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Abstract
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In this paper, we introduce quasi-Bell states as a result of two-mode superposition of
two “Near” coherent states, , ⟩ , shifted in phase by and
2 , where the latter introduced
by Othman et al. as a new class of quantum states attached to the simple harmonic
oscillator which generated via a Mach–Zehnder interferometer. To gain insight
into useful attributes to quantum information theory, we present a general analysis of
non-classical properties such as photon counting probability, photon statistics, squeezing
effect and quantum polarization. We also derive the concurrence measure to quantify
entanglement of these states and look for conditions that provide information on
which these become maximally entangled. Comparing with some cases already discussed
in the literature, we find that the phase angle plays an important role in nonclassical
effects. We also get a connection between entanglement and the polarization
degree of the introduced states.
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