Enhancing nonclassical properties of quantum states of light using linear optics

Article Optics

Phase space nonclassicality and sub-Poissonianity of deformed photon-added nonlinear cat states algebraic and group theoretical approach

S. O. G. A. N. D. Torkzadeh-tabrizi et al.

Summary: In this Letter, four distinct classes of f-deformed photon-added nonlinear cat state are introduced. This is achieved by using a nonlinear coherent states approach, along with a particular class of Gilmore-Perelomov-type of SU(1,1) coherent state and a class of SU(2) coherent state. The role of photon addition and nonlinearity functions in the phase space structure and sub-Poissonianity of different nonlinear cat states is examined. The effect of photon addition enhances the nonclassicality and introduces a deformation in the Gaussian shape of the Wigner function.

OPTICS LETTERS (2023)

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Article Optics

Generation of nonclassical states of light via truncation of mixed states

E. P. Mattos et al.

Summary: Nonclassical states of light can be generated by truncating states in the Fock basis without the need for prior generation of Fock states. This method can be applied to mixed input states, resulting in truncated states with either maximum or minimum Fock numbers. The nonclassical properties of the generated states can be adjusted by changing the parameters of the quantum scissors.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS (2022)

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Article Optics

Coherence of quantum states after noiseless attenuation

S. U. Shringarpure et al.

Summary: We demonstrate that heralding techniques can achieve noiseless attenuation while preserving quantum interference effects in nonclassical states.

PHYSICAL REVIEW A (2022)

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Article Optics

Photon added cat state: phase space structure and statistics

Arman et al.

Summary: The phase space structure and statistics of the photon added cat state were studied, revealing that photon addition leads to a phase shift at the origin and can serve as an error syndrome detector. Furthermore, photon addition interchange the maxima and minima of sub-Planck tiles in the kitten state's phase space, leading to their orthogonality. Additionally, photon addition to the Yurke-Stoler state with Poissonian statistics results in a sub-Poissonian distribution that could be useful for quantum noise reduction.

OPTICS LETTERS (2021)

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Article Optics

Quantum state truncation using an optical parametric amplifier and a beam splitter

E. P. Mattos et al.

Summary: A new scheme of quantum state truncation, named quantum scissors, is proposed in this study, using the combined action of a nondegenerate optical parametric amplifier and a beam splitter. Unlike previous linear-optics-based quantum scissors devices, this scheme only requires readily available Gaussian states as inputs and can generate different types of truncated states displaying nonclassical properties.

PHYSICAL REVIEW A (2021)

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Article Optics