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# Quantum Physics - Science topic

Explore the latest publications in Quantum Physics, and find Quantum Physics experts.

Publications related to Quantum Physics (10,000)

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Physical unclonable functions (PUFs) have been proposed as a way to identify and authenticate electronic devices. Recently, several ideas have been presented to that aim to achieve the same for quantum devices. Some of these constructions apply single-qubit gates in order to provide a secure fingerprint of the quantum device. In this work, we forma...

The data-embedding process is one of the bottlenecks of quantum machine learning, potentially negating any quantum speedups. In light of this, more effective data-encoding strategies are necessary. We propose a photonic-based bosonic data-encoding scheme that embeds classical data points using fewer encoding layers and circumventing the need for no...

Fractal calculus is the simple, constructive, and algorithmic approach to natural processes modeling using fractals that was impossible for smooth differentiable structure and usual modeling tools. It is the calculus of the future and will have many applications.
This book is the first to introduce fractal calculus and provide a basis for research...

Wie kommt der Zufall in unsere Welt? Und warum ist so vieles nicht vorhersehbar?
Verständlich, spannend und amüsant erzählend entführt uns der Autor in die Welt der Chemie, Quantenphysik und Biologie. Die Astronomie und Philosophie streifend, werden wir Zeugen einer lohnenden Entdeckungsreise. Dabei entwickelt er auf der Basis der Naturgesetze ei...

Section one gives a proof based on the properties of the trigometric Fourier time series (not transform) that all Doppler shifts axial, transverse and gravitational change observed time periods in the series and therefore in the time function the series repents. That is a required to understand the following: ħ = ∆t ∆e, were ∆t=uncertainty in time...

The unity of existence (unity of body) is an opinion that argues that the one who is created and manages it that there is no existence other than Allah. Everything is in him and from him. There is only one reality and that is God. Everything that appears is not him, but his manifestation. He permeates his Works with his names and attributes and eve...

We introduce a systematically improvable family of variational wave functions for the simulation of strongly correlated fermionic systems. This family consists of Slater determinants in an augmented Hilbert space involving “hidden” additional fermionic degrees of freedom. These determinants are projected onto the physical Hilbert space through a co...

The goal of this essay is twofold. First, it provides a quick look at the foundations of modern relational mechanics by tracing its development from Julian Barbour and Bruno Bertotti's original ideas until present-day's pure shape dynamics. Secondly, it discusses the most appropriate metaphysics for pure shape dynamics, showing that relationalism i...

European Journal of Science and Theology, October 2022, vol.18, no.5, pp. 31-46. This final proof will be the published paper, online at EJST in September. Six recommendations. Over 190 reads. PRAISE: "The paper is very valuable.... The author clearly sets out the boundaries of his objective and provides a clear line of argument. [S]ince this parti...

The article argues that there has always been a solution of theory of relativity in quantum physics and the proof is by understanding theory of relativity in random with energy, efficiency, time and size of two similar objects. Thus not only that time and space is bent near the event horizon of a black hole, it can be bent at any spatial by exploit...

Back to natural physics! The goal must be to discover and understand real nature. Nature is not theoretical in nature, but nature is very natural and real. Relativity and quantum physics are ingenious and certainly correct as theories, but they cannot be combined. Since nature is natural and not theoretical, both mainstream theories are far from th...

Training a quantum machine learning model generally requires a large labeled dataset, which incurs high labeling and computational costs. To reduce such costs, a selective training strategy, called active learning (AL), chooses only a subset of the original dataset to learn while maintaining the trained model's performance. Here, we design and impl...

Zurück zu einer natürlichen Physik! Das Ziel muss es sein, die reale Natur zu entdecken und zu verstehen. Die Natur ist nicht theoretischer Natur ist, sondern Natur sehr natürlich und real. Relativitätstheorie und Quantenphysik sind als Theorien genial und sicher richtig, lassen sich aber nicht vereinen. Da die Natur natürlich ist und nicht theoret...

Negative absolute temperature has wide range of applications, such as high-efficiency quantum heat engines, quantum refrigerators, and quantum simulation. In a recent paper [Phys. Rev. Lett. 120, 060403 (2018)], the authors proposed two spin ensembles coupled to the same reservoir collectively, one ensemble relaxes to negative temperature since two...

In recent years, non-Hermitian quantum physics has gained a lot in popularity in the quantum optics and condensed matter communities in order to model quantum systems with varying symmetries. In this paper, we identify a non-standard inner product that implies bosonic commutator relations for local electric and magnetic field observables and leads...

