantages ov…
View article: Quantum direct communication protocol using recurrence in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>k</mml:mi></mml:math>-cycle quantum walks
Quantum direct communication protocol using recurrence in -cycle quantum walks Open
The ability of quantum walks to evolve in a superposition of distinct quantum states has been used as a resource in quantum communication protocols. Under certain settings, the k-cycle discrete-time quantum walks (DTQW) are known to recur …
View article: Non-Markovianity between Site Pairs in FMO Complex Using Discrete-Time Quantum Jump Model
Non-Markovianity between Site Pairs in FMO Complex Using Discrete-Time Quantum Jump Model Open
The Fenna-Mathews-Olson (FMO) complex present in green sulfur bacteria is known to mediate the transfer of excitation energy between light-harvesting chlorosomes and membrane-embedded bacterial reaction centers. Due to the high efficiency …
View article: Quantum walk-based protocol for secure communication between any two directly connected nodes on a network
Quantum walk-based protocol for secure communication between any two directly connected nodes on a network Open
The utilization of quantum entanglement as a cryptographic resource has superseded conventional approaches to secure communication. Security and fidelity of intranetwork communication between quantum devices is the backbone of a quantum ne…
View article: Noise resilience in path-polarization hyperentangled probe states
Noise resilience in path-polarization hyperentangled probe states Open
Most quantum systems that are used for generating entanglement and for practical applications are not isolated from the environment, and are hence susceptible to noise. Entanglement in more than one degree of freedom between two systems, k…
View article: Multi-bit quantum random number generator from path-entangled single photons
Multi-bit quantum random number generator from path-entangled single photons Open
Measurement outcomes on quantum systems exhibit inherent randomness and are fundamentally nondeterministic. This has enabled quantum physics to set new standards for the generation of true randomness with significant applications in the fi…
View article: Polarization-path-frequency entanglement using interferometry and frequency shifters
Polarization-path-frequency entanglement using interferometry and frequency shifters Open
Higher dimensional Hilbert space along with ability to control multiple degrees of freedom of photon and entangle them has enabled new quantum protocols for various quantum information processing applications. Here, we propose a scheme to …
View article: Generation of hyperentangled states and two-dimensional quantum walks using <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>J</mml:mi></mml:math> or <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>q</mml:mi></mml:math> plates and polarization beam splitters
Generation of hyperentangled states and two-dimensional quantum walks using or plates and polarization beam splitters Open
A single photon can be made to entangle simultaneously in its different internal degrees of freedom (DoF) - polarization, orbital angular momentum (OAM), and frequency - as well as in its external DoF - path. Such entanglement in multiple …
View article: Bell-inequality in path-entangled single photon and purity of single photon state
Bell-inequality in path-entangled single photon and purity of single photon state Open
Different degrees of freedom of single photons have been entangled and are used as a resource for various quantum technology applications. We present a simple scheme to perform Bell's test and show the violation of CHSH inequality in a pat…
View article: Quantum circuits for the realization of equivalent forms of one-dimensional discrete-time quantum walks on near-term quantum hardware
Quantum circuits for the realization of equivalent forms of one-dimensional discrete-time quantum walks on near-term quantum hardware Open
Quantum walks are a promising framework for developing quantum algorithms and quantum simulations. They represent an important test case for the application of quantum computers. Here we present different forms of discrete-time quantum wal…
View article: Quantum walks in polycyclic aromatic hydrocarbons
Quantum walks in polycyclic aromatic hydrocarbons Open
Aromaticity is a well-known phenomenon in both physics and chemistry, and is responsible for many unique chemical and physical properties of aromatic molecules. The primary feature contributing to the stability of polycyclic aromatic hydro…
View article: Generation of hyperentangled states and two-dimensional quantum walks using $J$- ($q$)- plates and polarization beamsplitters
Generation of hyperentangled states and two-dimensional quantum walks using $J$- ($q$)- plates and polarization beamsplitters Open
A single photon can be made to entangle simultaneously in its different internal degrees of freedom (DoF) -- polarization, orbital angular momentum (OAM), and frequency -- as well as in its external DoF -- path. Such entanglement in multip…
View article: Non-Hermitian quantum walks and non-Markovianity: the coin-position interaction
Non-Hermitian quantum walks and non-Markovianity: the coin-position interaction Open
A $\mathcal{PT}$-symmetric, non-Hermitian Hamiltonian in the $\mathcal{PT}$-unbroken regime can lead to unitary dynamics under the appropriate choice of the Hilbert space. The Hilbert space is determined by a Hamiltonian-compatible inner p…
View article: Hyperentanglement-enhanced quantum illumination
Hyperentanglement-enhanced quantum illumination Open
In quantum illumination, the signal mode of light, entangled with an idler mode, is dispatched towards a suspected object bathed in thermal noise and the returning mode, along with the stored idler mode, is measured to determine the presen…
View article: Computational power of single qubit discrete-time quantum walk
Computational power of single qubit discrete-time quantum walk Open
Quantum walk has been regarded as a primitive to universal quantum computation. By using the operations required to describe the single particle discrete-time quantum walk on a position space we demonstrate the realization of the universal…
View article: Non-Markovian channel from the reduced dynamics of a coin in a quantum walk
Non-Markovian channel from the reduced dynamics of a coin in a quantum walk Open
The quantum channels with memory, known as non-Markovian channels, are of\ncrucial importance for a realistic description of a variety of physical\nsystems, and pave ways for new methods of decoherence control by manipulating\nthe properti…