论文标题

aharonov-bohm在相空间中的效应

Aharonov-Bohm effect in phase space

论文作者

Cembranos, Jose A. R., García-López, David, del Toro, Zoe G.

论文摘要

Aharonov-bohm效应是一种真正的量子效应,通常以带电粒子的波函数的可测量相移为特征,该粒子环绕着位于上述粒子无法访问的区域中的电磁场。但是,在大多数相空间描述中不可能进行此定义,因为它们是基于准稳定性分布的。在这项工作中,我们首次表征了量子力学两种不同形式主义的aharonov-bohm效应。其中之一是依靠规范的换向关系和Weyl变换的相空形式主义。在此框架中,目的是通过Quasiprobability Wigner函数获得量子系统的一致描述。另一个是Segal-Bargmann形式主义,我们通过数学上描述并通过创造和an灭操作员的通勤关系来描述并与量子力学联系。引入了两种形式主义后,我们研究了两种特定情况的aharonov-bohm效应:一种由非零电势确定,另一种由非零磁性矢量电位确定。随后,我们获得了对Aharonov-bohm效应的更一般描述,该效应涵盖了两个案例,并且我们被证明等于在配置空间中通常的量子力学形式主义中对此效果的众所周知的描述。最后,我们深入研究了Aharonov-bohm效应,采用密度操作员来描绘具有位置和动量不确定性的状态,通过在电势下Wigner功能的时间演化中的独特干扰模式来展示其表现,并强调这种现象的本质上量子性质。

The Aharonov-Bohm effect is a genuine quantum effect typically characterized by a measurable phase shift in the wave function for a charged particle that encircles an electromagnetic field located in a region inaccessible to the mentioned particle. However, this definition is not possible in the majority of the phase space descriptions since they are based on quasiprobability distributions. In this work, we characterize for the first time the Aharonov-Bohm effect within two different formalisms of quantum mechanics. One of them is the phase-space formalism relying on the canonical commutation relations and Weyl transform. In this framework, the aim is to obtain a consistent description of the quantum system by means of the quasiprobability Wigner function. The other one is the Segal-Bargmann formalism, which we mathematically describe and connect with quantum mechanics by means of the commutation relations of the creation and annihilation operators. After an introduction of both formalisms, we study the Aharonov-Bohm effect within them for two specific cases: One determined by a non-zero electric potential, and another determined by a non-zero magnetic vector potential. Subsequently, we obtain a more general description of the Aharonov-Bohm effect that encompasses the two previous cases and that we prove to be equivalent to the well-known description of this effect in the usual quantum mechanics formalism in configuration space. Finally, we delve into the Aharonov-Bohm effect, employing a density operator to depict states with positional and momentum uncertainty, showcasing its manifestation through distinctive interference patterns in the temporal evolution of Wigner functions under an electric potential, and emphasizing the intrinsically quantum nature of this phenomenon.

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