Non-classicality of photon added coherent and thermal radiations |
| |
Authors: | A R Usha Devi R Prabhu M S Uma |
| |
Institution: | (1) Department of Physics, Bangalore University, Bangalore, 560 056, India |
| |
Abstract: | Production and analysis of non-Gaussian radiation fields has evinced a lot of attention recently.
Simplest way of generating such non-Gaussians is through adding (subtracting) photons to
Gaussian fields.
Interestingly, when photons are added to classical Gaussian fields, the resulting states exhibit
non-classicality.
Two important classical Gaussian radiation fields are coherent and thermal states. Here, we
study the non-classical features of
such states when photons are added to them. Non-classicality of these states shows up in the
negativity of the
Wigner function. We also work out the entanglement potential, a recently proposed measure
of non-classicality for these states. Our analysis reveals that photon added coherent states are
non-classical for all seed beam intensities; their non-classicality increases with the addition
of more number of photons. Thermal state exhibits non-classicality at all temperatures, when a
photon is added; lower the temperature, higher is their non-classicality. |
| |
Keywords: | 42 50 Dv Nonclassical states of the electromagnetic field including entangled photon states quantum state engineering and measurements 03 65 Wj State reconstruction quantum tomography 03 67 Mn Entanglement production characterization and manipulation |
本文献已被 SpringerLink 等数据库收录! |
|