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The search results highlight ongoing discussions and research into foundational aspects of quantum mechanics. A survey explores diverse opinions on interpreting quantum mechanics nearly a century after its inception, underscoring the field's continuing debates. Additionally, new theoretical proposals aim to explain quantum phenomena, such as entanglement and Bell correlations, through concepts like collider bias and boundary constraints, without requiring causality beyond lightcones. Furthermore, studies delve into decoherence as a boundary between classical and quantum field theory behaviors, and explore the Bures geometry in quantum systems to better understand their mathematical properties.
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arxiv.org
Another Survey of Foundational Attitudes Towards Quantum Mechanics

Although it has been almost 100 years since the beginnings of quantum mechanics, the discussions about its interpretation still do not cease. Therefore, a survey of opinions regarding this matter is of particular interest. This poll was conducted following an idea and using the methodology of Schlos…

quant-ph physics.hist-ph
arxiv.org
A Mechanism for Entanglement?

We propose that quantum entanglement is a special sort of selection artefact, explicable as a combination of (i) collider bias and (ii) a boundary constraint on the collider variable. We show that the proposal is valid for a special class of (`W-shaped') Bell experiments involving delayed-choice ent…

quant-ph physics.hist-ph
arxiv.org
W as the Edge of a Wedge: Bell Correlations via Constrained Colliders

In previous work with Ken Wharton, it was proposed that Bell correlations are a special sort of selection artefact, explained by a combination of (i) collider bias and (ii) a boundary constraint on the collider variable. This requires no direct causal influence outside lightcones, and may hence offe…

quant-ph physics.hist-ph
arxiv.org
The decoherence criterion

The decoherence mechanism signals the limits beyond which the system dynamics approaches the classical behavior. We show that in some cases decoherence may also signal the limits beyond which the system dynamics has to be described by quantum field theory, rather than by quantum mechanics.…

quant-ph cond-mat.stat-mech physics.ed-ph
arxiv.org
Bures geometry of the three-level quantum systems. II

For the eight-dimensional Riemannian manifold comprised by the three-level quantum systems endowed with the Bures metric, we numerically approximate the integrals over the manifold of several functions of the curvature and of its (anti-)self-dual parts. The motivation for pursuing this research is t…

math-ph math.DG physics.comp-ph quant-ph
arxiv.org
Improving Sensitivity of an Amplitude-Modulated Magneto-Optical Atomic Magnetometer using Squeezed Light

We experimentally demonstrate that a squeezed probe optical field can improve the sensitivity of the magnetic field measurements based on nonlinear magneto-optical rotation (NMOR) with an amplitude-modulated pump when compared to a coherent probe field under identical conditions. To realize an all-a…

quant-ph physics.atom-ph physics.optics
arxiv.org
Scattering of heavy charged particles on hydrogen atoms

The low energy scattering of heavy positively charged particles on hydrogen atoms (H) are investigated by solving the Faddeev equations in configuration space. A resonant value of the pH scattering length, $a=750\pm 5$ a.u., in the pp antisymmetric state was found. This large value indicates the exi…

quant-ph physics.atom-ph physics.chem-ph physics.comp-ph
arxiv.org
Quantum and Classic Brackets

We describe an $p$-mechanical (see funct-an/9405002 and quant-ph/9610016) brackets which generate quantum (commutator) and classic (Poisson) brackets in corresponding representations of the Heisenberg group. We \emph{do not} use any kind of semiclassic approximation or limiting procedures for $\hbar…

math-ph math.FA math.QA math.RT physics.class-ph