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Nvidia, Palantir, and Broadcom Are Sending Shockwaves Through Wall Street With This $4.6 Billion Warningquantum-computing

Nvidia, Palantir, and Broadcom Are Sending Shockwaves Through Wall Street With This $4.6 Billion Warning

By Sean Williams – May 4, 2026 at 4:06AM ESTKey PointsThe AI revolution is a multitrillion-dollar opportunity being led by Nvidia, Palantir Technologies, and Broadcom. Form 4 filings with regulators show that AI insiders have been heavy net sellers of their company's stock.Additionally, a time-tested valuation metric points to this AI trio being historically expensive. Nothing has captured the attention of investors since the advent and proliferation of the internet in the mid-1990s quite like the rise of artificial intelligence (AI). Empowering software and systems with the tools to make split-second, autonomous decisions is a multitrillion-dollar addressable market. Arguably, no companies have benefited more from the evolution of AI than graphics processing unit (GPU) titan Nvidia (NVDA 0.48%), data-mining specialist Palantir Technologies (PLTR +3.57%), and networking solutions kingpin Broadcom (AVGO +0.88%). Broadcom joined the trillion-dollar club in December 2024, Nvidia became the first public company to top $5 trillion in October 2025, and Palantir shares have skyrocketed 2,100% since the end of 2022. While all three companies possess undeniable competitive advantages, the people who know these businesses best are sending worrisome signals. Image source: Getty Images. Insiders are sending a message -- are you paying attention? No group understands a company better than its insiders. An "insider" is a high-ranking executive, board member, or beneficial owner of at least 10% of a company's outstanding shares. These are individuals who may possess non-public information. Insiders are required by law to file Form 4 with regulators anytime they purchase or sell shares of their company, including the exercising of option contracts. This filing has to be made within two business days of a transaction. Based on aggregated Form 4 filings over the trailing year (as of April 28, 2026), insiders at these AI juggernauts have sent shockwaves through Wall Street with their

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Alphabet Just Showed Why It's a Top AI Stock to Buy Right Nowquantum-computing

Alphabet Just Showed Why It's a Top AI Stock to Buy Right Now

By Keithen Drury – May 4, 2026 at 2:45AM ESTKey PointsGoogle Cloud's revenue rose 63% year over year.Google Search posted its best growth in years. If I had told investors last year that Alphabet (GOOG +0.34%) (GOOGL +0.20%) would be one of the top artificial intelligence (AI) companies, I may have been laughed at. Alphabet has completed a phenomenal comeback and is easily among the best AI businesses out there, and its stock matches it. Over the past year, Alphabet's stock has more than doubled, showcasing its monster comeback. While some investors may be fearful of investing in Alphabet after a major run like that, I don't think it's too late. Alphabet just showed why it belongs in the conversation of best AI stocks on the market, and there's plenty more growth ahead for this tech leader. Image source: The Motley Fool. Google Cloud is on fire Most of Alphabet's AI-related revenue will show up in its Google Cloud division. Alphabet's AI strategy has basically been to offer the best free versions of AI, then get users to opt for more advanced models that charge per token used. Furthermore, many companies have opted to use Google Cloud's computing infrastructure, including its custom TPUs, to train and run AI models at a lower cost than GPU-based training. All of this added up to a blowout quarter for Google Cloud. In the first quarter, its revenue rose a jaw-dropping 63% year over year to $20 billion. If Alphabet can keep that growth up, then the hundreds of billions of dollars it's spending on data center construction is justified. ExpandNASDAQ: GOOGAlphabetToday's Change(0.34%) $1.28Current Price$383.22Key Data PointsMarket Cap$4.6TDay's Range$375.26 - $383.3952wk Range$149.49 - $383.39Volume108KAvg Vol21MGross Margin60.43%Dividend Yield0.22% But Google Cloud isn't the only division doing well. Last year, many believed that Google Search would soon be replaced by generative AI. However, that hasn't happened. What has happened is that Google has integrated generati

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Theoretical research fellow: The energy cost of non-classicalityquantum-computing

