Variance and Mandel’s Q parameter in para-squeezed states with squeezed parameter in a single mode electromagnetic field

Priyanka, .; Lal, Jawahar; Gill, Savita

doi:10.1007/s11082-021-03410-z

Cited by 2 publications

(1 citation statement)

References 23 publications

(25 reference statements)

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“…If Q i < 0, the state of the mode a i has sub-Poissonian statistics. This non-classical behavior is still widely studied and used, for example, for source verification [52][53][54], in particular, using the time-dependent version of this parameter. Clearly, the extended RSF formalism keeps information on photon statistics and its time dependence in the operators ρ(t), ρ4 (t) and so the Mandel Q parameter can be found as:…”

Section: Mandel-q Parameter and Two Mode Entanglementmentioning

confidence: 99%

Open dynamics of entanglement in mesoscopic bosonic systems

Schlichtholz,

Rudnicki

2024

New J. Phys.

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A key issue in Quantum Information is finding an adequate description of mesoscopic systems that is simpler than full quantum formalism yet retains crucial information about non-classical phenomena like entanglement. In particular, the study of fully bosonic systems undergoing open evolution is of great importance for the advancement of photonic quantum computing and communication. In this paper, we propose a mesoscopic description of such systems based on boson number correlations. This description allows for tracking Markovian open evolution of entanglement of both non-Gaussian and Gaussian states and their sub-Poissonian statistics. It can be viewed as a generalization of the reduced state of the field formalism [Entropy 2019, 21(7), 705], which by itself does not contain information about entanglement. As our approach adopts the structure of the description of two particles in terms of first quantization, it allows for broad intuitive usage of known tools. Using the proposed formalism, we show the robustness of entanglement against low-temperature damping for four-mode bright squeezed vacuum state and beam-splitted single photon. We also present a generalization of the Mandel Q parameter. Building upon this, we show that the entanglement of the state obtained by beam splitting of a single occupied mode is inherited from sub-Poissonian statistics of the input state.

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Section: Mandel-q Parameter and Two Mode Entanglementmentioning

confidence: 99%