145 citations · 346 across the 10 of their papers we have counts for
10 papers
Fundamental Sensitivity Bounds for Quantum Enhanced Optical Resonance Sensors Based on Transmission and Phase Estimation
Mohammadjavad Dowran, Timothy S. Woodworth, Ashok Kumar +1
Quantum states of light can enable sensing configurations with sensitivities beyond the shot-noise limit (SNL). In order to better take advantage of available quantum resources and…
Einstein-Podolsky-Rosen Paradox with Position-Momentum Entangled Macroscopic Twin Beams
Ashok Kumar, Gaurav Nirala, Alberto M. Marino
Spatial entanglement is at the heart of quantum enhanced imaging applications and high-dimensional quantum information protocols. In particular, for imaging and sensing application…
Spatial squeezing in bright twin beams generated with four-wave mixing: constraints on characterization with an EMCCD camera
Ashok Kumar, Alberto M. Marino
The observation of spatial quantum noise reduction, or spatial squeezing, with a large number of photons can lead to a significant advantage in quantum imaging and quantum metrolog…
Quantum-Enhanced Plasmonic Sensing
Mohammadjavad Dowran, Ashok Kumar, Benjamin J. Lawrie +2
Quantum resources can enhance the sensitivity of a device beyond the classical shot noise limit and, as a result, revolutionize the field of metrology through the development of qu…
Comparison of coherence area measurement techniques for bright entangled twin beams
Ashok Kumar, Hayden Nunley, Alberto M. Marino
Quantum states of light with multiple spatial modes are fundamental for quantum imaging and parallel quantum information processing. Thus, their characterization, which can be achi…
Observation of Spatial Quantum Correlations in the Macroscopic Regime
Ashok Kumar, Hayden Nunley, A. M. Marino
Spatial quantum correlations in the transverse degree of freedom promise to enhance optical resolution, image detection, and quantum communications through parallel quantum informa…
Spatial distribution of Spontaneous Parametric Down-Converted Photons for higher order Optical Vortices
Shashi Prabhakar, Salla Gangi Reddy, A Aadhi +4
We make a source of entangled photons (SEP) using spontaneous parametric down-conversion (SPDC) in a non-linear crystal and study the spatial distribution of photon pairs obtained…
Higher order optical vortices and formation of speckles
Salla Gangi Reddy, Shashi Prabhakar, Ashok Kumar +2
We have experimentally generated higher order optical vortices and scattered them through a ground glass plate that results in speckle formation. Intensity autocorrelation measurem…
Experimental generation of ring-shaped beams with random sources
Salla Gangi Reddy, Ashok Kumar, Shashi Prabhakar +1
We have experimentally reproduced ring shaped beams from the scattered Laguerre-Gaussian and Bessel-Gaussian beams. A rotating ground glass plate is used as a scattering medium and…
Measuring Mueller matrix of an arbitrary optical element with a fixed set of polarization optics
Salla Gangi Reddy, Shashi Prabhakar, A. Aadhi +4
We have described a novel way to determine the Mueller matrix of any optical element by using projection method. For this purpose, we have used two universal SU(2) gadgets for pola…