The content of this paper can be roughly organized into a three-level hierarchy of generality. At the first, most general level, we introduce a new language which allows us to express various categorical structures in a systematic and explicit manner in terms of so-called 2-schemes. Although 2-schemes can formalize categorical structures such as sy...

Introducing the Business Agility portmanteau words Intragility, Interagility and Extragility as well as the Learning & Development Context for Complementary Types of Agility.
Are there Types of Agilities; if so, does Organizational Scale and Structure Explain Why Differences Exist? Agility could be like Physics in that Quantum Physics behaves Diff...

Although the Standard Model of particle physics is usually formulated in terms of fields, it can be equivalently formulated in terms of particles and strings. In this picture particles and open strings are always coupled. This offers an intuitive and graphical explanation for the otherwise mysterious gauge symmetry. In addition, the particle–string...

A Correction to this paper has been published: 10.1007/s10955-013-0890-x

The anatomicalAnatomical view is the approach often used to understand the brainBrain. This view largely relies upon brainwavesBrainwave, their relation to neuropsychiatric disordersNeuropsychiatric disorder, namely epilepsyEpilepsy, and their application to brain mappingBrain mapping, brainBrain-computer interfaces, and consciousnessConsciousness....

The following work deals with the definition of a naturally explainable physics. The "natural physics" contrasts with the general mathematical approach of the general theory of relativity and the particle models of quantum physics. In "natural physics", the physical processes are to be described with natural and real comprehensible models. With nat...

Die nachfolgende Arbeit befasst sich mit der Definition einer natürlich erklärbaren Physik. Im Gegensatz zum allgemeinen mathematischen Zugang der Allgemeinen Relativitätstheorie und der Teilchenmodelle der Quantenphysik soll die „Natürliche Physik“, die physikalischen Vorgänge mit natürlichen und real erfassbaren Modellen beschrieben werden. Mit d...

The following thesis deals with a naturally explainable physics. The special thing about this work is that no new theory has been invented. Based on old findings of well-known scientists, the basics of physics are questioned and rearranged. From the real understanding of the field constants and impedance of the vacuum, fundamental natural relations...

Die nachfolgende Arbeit befasst sich mit einer natürlich erklärbaren Physik. Das Besondere an dieser Arbeit ist, dass keine neue Theorie erfunden wurde. Ausgehend von alten Erkenntnissen von bekannten Wissenschaftlern werden die Grundlagen der Physik hinterfragt und neu geordnet. Aus dem realen Verständnis der Feldkonstanten und Impedanz des Vakuum...

Device-independent quantum key distribution (DIQKD) enables the generation of secret keys over an untrusted channel using uncharacterized and potentially untrusted devices1–9. The proper and secure functioning of the devices can be certified by a statistical test using a Bell inequality10–12. This test originates from the foundations of quantum phy...

We have proposed the multi-fold theory over the last two years with a fundamental initial paper then many follow ups. The paper succinctly summarizes the theory so far in a few words. "Just as General Relativity taught us that "spacetime tells matter how to move; matter tells spacetime how to curve", the Multi-fold theory argues that Quantum Physic...

Quantum computing is a beautiful fusion of quantum physics with computer science. However it is now in its infancy. Currently quantum computers are not reliable enough to solve any practical problems better than classical computers. It is worth mentioning in this context that quantum computations are not a strange way of doing a few special calcula...

This study focuses on tensor Z-eigenvalue localization and its application in the geometric measure of entanglement for multipartite quantum states. A new Z-eigenvalue localization theorem and the bounds for the Z-spectral radius are derived, which are more precise than some of the existing results. On the other hand, we present theoretical bounds...

The aim of this paper is to study a class of superoscillatory functions in several variables, removing some restrictions on the functions that we introduced in a previous paper. Since the tools that we used with our approach are not common knowledge we will give detailed proof for the case of two variables. The results proved for superoscillatory f...

Programação Neurolinguística é indicada como ferramenta para lidar com medos, desafios pessoais e coletivos. A prática da meditação pode promover ganhos aos profissionais da saúde, especialmente ao lidar com o estresse profissional. No contexto social, estas práticas muitas vezes fazem uso da Física Quântica, de forma não científica, para expor sua...

Lexical aspect in English has been defined through phases and presence (“write”) or absence (“seem”) of end points (or bounds) (Smith 1991). Situations may have two end points (“activities”), four end points (“accomplishments”), or none (“states”). Additionally, grammatical aspect contributes information on boundedness by expressing whether situati...