Theoretical research fellow: The energy cost of non-classicality

Application deadline: Monday, June 29, 2026Research group: Centre for Quantum Technologies Theory GroupEmployer web page: https://majulab.cnrs.fr/Job type: PostDocTags: quantum energeticsquantum opticsquantum thermodynamicsA Research Fellow position is open in the group of Alexia Auffèves (CNRS-MajuLab,CQT, Singapore) to work on fundamental aspects of quantum energetics applied to quantum optics. The candidate will explore relations between energy and non-classicality, both to provide new ways to characterize non-classical quantum states of light, and optimize processes to produce them. Context and goal of the project. Non-classical quantum states, from non-Gaussian states of light like Schrödinger cat states to entangled states, are precious resources for quantum technologies. Beyond their potential practical use, they also provide appealing fundamental objects to explore the quantum world. The focus of the project is on identifying and understanding energetic imprints of non-classicality (entanglement, non-Gaussianity, squeezing...). Such a fundamental understanding unlocks multiple research paths, from the definition of new measures and witnesses of non-classicality, to the construction of optimal processes under energetic constraints, or the identification of energetic advantages of quantum nature. Role of the research fellow. The fellow will contribute to build new concepts and thought experiments, develop related analytical and numerical tools, conduct feasibility studies and elaborate realistic proposals and will contribute to the data analysis of the experiments possibly inspired by the theoretical work. They will supervise PhD and master students, write papers, present the work in conferences and actively contribute to the scientific life of the group. The project has a broad goal and creativity is encouraged. About the funding origin. The project is partially funded through the French Quantum Strategy (funding initiatives OQuLus an

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Essential Duality and Maximal Non-signalling Extensions in Algebraic Quantum Field Theoryquantum-computing

Essential Duality and Maximal Non-signalling Extensions in Algebraic Quantum Field Theory

--> Quantum Physics arXiv:2605.00075 (quant-ph) [Submitted on 30 Apr 2026] Title:Essential Duality and Maximal Non-signalling Extensions in Algebraic Quantum Field Theory Authors:Hassan Nasreddine View a PDF of the paper titled Essential Duality and Maximal Non-signalling Extensions in Algebraic Quantum Field Theory, by Hassan Nasreddine View PDF HTML (experimental) Abstract:We show that, under additivity, the maximal von Neumann algebra extension of $\mathcal{A}(O)$ inside $B(\mathcal{H})$ whose inner automorphisms are non-signalling with respect to all spacelike-separated regions is $\mathcal{A}(O')'$. Consequently, $\mathcal{A}(O)$ is maximal with respect to this property if and only if essential duality holds. The proof is purely algebraic. When essential duality fails, we construct a proper extension all of whose inner automorphisms, and more generally all normal completely positive maps admitting Kraus operators in the algebra, are non-signalling. Under essential duality, any proper extension necessarily admits a signalling operation. An entropic formulation using Araki relative entropy provides a quantitative diagnostic of signalling, though it is not used in the proof. Additional structural results include the wedge-intersection identity $\mathcal{A}(O')' = \bigcap_{W \supset O}\mathcal{A}(W)$ and equivalent characterisations of essential duality. These results identify essential duality as an operational maximality condition within the given representation. Comments: Subjects: Quantum Physics (quant-ph); Mathematical Physics (math-ph) MSC classes: 46L60 (Primary), 81T05, 46L30 (Secondary) Cite as: arXiv:2605.00075 [quant-ph]   (or arXiv:2605.00075v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2605.00075 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Hassan Nasreddine [view email] [v1] Thu, 30 Apr 2026 13:45:27 UTC (26 KB) Full-text links: Access Paper: View a PDF of the paper titled Essential Duality a

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Left handness in a four-level atomic systemquantum-computing

