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https://doi.org/10.1088/0305-4470/27/19/016

has been cited by the following article:

• TITLE: Nonstandard Unitary Transformations of Quantum States

  AUTHORS: Gombojav O. Ariunbold

  KEYWORDS: Taylor Series, Unitary Transformation, Temporal Evolution, Displaced State, Coherent State, Squeezed State, Two-Mode Squeezed State, Holstein-Primakoff State

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.11 No.9, September 14, 2023

  ABSTRACT: In quantum optics, unitary transformations of arbitrary states are evaluated by using the Taylor series expansion. However, this traditional approach can become cumbersome for the transformations involving non-commuting operators. Addressing this issue, a nonstandard unitary transformation technique is highlighted here with new perspective. In a spirit of “quantum” series expansions, the transition probabilities between initial and final states, such as displaced, squeezed and other nonlinearly transformed coherent states are obtained both numerically and analytically. This paper concludes that, although this technique is novel, its implementations for more extended systems are needed.