Research PapersNo Access

The decoherence effect of qubit in 1D transverse Ising model

Bobin Li

Department of Physics, Lanzhou University of Technology, Lanzhou 730050, P. R. China

https://doi.org/10.1142/S0217732322502418Cited by:0 (Source: Crossref)

Abstract

With the development of lab technology, the low-order correlation function can no longer describe the main effect of decoherence in the quantum many-body system, so it is imperative to study the higher-order correlation function of the system. In this paper, the higher-order correlation function is discussed analytically in the 1D transverse Ising model, and it is searched when the third-order or higher correlation functions play a key role in the decoherence effect. Under the cases of strong coupling and long coherence time, it is indicated that the effect of high-order correlation functions cannot be ignored, and the approximation of the classical Markov process is limited. But the low-order correlation function can describe well in the case of weak coupling and short coherence time.

Keywords:

PACS: 03.65.Yz, 64.60.De, 82.20.Sb

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