Quantum phenomena via complex measure: Holomorphic extension

<p>Atomic and molecular properties could be evaluated from the fundamental Schrodinger’s equation and therefore represent different modalities of the same quantum phenomena. Here we present AIMNet, a modular and chemically inspired deep neural network potential. We used AIMNet with multitarget training to learn multiple modalities of the state of the atom in a molecular system. The resulting model shows on several benchmark datasets the state-of-the-art accuracy, comparable to the results of orders of magnitude more expensive DFT methods. It can simultaneously predict several atomic and molecular properties without an increase in computational cost. With AIMNet we show a new dimension of transferability: the ability to learn new targets utilizing multimodal information from previous training. The model can learn implicit solvation energy (like SMD) utilizing only a fraction of original training data, and archive MAD error of 1.1 kcal/mol compared to experimental solvation free energies in MNSol database.</p>

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The Necessity of Sufficiency

10.1093/oso/9780190842215.003.0026 ◽

2018 ◽

Author(s):

Bruce L. Gordon

Keyword(s):

Recent Work ◽

Quantum Physics ◽

Structural Realism ◽

Sufficient Reason ◽

Divine Action ◽

Ontic Structural Realism ◽

Existence Of God ◽

Principle Of Sufficient Reason ◽

Adequate Understanding ◽

Quantum Phenomena

There is an argument for the existence of God from the incompleteness of nature that is vaguely present in Plantinga’s recent work. This argument, which rests on the metaphysical implications of quantum physics and the philosophical deficiency of necessitarian conceptions of physical law, deserves to be given a clear formulation. The goal is to demonstrate, via a suitably articulated principle of sufficient reason, that divine action in an occasionalist mode is needed (and hence God’s existence is required) to bring causal closure to nature and render it ontologically functional. The best explanation for quantum phenomena and the most adequate understanding of general providence turns out to rest on an ontic structural realism in physics that is grounded in the immaterialist metaphysics of theistic idealism.

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Quantum Polaritonic

10.1093/oso/9780198782995.003.0011 ◽

2017 ◽

Author(s):

Alexey V. Kavokin ◽

Jeremy J. Baumberg ◽

Guillaume Malpuech ◽

Fabrice P. Laussy

Keyword(s):

Phase Transitions ◽

Quantum Information ◽

Quantum Information Processing ◽

Quantum Phase Transitions ◽

Macroscopic Quantum ◽

Quantum Simulations ◽

Macroscopic Quantum Phenomena ◽

Microcavity Polaritons ◽

Quantum Phenomena ◽

The One

Microcavity polaritons have demonstrated their unique propensity to host macroscopic quantum phenomena. While they appear to be highly promising for applications in a classical realm, they are still far from competing even with decade old electronics. Another playground where polaritons could emerge as strong contenders is the microscopic quantum regime with single-particle effects and nonlinearities at the one-polariton level. Several theoretical proposals exist to explore polariton blockade mechanisms, realize sophisticated quantum phase transitions, implement quantum simulations and/or quantum information processing, thereby opening a new page of the polariton physics when such ideas will be implemented in the laboratory.

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Quantum Physics Literacy Aimed at K12 and the General Public

Universe ◽

10.3390/universe7040086 ◽

2021 ◽

Vol 7 (4) ◽

pp. 86

Author(s):

Caterina Foti ◽

Daria Anttila ◽

Sabrina Maniscalco ◽

Maria Luisa Chiofalo

Keyword(s):

Cultural Change ◽

General Public ◽

Quantum Physics ◽

Physics Teaching ◽

Physics Students ◽

Formidable Challenge ◽

Challenges And Opportunities ◽

Quantum Phenomena ◽

Smart Community ◽

Quantum Science

Educating K12 students and general public in quantum physics represents an evitable must no longer since quantum technologies are going to revolutionize our lives. Quantum literacy is a formidable challenge and an extraordinary opportunity for a massive cultural uplift, where citizens learn how to engender creativity and practice a new way of thinking, essential for smart community building. Scientific thinking hinges on analyzing facts and creating understanding, and it is then formulated with the dense mathematical language for later fact checking. Within classical physics, learners’ intuition may in principle be educated via classroom demonstrations of everyday-life phenomena. Their understanding can even be framed with the mathematics suited to their instruction degree. For quantum physics, on the contrary, we have no experience of quantum phenomena and the required mathematics is beyond non-expert reach. Therefore, educating intuition needs imagination. Without rooting to experiments and some degree of formal framing, educators face the risk to provide only evanescent tales, often misled, while resorting to familiar analogies. Here, we report on the realization of QPlayLearn, an online platform conceived to explicitly address challenges and opportunities of massive quantum literacy. QPlayLearn’s mission is to provide multilevel education on quantum science and technologies to anyone, regardless of age and background. To this aim, innovative interactive tools enhance the learning process effectiveness, fun, and accessibility, while remaining grounded on scientific correctness. Examples are games for basic quantum physics teaching, on-purpose designed animations, and easy-to-understand explanations on terminology and concepts by global experts. As a strategy for massive cultural change, QPlayLearn offers diversified content for different target groups, from primary school all the way to university physics students. It is addressed also to companies wishing to understand the potential of the emergent quantum industry, journalists, and policymakers needing to seize what quantum technologies are about, as well as all quantum science enthusiasts.