Left handness in a four-level atomic system

--> Quantum Physics arXiv:2605.00077 (quant-ph) [Submitted on 30 Apr 2026] Title:Left handness in a four-level atomic system Authors:Shuncai Zhao, Zhengdong Liu View a PDF of the paper titled Left handness in a four-level atomic system, by Shuncai Zhao and 1 other authors View PDF HTML (experimental) Abstract:A scheme is proposed for realizing simultaneous negative permittivity and negative permeability based on quantum coherence in a four-level dense atomic system this http URL some parametric conditions the system shows that simultaneous negative permittivity and negative permeability(this http URL handness) can be achieved in a wider frequency band because of quantum this http URL the novelty properties of gain and dispersion near the resonance frequency may have some potential applications. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2605.00077 [quant-ph]   (or arXiv:2605.00077v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2605.00077 Focus to learn more arXiv-issued DOI via DataCite Journal reference: International Journal of Quantum Information,2009 07:04, 747-754 Related DOI: https://doi.org/10.1142/S0219749909005390 Focus to learn more DOI(s) linking to related resources Submission history From: Shun-Cai Zhao [view email] [v1] Thu, 30 Apr 2026 14:09:54 UTC (71 KB) Full-text links: Access Paper: View a PDF of the paper titled Left handness in a four-level atomic system, by Shuncai Zhao and 1 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-05 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Con

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A Unified Framework for Locally Stable Phasesquantum-computing

A Unified Framework for Locally Stable Phases

--> Quantum Physics arXiv:2605.00088 (quant-ph) [Submitted on 30 Apr 2026] Title:A Unified Framework for Locally Stable Phases Authors:Zhi Li, Raz Firanko, Timothy H. Hsieh View a PDF of the paper titled A Unified Framework for Locally Stable Phases, by Zhi Li and 2 other authors View PDF HTML (experimental) Abstract:We propose a unifying framework for characterizing pure and mixed state phases of matter across equilibrium, non equilibrium, and metastable regimes. We introduce the concept of locally stable states, defined by the operational property that any local operation (including post selection) can be reversed by a local channel. We prove that local stability is equivalent to a state being short range correlated, defined by the decay of both correlations and conditional mutual information. We demonstrate that these properties are invariant under locally reversible channels, thus defining locally stable phases. Furthermore, we prove that local stability implies both the decay of a family of nonlinear correlators, including the fidelity correlator, and the decay of correlations in the canonical purification, thus bridging the gap between mixed and pure states. Along the way, we establish two results which may be of independent interest: we show that post-selection on locally stable (short range correlated) states can be implemented via local channels and that quantum Markov chains can be characterized by the local computability of nonlinear observables. Comments: Subjects: Quantum Physics (quant-ph); Statistical Mechanics (cond-mat.stat-mech); Mathematical Physics (math-ph) Cite as: arXiv:2605.00088 [quant-ph]   (or arXiv:2605.00088v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2605.00088 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Timothy Hsieh [view email] [v1] Thu, 30 Apr 2026 18:00:00 UTC (5,027 KB) Full-text links: Access Paper: View a PDF of the paper titled A Unified Framework for Locally Stable P

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On-chip levitation of ferromagnetic microparticlesquantum-computing

On-chip levitation of ferromagnetic microparticles

--> Quantum Physics arXiv:2605.00090 (quant-ph) [Submitted on 30 Apr 2026] Title:On-chip levitation of ferromagnetic microparticles Authors:Martijn Janse, M. Luisa Mattana, Julian van Doorn, Eli van der Bent, Richard Wagner, Robert Smit, Bas Hensen View a PDF of the paper titled On-chip levitation of ferromagnetic microparticles, by Martijn Janse and 6 other authors View PDF HTML (experimental) Abstract:Levitation of microscopic objects in vacuum combines exceptional environmental isolation with precise control of their dynamics, pushing the limits of sensing and macroscopic quantum physics. In particular, magnetic levitation allows a large range of particle sizes, while avoiding detrimental effects from high-intensity optical trapping beams and electric field noise. However, existing diamagnetic and Meissner levitation approaches are typically constrained by low mechanical eigenfrequencies, limited integrability with other systems due to bulky coils or magnets, and, for Meissner levitation, the need for cryogenic operation. Here, we demonstrate a room-temperature on-chip magnetic levitation platform capable of stably levitating a nanogram (6.5 micrometer radius) ferromagnetic microsphere. The platform is scalable and tunable, and supports librational modes with eigenfrequencies exceeding 10 kHz. Further miniaturization and coupling to solid-state spin qubits could enable cooling to the quantum ground state. Beyond quantum experiments, this architecture enables integrated precision sensing and studies of isolated ferromagnet thermodynamics. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2605.00090 [quant-ph]   (or arXiv:2605.00090v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2605.00090 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Martijn Janse [view email] [v1] Thu, 30 Apr 2026 18:00:01 UTC (4,605 KB) Full-text links: Access Paper: View a PDF of the paper titled On-chip

