确定性模型中的量子力学行为

Deterministic actions on stochastic ensembles of particles can replicate wavelike behaviour of quantum mechanics: does it matter?

The probabilistic interpretation of quantum mechanics has been a point of discussion since the earliest days of the theory. The development of quantum technologies transfer these discussions from philosophical interest to practical importance. We propose a synthesis of ideas appeared from the field's founders to modern contextual approaches. The concept is illustrated by a simple numerical experiment imitating photon interference in two beamsplitters. This example demonstrates that deterministic physical principles can replicate wavelike probabilistic effects when applied to stochastic ensembl…

Dissipation production in a closed two-level quantum system as a test of the obversibility of the dynamics

Irreversible behaviour is traditionally associated with open stochastic dynamical systems, but an asymmetry in the probabilistic specification of a closed deterministic system can similarly lead to a disparity between the likelihoods of a particular forward and corresponding backward behaviour starting from a specified time. Such a comparison is a test of a property denoted obversibility, which may be quantified in terms of dissipation production as a measure of irreversibility. We here discuss the procedure needed to evaluate dissipation production in a simple, deterministic two-level quantum…

How to Win Friends and Influence Functionals: Deducing Stochasticity From Deterministic Dynamics

The longstanding question of how stochastic behaviour arises from deterministic Hamiltonian dynamics is of great importance, and any truly holistic theory must be capable of describing this transition. In this review, we introduce the influence functional formalism in both the quantum and classical regimes. Using this technique, we demonstrate how irreversible behaviour arises generically from the reduced microscopic dynamics of a system-environment amalgam. The influence functional is then used to rigorously derive stochastic equations of motion from a microscopic Hamiltonian. In this method …

纯薛定谔动力学下的弛豫平衡

Relaxation into equilibrium under pure Schrödinger dynamics

我们考虑完全由状态矢量$|Ψ(t)>$和完全确定性薛定谔方程描述的二分量子系统。在弱约束条件下，没有任何人为引入的退相干或不可逆性，两个子系统中较小的子系统表现出热力学行为，如松弛到平衡，熵最大化和玻尔兹曼能量分布的出现。这种普遍的行为是纠缠的结果。

A charged quantum dot micropillar system for deterministic light matter interactions

Quantum dots (QDs) are semiconductor nanostructures in which a three dimensional potential trap produces an electronic quantum confinement, thus mimicking the behaviour of single atomic dipole-like transitions. However unlike atoms, QDs can be incorporated into solid state photonic devices such as cavities or waveguides that enhance the light-matter interaction. A near unit efficiency light-matter interaction is essential for deterministic, scalable quantum information (QI) devices. In this limit, a single photon input into the device will undergo a large rotation of the polarization of the li…

Quantum Mechanics in Terms of Realism

.We expound an alternative to the Copenhagen interpretation of the formalism of nonrelativistic quantum mechanics. The basic difference is that the new interpretation is formulated in the language of epistemological realism. The ψ function is no longer interpreted as a probability amplitude of the observed behaviour of elementary particles but as an objective physical field representing the particles themselves. The particles are thus extended objects whose extension varies in time according to the variation of ψ. They are considered as fundamental regions of space with some kind of nonlocalit…