TY - JOUR A1 - Mairhofer, Lukas A1 - Passon, Oliver T1 - Reconsidering the Relation Between “Matter Wave Interference” and “Wave–Particle Duality” JF - Foundations of Physics N2 - Interference of more and more massive objects provides a spectacular confirmation of quantum theory. It is usually regarded as support for “wave–particle duality” and in an extension of this duality even as support for “complementarity”. We first give an outline of the historical development of these notions. Already here it becomes evident that they are hard to define rigorously, i.e. have mainly a heuristic function. Then we discuss recent interference experiments of large and complex molecules which seem to support this heuristic function of “duality”. However, we show that in these experiments the diffraction of a delocalized center-of-mass wave function depends on the interaction of the localized structure of the molecule with the diffraction element. Thus, the molecules display “dual features” at the same time, which contradicts the usual understanding of wave–particle duality. We conclude that the notion of “wave–particle duality” deserves no place in modern quantum physics. KW - Quantenmechanik KW - Welle-Teilchen-Dualismus KW - Interferenz Y1 - IS - 52/32 PB - Springer ER - TY - GEN A1 - Mairhofer, Lukas A1 - Maiwöger, Mira T1 - Entanglement: From Philosophy to Quantum Information - and back Experiments on Bell-inequalties - threat to the Theory of Relativity? KW - Quantenphysik KW - Bell-Ungleichungen KW - Verschränkung Y1 - ER - TY - GEN A1 - Mairhofer, Lukas T1 - From foundational research to application - Training Quantum Engineers KW - Didaktik KW - Quantentechnologien KW - Quantencomputer KW - Quantenkryptographie Y1 - ER - TY - GEN A1 - Mairhofer, Lukas T1 - Dying Experiments KW - Experimentalsysteme KW - Quantenphysik KW - Science and Technology Y1 - ER - TY - JOUR A1 - Kialka, Filip A1 - Stickler, Benjamin A1 - Hornberger, Klaus A1 - Fein, Yaakov A1 - Geyer, Philipp A1 - Mairhofer, Lukas A1 - Gerlich, Stefan A1 - Arndt, Markus T1 - Concepts for long-baseline, high-mass matter-wave interferometry JF - Physica Scripta N2 - Designing experiments which delocalize ever more complex and more massive particles requires a quantitative assessment of new interferometer configurations. Here, we introduce a figure of merit which quantifies the difference between a genuine quantum interference pattern and a classical shadow and use it to compare a number of near-field interferometer schemes. This allows us to identify the most promising setups for future tests of the quantum superposition principle, and to discuss the perspectives of interferometry with complex molecules and clusters. KW - Matter wave optics KW - Quantum optics in phase space KW - Meteorology Y1 - IS - 94, 2019 ER - TY - JOUR A1 - Schätti, Jonas A1 - Köhler, Valentin A1 - Mayor, Marcel A1 - Fein, Yaakov A1 - Geyer, Philipp A1 - Mairhofer, Lukas A1 - Gerlich, Stefan A1 - Arndt, Markus T1 - Matter-wave interference and deflection of tripeptides decorated with fluorinated alkyl chains JF - Journal of Mass Spectrometry KW - interference KW - quantum KW - meteorology Y1 - IS - Vol 55, issue 6 ER - TY - JOUR A1 - Fein, Yaakov A1 - Shayeghi, Armin A1 - Mairhofer, Lukas A1 - Kialka, Filip A1 - Rieser, Philipp A1 - Geyer, Philipp A1 - Gerlich, Stefan A1 - Arndt, Markus T1 - Quantum-Assisted Measurement of Atomic Diamagnetism JF - Physical Review KW - diamagnetism KW - quantum KW - meteorology Y1 - IS - Volume 10, Issue 1 ER - TY - JOUR A1 - Mairhofer, Lukas A1 - Eibenberger, Sandra A1 - Shayeghi, Armin A1 - Arndt, Markus T1 - A quantum ruler for magnetic deflectometry JF - Entropy KW - Magnetic deflectometry KW - Matter-waves KW - Metrology Y1 - VL - 20 IS - 7 CY - Basel ER - TY - CHAP A1 - Mairhofer, Lukas A1 - Dippel, Anne T1 - Traces and Patterns. Pictures of Interferences and Collisions in the Physics Lab T2 - Traces. Generating What Was There KW - interferences Y1 - 2021 ER - TY - CHAP A1 - Mairhofer, Lukas T1 - Observing the Unobservable: Quantum Interference