100 citations · 606 across the 22 of their papers we have counts for
6 papers · 1 filter
Coherence-Driven Topological Transition in Quantum Metamaterials
Pankaj K. Jha, Michael Mrejen, Jeongmin Kim +4
We introduce and theoretically demonstrate a quantum metamaterial made of dense ultracold neutral atoms loaded into an inherently defect-free artificial crystal of light, immune to…
Ultra-short strong excitation of two-level systems
Pankaj K. Jha, Hichem Eleuch, Fabio Grazioso
We present a model describing the use of ultra-short strong pulses to control the population of the excited level of a two-level quantum system. In particular, we study an off-reso…
Quantum-Coherence-Enhanced Surface Plasmon Amplification by Stimulated Emission of Radiation
Konstantin E. Dorfman, Pankaj K. Jha, Dmitri V. Voronine +3
We investigate surface plasmon amplification in a silver nanoparticle coupled to an externally driven three-level gain medium, and show that quantum coherence significantly enhance…
Phase dependent interference effects on atomic excitation
Pankaj K. Jha, Hebin Li, Vladimir A. Sautenkov +2
We present an experimental and theoretical study of phase-dependent interference effects in multi-photon excitation under bichromatic radio-frequency (rf) field. Using an intense r…
Analytical solutions for a two-level system driven by a class of chirped pulses
Pankaj K. Jha, Yuri V. Rostovtsev
We present analytical solutions for the problem of a two-level atom driven by a class of chirped pulses. The solutions are given in terms of Heun functions. Using appropriate chirp…
Coherent Excitation of a Two-Level Atom driven by a far off-resonant Classical Field: Analytical Solutions
Pankaj K. Jha, Yuri V. Rostovtsev
We present an analytical treatment of coherent excitation of a Two-Level Atom driven by a far-off resonant classical field. A class of pulse envelope is obtained for which this pro…