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Demonstrating the power of quantum computers, certification of highly entangled measurements and scalable quantum nonlocality

npj Quantum Information ◽

10.1038/s41534-021-00450-x ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Elisa Bäumer ◽

Nicolas Gisin ◽

Armin Tavakoli

Keyword(s):

Quantum Computer ◽

Outcome Measurement ◽

Bell State ◽

Bell Inequalities ◽

Quantum Correlations ◽

Entanglement Swapping ◽

Quantum Nonlocality ◽

Quantum Computers ◽

Classical Models ◽

Quantum Phenomena

AbstractIncreasingly sophisticated quantum computers motivate the exploration of their abilities in certifying genuine quantum phenomena. Here, we demonstrate the power of state-of-the-art IBM quantum computers in correlation experiments inspired by quantum networks. Our experiments feature up to 12 qubits and require the implementation of paradigmatic Bell-State Measurements for scalable entanglement-swapping. First, we demonstrate quantum correlations that defy classical models in up to nine-qubit systems while only assuming that the quantum computer operates on qubits. Harvesting these quantum advantages, we are able to certify 82 basis elements as entangled in a 512-outcome measurement. Then, we relax the qubit assumption and consider quantum nonlocality in a scenario with multiple independent entangled states arranged in a star configuration. We report quantum violations of source-independent Bell inequalities for up to ten qubits. Our results demonstrate the ability of quantum computers to outperform classical limitations and certify scalable entangled measurements.

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Cosmic hylomorphism

European Journal for Philosophy of Science ◽

10.1007/s13194-020-00342-5 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

William M. R. Simpson

Keyword(s):

Dimensional Space ◽

Three Dimensional ◽

Bohmian Mechanics ◽

Temporal Development ◽

Primitive Ontology ◽

Law Of Nature ◽

Dimensional Spacetime ◽

Global Configuration ◽

Quantum Phenomena ◽

Three Dimensional Space

AbstractThe primitive ontology approach to quantum mechanics seeks to account for quantum phenomena in terms of a distribution of matter in three-dimensional space (or four-dimensional spacetime) and a law of nature that describes its temporal development. This approach to explaining quantum phenomena is compatible with either a Humean or powerist account of laws. In this paper, I offer a powerist ontology in which the law is specified by Bohmian mechanics for a global configuration of particles. Unlike in other powerist ontologies, however, this law is not grounded in a structural power that is instantiated by the global configuration. Instead, I combine the primitive ontology approach with Aristotle’s doctrine of hylomorphism to create a new metaphysical model, in which the cosmos is a hylomorphic substance with an intrinsic power to choreograph the trajectories of the particles.

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A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling

Nature Communications ◽

10.1038/s41467-019-13814-x ◽

2020 ◽

Vol 11 (1) ◽

Cited By ~ 36

Author(s):

Chaowei Hu ◽

Kyle N. Gordon ◽

Pengfei Liu ◽

Jinyu Liu ◽

Xiaoqing Zhou ◽

...

Keyword(s):

Van Der Waals ◽

Surface States ◽

Magnetic Coupling ◽

Anomalous Hall Effect ◽

Saturation Field ◽

Angle Resolved Photoemission Spectroscopy ◽

Ideal System ◽

Out Of Plane ◽

Weak Interlayer ◽

Quantum Phenomena

AbstractMagnetic topological insulators (TI) provide an important material platform to explore quantum phenomena such as quantized anomalous Hall effect and Majorana modes, etc. Their successful material realization is thus essential for our fundamental understanding and potential technical revolutions. By realizing a bulk van der Waals material MnBi4Te7 with alternating septuple [MnBi2Te4] and quintuple [Bi2Te3] layers, we show that it is ferromagnetic in plane but antiferromagnetic along the c axis with an out-of-plane saturation field of ~0.22 T at 2 K. Our angle-resolved photoemission spectroscopy measurements and first-principles calculations further demonstrate that MnBi4Te7 is a Z2 antiferromagnetic TI with two types of surface states associated with the [MnBi2Te4] or [Bi2Te3] termination, respectively. Additionally, its superlattice nature may make various heterostructures of [MnBi2Te4] and [Bi2Te3] layers possible by exfoliation. Therefore, the low saturation field and the superlattice nature of MnBi4Te7 make it an ideal system to investigate rich emergent phenomena.

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