of Complex Macromolecules T2 - Interferences - Events KW - quantum KW - interference Y1 - 2021 ER - TY - JOUR A1 - Mairhofer, Lukas A1 - Eibenberger, Sandra A1 - Cotter, Joe A1 - Romirer, Marion A1 - Shayeghi, Armin A1 - Arndt, Markus T1 - Quantum-assisted metrology of neutral vitamins in the gas-phase JF - Angewandte Chemie International Edition N2 - It has recently been shown that matter-wave interferometry can be used to imprint a periodic nanostructure onto a molecular beam, which provides a highly sensitive tool for beam displacement measurements. Herein, we used this feature to measure electronic properties of provitamin A, vitamin E, and vitamin K1 in the gas phase for the first time. The shift of the matter-wave fringes in a static electric field encodes the molecular susceptibility and the time-averaged dynamic electric dipole moment. The dependence of the fringe pattern on the intensity of the central light-wave diffraction grating was used to determine the molecular optical polarizability. Comparison of our experimental findings with molecular dynamics simulations and density functional theory provides a rich picture of the electronic structures and dynamics of these biomolecules in the gas phase with β-carotene as a particularly interesting example. KW - Deflectometry KW - Electronic structure KW - Interferometry Y1 - ER - TY - JOUR A1 - Geyer, Philipp A1 - Sezer, Ugur A1 - Rodewald, Jonas A1 - Mairhofer, Lukas A1 - Dörre, Nadine A1 - Haslinger, Philipp A1 - Eibenberger, Sandra A1 - Brand, Christian A1 - Arndt, Markus T1 - Perspectives for Quantum Interference with Biomolecules and Biomolecular Clusters JF - Physica Scripta KW - Quanteninterferenz KW - Biomoleküle Y1 - VL - 91 IS - 6 ER - TY - CHAP A1 - Mairhofer, Lukas T1 - Beobachtung in den Naturwissenschaften und bei Brecht T2 - Brecht und Naturwissenschaften KW - Brecht Y1 - 2021 ER - TY - JOUR A1 - Cotter, Joe A1 - Eibenberger, Sandra A1 - Mairhofer, Lukas A1 - Cheng, Xiaxi A1 - Asenbaum, Peter A1 - Arndt, Markus A1 - Walter, Kai A1 - Nimmrichter, Stefan A1 - Hornberger, Klaus T1 - Coherence in the presence of absorption and heating in a molecule interferometer JF - Nature Communications KW - Quantenphysik KW - Molekülinterferometer Y1 - IS - 6 ER - TY - CHAP A1 - Mairhofer, Lukas T1 - 'Die Spieler die wir sind' - zu einer Denkfigur im Kaukasischen Kreidekreis T2 - Brecht Yearbook KW - Philosophie Y1 - IS - 38 PB - University of Wisconsin Press ER - TY - JOUR A1 - Krizek, Gerd Christian A1 - Mairhofer, Lukas T1 - Notions of Completeness in the EPR Discussion JF - Entropy N2 - We explore the different notions of completeness applied in the EPR discussion following and amending the thorough analysis of Arthur Fine. To this aim, we propose a classification scheme for scientific theories that provides a methodology for analyzing the different levels at which interpretive approaches come into play. This allows us to contrast several concepts of completeness that operate on specific levels of the theory. We introduce the notion of theory completeness and compare it with the established notions of Born completeness, Schrödinger completeness and bijective completeness. We relate these notions to the recent concept of ????-completeness and predictable completeness. The paper shows that the EPR argument contains conflicting versions of completeness. The confusion of these notions led to misunderstandings in the EPR debate and hindered its progress. Their clarification will thus contribute to recent debates on interpretational issues of quantum mechanics. Finally, we discuss the connection between the EPR paper and the Einstein–Rosen paper with regard to the question of completeness. KW - quantum mechanics KW - interpretation KW - EPR Y1 - U6 - http://dx.doi.org/10.3390/e25040585 VL - 25 IS - 4 ER - TY - JOUR A1 - Mairhofer, Lukas A1 - Maiwöger, Mira A1 - Riepl, Martin A1 - Embacher, Franz A1 - Krizek, Gerd Christian T1 - Experimente zur Quanteninformation JF - plusLucis KW - Quanteninformation KW - Experimente Y1 - IS - 2 SP - 7 EP - 7 ER -