Closed-System Solution of the 1D Atom from Collision Model

Entropy

Maria Maffei¹  Alexia Auffèves¹  Patrice A. Camati¹ 

[1] CNRS, Grenoble INP, Institut Néel, Université Grenoble Alpes, 38000 Grenoble, France;

关键词: collision model;    quantum non-Markovian dynamics;    input–output formalism;    quantum optics;    open quantum systems;    repeated interaction model;   

DOI  :  10.3390/e24020151

来源: DOAJ

【 摘 要 】

Obtaining the total wavefunction evolution of interacting quantum systems provides access to important properties, such as entanglement, shedding light on fundamental aspects, e.g., quantum energetics and thermodynamics, and guiding towards possible application in the fields of quantum computation and communication. We consider a two-level atom (qubit) coupled to the continuum of travelling modes of a field confined in a one-dimensional chiral waveguide. Originally, we treated the light-matter ensemble as a closed, isolated system. We solve its dynamics using a collision model where individual temporal modes of the field locally interact with the qubit in a sequential fashion. This approach allows us to obtain the total wavefunction of the qubit-field system, at any time, when the field starts in a coherent or a single-photon state. Our method is general and can be applied to other initial field states.

【 授权许可】

Unknown