Non-Gaussian and Gaussian Entanglement in Coupled Leaky Waveguides (2009)
Rai, Amit, Das, Sumanta, Agarwal, G. S.
We investigate the viability of coupled waveguides as basic units of quantum circuits. In particular, we study the dynamics of entanglement for the single photon state, and single mode squeezed...
Decoherence effects in interacting qubits under the influence of various environments (2009)
We study competition between the dissipative and coherent effects in the entanglement dynamics of two qubits. The coherent interactions are needed for designing logic gate operations with systems...
Collapse and Revival of Entanglement in Interacting Qubits in Contact with the Environment (2009)
Interaction among the qubits are basis to many logic operations. We report how such interactions lead to collapse and revival of entanglement between two qubits subject to environmental...
Nonclassical Correlation of Polarization Entangled Photons in a Biexciton-Exciton Cascade (2008)
We develop a theoretical model to study the Intensity-Intensity correlation of polarization entangled photons emitted in a biexciton-exciton cascade. We calculate the degree of correlation and show...
Quantum Interferences in Cooperative Dicke Emission from Spatial Variation of Laser Phase (2008)
Das, Sumanta, Agarwal, G. S., Scully, Marlan O.
We report generation of a new quantum interference effect in spontaneous emission from a resonantly driven system of two identical two-level atoms due to the spatial variation of the laser phase at...
We report a fundamental effect of the electromagnetic field induced modification of the branching ratios for emission into several final states. The modifications are especially significant if the...
Photon-Photon Correlations as a Probe of Vacuum Induced Coherence Effects (2007)
We present new experimental implications of the effects of vacuum induced coherence on the photon -photon correlation in the pi-polarized fluorescence in j = 1/2 to j = 1/2 transition. These effects...