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Graph-theory measures capture weak ergodicity breaking on large quantum systemsquantum-computing

Graph-theory measures capture weak ergodicity breaking on large quantum systems

--> Quantum Physics arXiv:2605.00094 (quant-ph) [Submitted on 30 Apr 2026] Title:Graph-theory measures capture weak ergodicity breaking on large quantum systems Authors:Heiko Georg Menzler, Rafał Świętek, Mari Carmen Bañuls, Fabian Heidrich-Meisner View a PDF of the paper titled Graph-theory measures capture weak ergodicity breaking on large quantum systems, by Heiko Georg Menzler and 3 other authors View PDF HTML (experimental) Abstract:We study the onset of weak ergodicity violations in closed quantum many-body systems and focus on cases in which they occur through a transition that is controlled by a model parameter. Our analysis is based on representing quantum systems in Fock space and utilizes graph-theoretical measures. As a main result, we show that the recently introduced graph-energy centrality captures known weak ergodicity-breaking transitions via characteristic changes in its distribution. While most numerical tools are limited to small system sizes, our measure can be calculated analytically for large systems of many hundreds of sites and in some cases, even in the thermodynamic limit. We conclude by demonstrating the applicability of our Fock-space based measure to a kinetically constrained quantum model, where we find evidence for a weak ergodicity-breaking transition accompanied by glassy dynamics. Comments: Subjects: Quantum Physics (quant-ph); Statistical Mechanics (cond-mat.stat-mech); Strongly Correlated Electrons (cond-mat.str-el) Cite as: arXiv:2605.00094 [quant-ph]   (or arXiv:2605.00094v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2605.00094 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Heiko Georg Menzler [view email] [v1] Thu, 30 Apr 2026 18:00:02 UTC (7,733 KB) Full-text links: Access Paper: View a PDF of the paper titled Graph-theory measures capture weak ergodicity breaking on large quantum systems, by Heiko Georg Menzler and 3 other authorsView PDFHTML (experimental)TeX Source v

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Scalable spin-nematic squeezing in multi-level dipole-interacting Rydberg atom arraysquantum-computing

Scalable spin-nematic squeezing in multi-level dipole-interacting Rydberg atom arrays

--> Quantum Physics arXiv:2605.00096 (quant-ph) [Submitted on 30 Apr 2026] Title:Scalable spin-nematic squeezing in multi-level dipole-interacting Rydberg atom arrays Authors:Sakshi Bahamnia, Thomas Bilitewski View a PDF of the paper titled Scalable spin-nematic squeezing in multi-level dipole-interacting Rydberg atom arrays, by Sakshi Bahamnia and Thomas Bilitewski View PDF HTML (experimental) Abstract:We study the generation of metrologically useful entanglement in a three-level (spin-1) system naturally realized in arrays of dipole-interacting Rydberg atoms confined in optical tweezers. In the spin-quadrupolar operator basis, the interaction Hamiltonian decomposes into effective SU(2) subspaces, within which quench dynamics from product initial states generate scalable spin-nematic squeezing. For symmetric interactions, we identify a mapping to effective one-axis twisting within bright and dark manifolds and demonstrate that the squeezing parameter scales as $\xi^{2}\propto N^{-2/3}$ ($\xi^{2}\propto N^{-0.5}$) with system size for all-to-all (two-dimensional dipolar) couplings. In both cases the quantum Fisher information reaches $F_Q\propto N^{2}$. For antisymmetric interactions supplemented by a microwave drive we find a distinct two-axis countertwisting mechanism. This results in squeezing $\xi^{2}\propto N^{-0.7}$ for all-to-all interactions and moderate squeezing for dipolar interactions in 2D. Our results constitute a first theoretical step beyond the well-studied qubit setting toward scalable entanglement generation in qudit systems with dipolar interactions, directly relevant to current Rydberg tweezer experiments. Comments: Subjects: Quantum Physics (quant-ph); Quantum Gases (cond-mat.quant-gas) Cite as: arXiv:2605.00096 [quant-ph]   (or arXiv:2605.00096v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2605.00096 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Sakshi Bahamnia [view email] [v1] Thu, 30

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