Models of Wave-function Collapse, Underlying Theories, and Experimental Tests

By Angelo Bassi, K. Lochan, Seema Satin, T. P. Singh, Hendrik Ulbricht. 2012

932 citations recorded by the source corpus.

We describe the state of the art in preparing, manipulating and detecting coherent molecular matter. We focus on experimental methods for handling the quantum motion of compound systems from diatomic molecules to clusters or biomolecules. Molecular quantum optics offers many challenges and innovative prospects: already the combination of two atoms into one molecule takes several well-established methods from atomic physics, such as for instance laser cooling, to their limits. The enormous internal complexity that arises when hundreds or thousands of atoms are bound in a single organic molecule, cluster or nanocrystal provides a richness that can only be tackled by combining methods from atomic physics, chemistry, cluster physics, nanotechnology and the life sciences. We review various molecular beam sources and their suitability for matter-wave experiments. We discuss numerous molecular detection schemes and give an overview over diffraction and interference experiments that have already been performed with molecules or clusters. Applications of de Broglie studies with composite systems range from fundamental tests of physics up to quantum-enhanced metrology in physical chemistry, biophysics and the surface sciences. Nanoparticle quantum optics is a growing field, which will intrigue researchers still for many years to come. This review can, therefore, only be a snapshot of a very dynamical process.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/6d76f6a59254fa862d0dba9c4ebb163a7531b3dd

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum superposition, entanglement, and state teleportation of a microorganism on an electromechanical oscillator (2015, background): “While many-worlds interpretations propose that there is no wave function collapse [5, 6], objective collapse theories [7–10] propose that the wave function collapse is an intrinsic event that happens spontaneously.”
Macroscopic quantum states: Measures, fragility, and implementations (2017, background): “Most prominently, collapse models (Bassi et al., 2013) including gravitationally induced collapse (Diósi, 1989; Penrose, 1996) or continuous spontaneous localization (Ghirardi et al., 1990, 1986; Gisin, 1989) have been suggested.”
Universal decoherence due to gravitational time dilation (2013, neutral): “Although an experiment to measure decoherence due to proper time is very challenging, the rapid developments in controlling large quantum systems [3, 27, 28] for quantum metrology and for testing wave function collapse models [16, 29] will inevitably come to the regime where the time-dilation-induce”
Search for New Physics with Atoms and Molecules (2017, methodology): “We will also exclude detailed consideration of quantum mechanics tests with AMO systems which have been recently reviewed as well (Aspelmeyer et al., 2014; Bassi et al., 2013; Hornberger et al., 2012).”
Is the Quantum State Real? An Extended Review of -ontology Theorems (2014, background): “There are a handful of fully worked out realist interpretations of quantum theory, including many-worlds [6–8], de Broglie–Bohm theory [9–12], spontaneous collapse theories [13, 14] and modal interpretations [15].”
Tabletop experiments for quantum gravity: a user’s manual (2018, background): “Work of this kind [137], motivated by the quantum measurement problem, almost always deals with non-relativistic QM, and assumes the usual QM structure of state vectors, Hilbert space, and projective quantum measurements.”
A Postquantum Theory of Classical Gravity? (2018, neutral): “While it is hoped that frameworks for string field theory could result in a background-independent approach, it is not clear whether this can be maintained.”