26 citations · 142 across the 11 of their papers we have counts for
11 papers
Continuous variable quantum teleportation in a dissipative environment: Comparison of non-Gaussian operations before and after noisy channel
Chandan Kumar, Mohak Sharma, Shikhar Arora
We explore the relative advantages in continuous-variable quantum teleportation when non-Gaussian operations, namely, photon subtraction, addition, and catalysis, are performed bef…
Parity-detection-based Mach-Zehnder interferometry with coherent and non-Gaussian squeezed vacuum states as inputs
Chandan Kumar, Rishabh, Mohak Sharma +1
We theoretically explore the advantages rendered by non-Gaussian operations in phase estimation using a parity-detection-based Mach-Zehnder interferometer, with one input being a c…
Enhanced phase estimation in parity detection based Mach-Zehnder interferometer using non-Gaussian two-mode squeezed thermal input state
Chandan Kumar, Rishabh, Shikhar Arora
While the quantum metrological advantages of performing non-Gaussian operations on two-mode squeezed vacuum (TMSV) states have been extensively explored, similar studies in the con…
Consideration of success probability and performance optimization in non-Gaussian continuous variable quantum teleportation
Chandan Kumar, Shikhar Arora
Non-Gaussian operations have been shown to enhance the fidelity of continuous variable quantum teleportation. However, a disadvantage of these non-Gaussian operations is that they…
Realistic non-Gaussian operations scheme in parity detection based Mach-Zehnder quantum interferometry
Chandan Kumar, Rishabh, Shikhar Arora
We theoretically analyze phase sensitivity using parity detection based Mach Zehnder interferometer (MZI) with the input states generated by performing non-Gaussian operations, viz…
Evolution of two-mode quantum states under a dissipative environment: which quantum resource survives better, squeezing or entanglement?
Rishabh, Chandan Kumar, Geetu Narang +1
We explore the relative robustness of squeezing and entanglement (which are quantum resources interconvertible via passive optics) for two-mode Gaussian states under different diss…
Multiphoton Bell-type inequality: a tool to unearth nonlocality of continuous variable quantum optical systems
Chandan Kumar, Gaurav Saxena, Arvind
We consider a multiphoton Bell-type inequality to study nonlocality in four-mode continuous variable systems, which goes beyond two-photon states and can be applied to mixed as wel…
Optimal characterization of Gaussian channels using photon-number-resolving detectors
Chandan Kumar, Ritabrata Sengupta, Arvind
We present optimal schemes, based on photon number measurements, for Gaussian state tomography and for Gaussian process tomography. An -mode Gaussian state is completely specifi…
Coherence assisted non-Gaussian measurement device independent quantum key distribution
Chandan Kumar, Jaskaran Singh, Soumyakanti Bose +1
Non-Gaussian operations on two mode squeezed vacuum states (TMSV) in continuous variable measurement device independent quantum key distribution (CV-MDI-QKD) protocols have been sh…
Frequentist-approach inspired theory of quantum random phenomena predicts signaling
C. S. Sudheer Kumar, Anup Biswas, Aditi Sen De +1
Different ensembles of the same density matrix are indistinguishable within the modern Kolmogorov probability measure theory of quantum random phenomena. We find that changing the…
On-demand quantum key distribution using superconducting rings with a mesoscopic Josephson junction
Chandan Kumar, Jaskaran Singh, Arvind
We present a quantum key distribution (QKD) protocol based on long lived coherent states prepared on superconducting rings with a mesoscopic Josephson junction (dc-SQUIDs). This en…