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Non-Abelian gauge invariance from dynamical decoupling
Valentin Kasper, Torsten V. Zache, Fred Jendrzejewski +2
Lattice gauge theories are fundamental to such distinct fields as particle physics, condensed matter or quantum information theory. The recent progress in the control of artificial…
Inferring Nonlinear Many-Body Bell Inequalities From Average Two-Body Correlations: Systematic Approach for Arbitrary Spin-j Ensembles
Guillem Müller-Rigat, Albert Aloy, Maciej Lewenstein +1
Violating Bell's inequalities (BIs) allows one to certify the preparation of entangled states from minimal assumptions -- in a device-independent manner. Finding BIs tailored to ma…
Storage capacity and learning capability of quantum neural networks
Maciej Lewenstein, Aikaterini Gratsea, Andreu Riera-Campeny +3
We study the storage capacity of quantum neural networks (QNNs) described as completely positive trace preserving (CPTP) maps, which act on an -dimensional Hilbert space. We dem…
Resource theory of heat and work with non-commuting charges
Zahra Baghali Khanian, Manabendra Nath Bera, Arnau Riera +2
We consider a theory of quantum thermodynamics with multiple conserved quantities (or charges). To this end, we generalize the seminal results of Sparaciari et al. [PRA 96:052112,…
Quantum dynamics of Bose-polaron in a -dimensional Bose Einstein condensate
M. Miskeen Khan, H. Terças, J. T. Mendonça +4
We study the quantum motion of an impurity atom immersed in a Bose Einstein condensate in arbitrary dimension. The Bogoliubov excitations of the Bose Einstein condensate act as a b…
Significant nonclassical paths with atoms and cavities in the double-slit experiment
J. O. de Almeida, M. Lewenstein, J. Q. Quach
In the the double-slit experiment, nonclassical paths are Feynman paths that go through both slits. Prior work with atom cavities as which-way detectors in the double-slit experime…
From the Jaynes-Cummings model to non-Abelian gauge theories: a guided tour for the quantum engineer
Valentin Kasper, Gediminas Juzeliunas, Maciej Lewenstein +2
The design of quantum many body systems, which have to fulfill an extensive number of constraints, appears as a formidable challenge within the field of quantum simulation. Lattice…
Phase Detection with Neural Networks: Interpreting the Black Box
Anna Dawid, Patrick Huembeli, Michał Tomza +2
Neural networks (NNs) usually hinder any insight into the reasoning behind their predictions. We demonstrate how influence functions can unravel the black box of NN when trained to…
Unsupervised phase discovery with deep anomaly detection
Korbinian Kottmann, Patrick Huembeli, Maciej Lewenstein +1
We demonstrate how to explore phase diagrams with automated and unsupervised machine learning to find regions of interest for possible new phases. In contrast to supervised learnin…
Discrimination and estimation of incoherent sources under misalignment
J. O. de Almeida, J. Kołodyński, C. Hirche +2
Spatially resolving two incoherent point sources whose separation is well below the diffraction limit dictated by classical optics has recently been shown possible using techniques…
The imaginary part of the high-harmonic cutoff
Emilio Pisanty, Marcelo F. Ciappina, Maciej Lewenstein
High-harmonic generation - the emission of high-frequency radiation by the ionization and subsequent recombination of an atomic electron driven by a strong laser field - is widely…