469 research outputs found
Mini-Proceedings of ECT Workshop "Strangeness in Nuclei"
This workshop brought together international experts in the research area of
strangeness in nuclei physics, working on theory as well as on experiments, to
discuss the present status, to develop new methods of analysis and to have the
opportunity for brainstorming towards future studies, going towards a deeper
understanding of the hot topics in the low-energy QCD in the strangeness
sector
Are collapse models testable with quantum oscillating systems? The case of neutrinos, kaons, chiral molecules
Collapse models provide a theoretical framework for understanding how
classical world emerges from quantum mechanics. Their dynamics preserves
(practically) quantum linearity for microscopic systems, while it becomes
strongly nonlinear when moving towards macroscopic scale. The conventional
approach to test collapse models is to create spatial superpositions of
mesoscopic systems and then examine the loss of interference, while
environmental noises are engineered carefully. Here we investigate a different
approach: We study systems that naturally oscillate --creating quantum
superpositions-- and thus represent a natural case-study for testing quantum
linearity: neutrinos, neutral mesons, and chiral molecules. We will show how
spontaneous collapses affect their oscillatory behavior, and will compare them
with environmental decoherence effects. We will show that, contrary to what
previously predicted, collapse models cannot be tested with neutrinos. The
effect is stronger for neutral mesons, but still beyond experimental reach.
Instead, chiral molecules can offer promising candidates for testing collapse
models.Comment: accepted by NATURE Scientific Reports, 12 pages, 1 figures, 2 table
Are Collapse Models Testable via Flavor Oscillations?
Collapse models predict the spontaneous collapse of the wave function, in
order to avoid the emergence of macroscopic superpositions. In their
mass-dependent formulation they claim that the collapse of any system's wave
function depends on its mass. Neutral K, D, B mesons are oscillating systems
that are given by Nature as superposition of different mass eigenstates. Thus
they are unique and interesting systems to look at, for analyzing the
experimental implications of such models, so far in agreement with all known
experiments. In this paper we derive - for the single mesons and bipartite
entangled mesons - the effect of the mass-proportional CSL collapse model on
the dynamics on neutral mesons, including the relativistic effects. We compare
the theoretical prediction with experimental data from different accelerator
facilities.Comment: 20 pages, RevTe
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