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Chapter
Experimental Decoherence in Molecule Interferometry
Complex molecules are intriguing objects at the interface between quantum and classical phenomena. Compared to the electrons, neutrons, or atoms studied in earlier matter-wave experiments, they feature a much ...
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Chapter
Otto Stern’s Legacy in Quantum Optics: Matter Waves and Deflectometry
Otto Stern became famous for molecular beam physics, matter-wave research and the discovery of the electron spin, with his work guiding several generations of physicists and chemists. Here we discuss how his l...
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Chapter
Interferometric Tests of Wave-Function Collapse
Among the various commonly proposed interpretations of quantum mechanics, models of wave function collapse are unique in being empirically falsifiable. Here we review experiments which place bounds on the para...
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Article
Quantum superposition of molecules beyond 25 kDa
Matter-wave interference experiments provide a direct confirmation of the quantum superposition principle, a hallmark of quantum theory, and thereby constrain possible modifications to quantum mechanics1. By incr...
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Article
Open AccessSilicon microcavity arrays with open access and a finesse of half a million
Optical resonators are essential for fundamental science, applications in sensing and metrology, particle cooling, and quantum information processing. Cavities can significantly enhance interactions between li...
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Article
Open AccessPushing the mass limit for intact launch and photoionization of large neutral biopolymers
Since their first discovery by Louis Dunoyer and Otto Stern, molecular beams have conquered research and technology. However, it has remained an outstanding challenge to isolate and photoionize beams of massiv...
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Chapter
New Avenues for Matter-Wave-Enhanced Spectroscopy
We present matter-wave interferometry as a tool to advance spectroscopy for a wide class of nanoparticles, clusters and molecules. The high sensitivity of de Broglie interference fringes to external perturbati...
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Article
Open AccessOptically driven ultra-stable nanomechanical rotor
Nanomechanical devices have attracted the interest of a growing interdisciplinary research community, since they can be used as highly sensitive transducers for various physical quantities. Exquisite control o...
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Article
Open AccessNew avenues for matter-wave-enhanced spectroscopy
We present matter-wave interferometry as a tool to advance spectroscopy for a wide class of nanoparticles, clusters and molecules. The high sensitivity of de Broglie interference fringes to external perturbati...
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Article
Quantum technology: from research to application
The term quantum physics refers to the phenomena and characteristics of atomic and subatomic systems which cannot be explained by classical physics. Quantum physics has had a long tradition in Germany, going b...
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Article
An atomically thin matter-wave beamsplitter
Atomically thin gratings, fabricated in single-layer graphene, can act as nanomechanical diffraction elements for high-contrast quantum interference of phthalocyanine molecules.
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Article
Open AccessSimulated Interactive Research Experiments as Educational Tools for Advanced Science
Experimental research has become complex and thus a challenge to science education. Only very few students can typically be trained on advanced scientific equipment. It is therefore important to find new tools...
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Article
Testing the limits of quantum mechanical superpositions
Quantum physics has intrigued scientists and philosophers alike, because it challenges our notions of reality and locality — concepts that we have grown to rely on in our macroscopic world. It is an intriguing...
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Article
Open AccessCavity cooling of free silicon nanoparticles in high vacuum
Laser cooling has given a boost to atomic physics throughout the last 30 years, as it allows one to prepare atoms in motional states, which can only be described by quantum mechanics. Most methods rely, howeve...
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Article
Open AccessSingle-Photon Ionization of Organic Molecules Beyond 10 kDa
The volatilization and soft ionization of complex neutral macromolecules at low energies has remained an outstanding challenge for several decades [1]. Most volatilization techniques in mass spectrometry produce ...
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Article
A universal matter-wave interferometer with optical ionization gratings in the time domain
A matter-wave interferometer is ‘universal’ if it can be applied to any atom or molecule irrespective of its internal state. This removes the need to prepare a spatially coherent incident beam. Such a system i...
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Article
Erratum: Real-time single-molecule imaging of quantum interference
Nature Nanotechnology 7, 297–300 (2012); published online 25 March 2012; corrected after print 25 July 2012. In the version of this Letter originally published, in Fig. 1c, the two white arrows were incorrectl...
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Article
Real-time single-molecule imaging of quantum interference
The observation of interference patterns in double-slit experiments with massive particles is generally regarded as the ultimate demonstration of the quantum nature of these objects. Such matter–wave interfere...
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Chapter and Conference Paper
Calculating a Distributional Similarity Kernel using the Nyström Extension
The analysis of distributional similarities induced by word co-occurrences is an established tool for extracting semantically related words from a large text corpus. Based on the co-occurrence matrix C the basic ...
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Article
New Prospects for de Broglie Interferometry
We consider various effects that are encountered in matter wave interference experiments with massive nanoparticles. The text-book example of far-field interference at a grating is compared with diffraction into ...