It is well known that classical randomization, either through behavioural or mixed strategies does not improve the optimal cost of a team decision problem. We introduce a new class of stochastic strategies for static team decision problems that use quantum entanglement to generate randomness. We demonstrate a numerical example of a static team deci...

One of the most influential contemporary authors of the new materialist turn in the social sciences is Karen Barad. Barad’s work in agential realism, based on her interpretations of quantum physics, has been widely cited within a growing body of new materialist publications. However, in translating Barad’s assertions into social domains, there has...

Identification of phases in many-body quantum states is arguably among the most important and challenging problems of computational quantum physics. The non-trivial phase structure of geometrically frustrated or finite-density electron systems is the main obstacle that severely limits the applicability of the quantum Monte Carlo, variational, and m...

Symmetries are vital in the study of physical phenomena such as quantum physics and the micro-world, among others. Then, these phenomena reduce to solving nonlinear equations in abstract spaces. These equations in turn are mostly solved iteratively. That is why the objective of this paper was to obtain a uniform way to study three-step iterative me...

Time-frequency localization operators (with Gaussian window) $L_F:L^2(\mathbb{R}^d)\to L^2(\mathbb{R}^d)$, where $F$ is a weight in $\mathbb{R}^{2d}$, were introduced in signal processing by I. Daubechies in 1988, inaugurating a new, geometric, phase-space perspective. Sharp upper bounds for the norm (and the singular values) of such operators turn...

Koopman operator theory has been successfully applied to problems from various research areas such as fluid dynamics, molecular dynamics, climate science, engineering, and biology. Applications include detecting metastable or coherent sets, coarse-graining, system identification, and control. There is an intricate connection between dynamical syste...

This paper proposes a theoretical explanation for the observed phenomenon of increased solar core rotation. The approach integrates classical physics as well as quantum physics and is based on proven observed phenomenon. At the simplest, we propose that the faster rotation is caused by increased quantum tunneling effects that have a statistical ten...

BOOK CHAPTER PLAN FROM A BOOK PROJECT AT CEASP OP JINDAL GLOBAL

When employing Feynman path integral to compute propagators in quantum physics, the sum over the set of all paths is not always na\"ive. In fact, often an auxiliary phase has to be included as a weight for each path. In this article we discuss the nature of this auxiliary phase when the classical path involved is reflected through the instance of a...

The atomically thin MnBi2Te4 crystal is a novel magnetic topological insulator, exhibiting exotic quantum physics. Here we report a systematic investigation of ultrafast carrier dynamics and coherent interlayer phonons in few-layer MnBi2Te4 as a function of layer number using time-resolved pump-probe reflectivity spectroscopy. Pronounced coherent p...

Hans Reichenbach’s posthumous book The Direction of Time ends somewhere between Socratic aporia and historical irony. Prompted by Feynman’s diagrammatic formulation of quantum electrodynamics, Reichenbach eventually abandoned the delicate balancing between the macroscopic foundation of the direction of time and microscopic descriptions of time orde...

Physics education research on explanatory videos has experienced a boost in recent years. Due to the vast number of explanatory videos available online, e.g. on YouTube, finding videos of high explaining quality is a challenging task for learners, teachers, and lecturers alike. Prior research on the explaining quality of explanatory videos on class...

Quantum spins, referred to the spin operator preserved by full SU(2) symmetry in the absence of the magnetic anistropy, have been proposed to host exotic interactions with superconductivity4. However, spin orbit coupling and crystal field splitting normally cause a significant magnetic anisotropy for d/f-shell spins on surfaces6,9, breaking SU(2) s...

The coupling between two or more objects can generally be categorized as strong or weak. In cavity quantum electrodynamics for example, when the coupling strength is larger than the loss rate the coupling is termed strong, and otherwise it is dubbed weak. Ultrastrong coupling, where the interaction energy is of the same order of magnitude as the ba...

Samenvatting Muziek is een samenspel van Energie en Informatie. Energie zit in de frequenties van de opeenvolgende of samengestelde tonen terwijl de volgorde van tonen non-materiele informatie omvat. De auteurs poneren de visie dat onze werkelijkheid immer een combinatie is van drie funderende aspecten: Massa, Energie en Informatie en zij laten zie...

The hypothesis is here developed that a flux of information is equivalent to energy. The basis for this hypothesis is an information-theoretic interpretation of Planck's equation for the photon energy. In a gedankenexperiment the absorption of a photon is interpreted as the transmission of 1 bit of information from a photon to a detector. The time...

