5 papers
Phase-enhanced nonreciprocal photon-phonon conversion via coupled optomechanical cavities
Divya Mishra, Parvendra Kumar
Nonreciprocity, characterized by direction-dependent signal propagation, is fundamental to technologies such as isolators, signal routing, and precision sensing. This letter theore…
Quantum Key Distribution with a Negatively Charged Quantum Dot Single-Photon Source
Parvendra Kumar
Various quantum key distribution (QKD) protocols require bright single-photon sources with a very low probability of multiphoton emission. In this work, we investigate single-photo…
Polarization entanglement and qubit error rate dependence on the exciton-phonon coupling in self-assembled quantum dots
Urmimala Dewan, Parvendra Kumar, Amarendra K. Sarma
Polarization-entangled photons are key resources for a wide range of protocols in quantum computation and quantum key distribution. Achieving a near-unity degree of polarization en…
Effects of phase-gradient on the nonadiabatic dynamics and photon-phonon conversion in one-dimensional array of optomechanical cavities
Divya Mishra, Parvendra Kumar
Manipulation of photonic and phononic coupling in the coupled cavities plays a crucial role in the development of nonreciprocal devices and photon-phonon conversion. Here, we theor…
Effects of cavity-mediated processes on the polarization entanglement of photon pairs emitted from quantum dots
Mukesh Kumar Samal, Divya Mishra, Parvendra Kumar
Semiconductor quantum dots are among the best sources of on-demand entangled photon pairs. The degree of entanglement, however, is generally limited by the fine structure splitting…