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<p>An exact analysis of the evolution of the density operator from an arbitrary initial state is presented for an anharmonic Morse potential. The evolution is decoherent due to a quantum environment modeled as an infinite set of bosonic excitations. The treatment clearly brings out the effect of anharmonicity on the decoherence time beyond the harmonic limit.</p> Graphical Abstract <p>An exact analysis of the evolution of the density operator from an arbitrary initial state is presented for an anharmonic Morse potential. The evolution is decoherent because of the presence of a quantum environment that is viewed as a collection of an infinite set of bosonic excitations. The treatment clearly brings out the effect of anharmonicity on the decoherence time beyond the harmonic limit.</p>

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Vibrational dephasing of a Morse oscillator

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Sushanta Dattagupta

摘要

An exact analysis of the evolution of the density operator from an arbitrary initial state is presented for an anharmonic Morse potential. The evolution is decoherent due to a quantum environment modeled as an infinite set of bosonic excitations. The treatment clearly brings out the effect of anharmonicity on the decoherence time beyond the harmonic limit.

Graphical Abstract

An exact analysis of the evolution of the density operator from an arbitrary initial state is presented for an anharmonic Morse potential. The evolution is decoherent because of the presence of a quantum environment that is viewed as a collection of an infinite set of bosonic excitations. The treatment clearly brings out the effect of anharmonicity on the decoherence time beyond the harmonic limit.