The coupling between two or more objects can generally be categorized as strong or weak. In cavity quantum electrodynamics for example, when the coupling strength is larger than the loss rate the coupling is termed strong, and otherwise it is dubbed weak. Ultrastrong coupling, where the interaction energy is of the same order of magnitude as the ba...

Quantum key distribution — the establishment of information-theoretically secure keys based on quantum physics — is mainly limited by its practical performance, which is characterised by the dependence of the key rate on the channel transmittance R(η). Recently, schemes based on single-photon interference have been proposed to improve the key rate...

While doing routine checks of a proposed improved value for Newtonian gravitational constant G in a 2021 paper of Alex Kritov [1] (suggested to me by ResearchGate) did not look like convincing physical results to me with respect to ⅈSpace-geometry (like G, fine structure constant α and others). However, his derivation of a quantum physical relation...

The following work deals with the analysis of space and the definition of a possible ether model. No new mathematical theory is presented. Starting from a detailed understanding of the field constants with the recognized definitions, a single constant is questioned and transformed to a new value with new units. Together with the magnetic field cons...

Die nachfolgende Arbeit befasst sich mit der Analyse des Raumes und der Definition eines möglichen Äther-Modells. Es wird keine neue mathematische Theorie präsentiert. Ausgehend vom detaillierten Verständnis der Feldkonstanten mit den anerkannten Definitionen wird eine einzige Konstante hinterfragt und transformiert auf einen neuen Wert mit neuen E...

Over the past two decades quantum engineering has made significant advances in our ability to create genuine quantum many-body systems using ultracold atoms. In particular, some prototypical exactly solvable Yang-Baxter systems have been successfully realized allowing us to confront elegant and sophisticated exact solutions of these systems with th...

The damping of the starting ball of NEWTON’s Cradle “δ(1st sphere of NEWTON’s cradle) ≈ 2ħ π t = 2ħ π n t(Planck)“ allows to introduce a KALUZA-KLEIN extra dimension into classical physics. C(ħ) = 2ħ π respective C(l(PLANCK)) = 2 l(Planck) π is the circumference of a circle and the basis of a cylinder with the length t = n(integer) t(Planck); the c...

This is an attempt to explain how Mathematica is used in the field of quantum physics. Here are a lot of examples such as states and operators, Spins, harmonic oscillator, interaction between atoms and field, entanglement, classical correlation, quantum correlation (quantum discord), geometric quantum correlation.

To understand how information is carried away by hawking particles from no-hair blackholes is a fundamental question in modern gravitation and quantum physics research. We show in this work that behind this question is a new and universal radiation mechanism, Gravitation Induced Monopole Radiation, or GIMR hereafter. This mechanism happens to all k...

The foundational principle of quantum physics is the notion of entanglement, which can best be described as the ontological inseparability of subatomic particles in such a way that the
measurement of one particle’s quantum state determines the possible quantum states of all other particles. Supported by hard data in quantum physics, this nonlocal c...

Over the last decades, nanotechnology applied in medicine (nanomedicine) has sparked great interest from the scientific community, thanks to the possibility to engineer nanostructured materials, including nanoparticles (NPs), for a specific application. Their small size confers them unique properties because they are subject to physical laws in the...

By investigating the Feynman Path Integral we prove that elementary quantum particle dynamics are directly associated to single compact (cyclic) world-line parameters, playing the role of the particles' internal clock, implicit in ordinary undulatory mechanics and indirectly observed for instance in Time Crystals. This allows us to formulate a nove...

The ability to create, manipulate and detect non-classical states of light has been key for many recent achievements in quantum physics and for developing quantum technologies. Achieving the same level of control over phonons, the quanta of vibrations, could have a similar impact, in particular on the fields of quantum sensing and quantum informati...

The aim of this thesis is to bridge the gap between the world of physics research and secondary education on contemporary quantum physics. We fostered the creation of a generative learning environment formed by quantum physics researchers, high school physics teachers and student. The result was the development of an teaching approach to the core i...

Quantum information processing has conceptually changed the way we process and transmit information. Quantum physics, which explains the strange behaviour of matter at the microscopic dimensions, has matured into a quantum technology that can harness this strange behaviour for technological applications with far-reaching consequences, which uses qu...

In the century following its discovery, applications for quantum physics are opening a new world of technological possibilities. With the current decade witnessing quantum supremacy, quantum technologies are already starting to change the ways information is generated, transmitted, stored and processed. The next major milestone in quantum technolog...

In this paper I examine compatibilism and incompatibilism about whether the self can be both a subject and an object in the same awareness at the same time. While this is an old debate that many traditions of philosophy have contributed to, my point of departure is the work of A.C. Mukerji (an Indian philosopher of the modern era) who worked on the...

Levitating, controlling, and detecting the motion of mesoscopic objects is useful for inertial sensing and fundamental studies in quantum physics. We report the first experimental measurements of Meissner-effect levitation for a sequence of identical millimeter-scale neodymium magnets having varying strengths within a cm-scale superconducting alumi...

Since Allen et al. demonstrated 30 years ago that beams with helical wavefronts carry orbital angular momentum (OAM), the OAM of beams has attracted extensive attention and stimulated lots of applications in both classical and quantum physics. Akin to an optical frequency comb, a beam can carry multiple variousOAM components simultaneously. A serie...

The teaching of quantum physics is challenging, not the least because teachers must overcome the traditional narrative approach, students must gain a conceptual understanding of fundamentals, and citizens must become aware of quantum technologies. Quantum games are powerful tools to overcome obstacles and push one’s limits without fear of failure....

Sometimes we come across situations or events where the quantum point of view is presented as a fundamentally unsound theory. Nothing could be further from the truth. Quantum physics is not only the most fruitful scientific theory in history, but also the most resistant and proven in the face of any attempt at refutation. It remains the indispensab...

We use two-photon excitation to create biexcitonic complexes with two electron-hole pairs in different orbital levels of a GaAs/AlAs quantum dot. In addition to p-shell emission of the biexcitonic triplet states generated by two-photon excitation, we observe additional higher-energy resonances which are a signature of the radiative cascade of two-p...

Light-assisted micro-nanoscale temperature control in complex nanoparticle network attracts lots of research interests. Many efforts have been put on the optical properties of the nanoparticle networks and only a few investigations on its light-induced thermal behavior was reported. We consider two-dimensional (2D) square-lattice nanoparticle ensem...

Nonlinear model predictive control is widely adopted to manipulate bilinear systems, and bilinear models are ubiquitous in chemical process, mechanical system and quantum physics, to name a few. Running an MPC controller in real-time requires solving a non-convex optimization problem at step. In this work, we propose a novel parallel augmented Lagr...

One of the interesting open problems in the cosmological framework is applying quantum physics to the whole universe, consistently. Although different conceptual aspects of quantum cosmology are still very much alive, till now, all the attempts of obtaining a unique and well-defined version of quantum cosmology have been unfeasible. Motivated by wh...

The theory of quantum mechanics has often been thought to show an affinity with logical empiricism: in both, observation plays a central role, and questions about what is unobservable are dismissed. However, there were also strong tensions between the logical empiricism of the Vienna Circle and certain implications drawn from quantum physics. In th...

Nanoparticles trapped in optical tweezers emerged as an interesting platform for investigating fundamental effects in quantum physics. The ability to shape the optical trapping potential using spatial light modulation and quantum control of their motion using coherent scattering to an optical cavity mode predispose them for emulating a range of phy...

This report offers a modern perspective on the question of time directionality as it arises in a classical and quantum-mechanical context, based on key developments in the field of gravitational physics. Important clarifications are achieved regarding, in particular, the concepts of time reversal, negative energy, and time-symmetric causality. From...

From quasicrystalline alloys to twisted bilayer graphene, the study of material properties arising from quasiperiodic structure has driven advances in theory and applied science. Here we introduce a class of two-phase composites, structured by deterministic Moiré patterns, and we find that these composites display exotic behavior in their bulk elec...

This report offers a modern perspective on the question of time directionality as it arises in a classical and quantum-mechanical context, based on key developments in the field of gravitational physics. Important clarifications are achieved regarding, in particular, the concepts of time reversal, negative energy, and time-symmetric causality. From...

In this paper, we investigate the numerical solution of the coupled fractional massive Thirring equation with the aid of He’s fractional complex transform (FCT). This study plays a significant aspect in the field of quantum physics, weakly nonlinear thrilling waves, and nonlinear optics. The main advantage of FCT is that it converts the fractional...

In a Mathematical Program with Generalized Complementarity Constraints (MPGCC), complementarity relationships are imposed between each pair of variable blocks. MPGCC includes the traditional Mathematical Program with Complementarity Constraints (MPCC) as a special case. On account of the disjunctive feasible region, MPCC and MPGCC are generally dif...