Frontier Signals

Daily brief

May 17, 2026.

60 quantum research items collected on 2026-05-17; hardware, control, and industry signals routed.

103 items · Quantum, Chips, Power · All briefs

Quantum

60 quantum research items collected on 2026-05-17; hardware, control, and industry signals routed.

Hardware and Error Correction

  • Non-Invertible Symmetries on Tensor-Product Hilbert Spaces and Quantum Cellular Automata

    We investigate realizations of (1+1)-dimensional fusion category symmetries on tensor-product Hilbert spaces, allowing for mixing with quantum cellular automata (QCAs). It was argued recently that any such realizable symmetry must be weakly integral. We develop a systematic analysis of QCA-refined realizations of fusion categories and prove two statements. First, we show tha...

  • Extensive long-range magic in non-Abelian topological orders

    We show that the low-energy states of non-Abelian topological orders possess extensive magic which is long-ranged, and cannot be eliminated by a constant-depth local unitary circuit. This refines conventional notions of complexity beyond the linear circuit depth which is required to prepare any topological phase, and provides a new resource-theoretic characterization of topo...

  • Energy efficiency of quantum computers

    How much energy does a quantum computer consume? Are they more efficient than their classical counterparts? In this work, we make a step towards answering these questions. We define the energy efficiency of a quantum computer as the ratio of the number of algorithms it can perform during a given time over the energy consumed by the hardware during this time. We analyze the m...

  • A Resource-Driven Framework for Configurable Entanglement in Quantum Networks

    Shared multipartite entanglement defines a ``whatever channel'', i.e., a latent communication substrate that does not determine a priori which end-to-end entangled links are activated, but can be configured to support different entanglement-connectivity graphs through Local Operations and Classical Communication (LOCC). Building on this, we propose a resource-driven framewor...

  • Quantum-Secure Physical Unclonable Function enabled by Silicon Photonics Integrated Circuits

    Physical Unclonable Functions (PUFs) are hardware security primitives whose inherent physical complexity can be exploited for secure authentication and cryptographic key generation. Silicon photonic devices, owing to their suitability for quantum and artificial intelligence applications alongside standard CMOS fabrication processes, constitute a highly promising substrate fo...

  • Nonlocal Topological Maxwell Demon Teleporting Ergotropy via Surface-Code Quantum Error Correction

    We introduce a nonlocal Maxwell demon teleporting ergotropy at finite temperature via classical communication and a shared surface code. The teleported ergotropy is exponentially protected below a topological threshold. We identify a thermodynamic phase transition separating a profitable demon phase from a thermal phase. A quadratic infrastructure cost strictly enforces the...

  • Superconducting single-photon detectors for integrated quantum photonics

    Single-photon detection possibility is a fundamental requirement for quantum technologies, including communication, computing and sensing. To achieve scalability and practical deployment, increasing attention is being directed toward integration of detectors with photonic integrated circuits, which offer compactness and compatibility with mass production. Superconducting nan...

  • Nonlinear Hamiltonians and Boolean satisfiability

    We consider an extended model of quantum computation where a scalable fault-tolerant quantum computer is coupled to one or more ancilla qubits that evolve according to a nonlinear Schrödinger equation. Following the approach of Abrams and Lloyd, an efficient quantum circuit evaluating an $n$-bit Boolean function in conjunctive normal form is used to prepare an ancilla encodi...

Control and Quantum-AI Integration

  • Quantum-enabled complete RF-polarimetry with an optically-wired atomic sensor

    Rydberg atomic electrometry leverages the extreme sensitivity of highly excited atoms for calibration-free electric field measurements. The technique uses a non-metallic vapor cell to link properties of an RF field to a spectroscopic readout in the optical domain. Most demonstrations have so far focused on detecting linearly-polarized fields, for which the induced splitting...

  • Stopping Reliability in Adaptive Krylov-Shadow Quantum Fisher Information Estimation

    Adaptive quantum Fisher information (QFI) estimation requires a stopping rule that distinguishes accuracy from apparent numerical stability. For Krylov-shadow QFI estimators, finite Krylov order $K$ produces truncation bias, while finite sample budget $M$ produces finite-$M$ sampling-side error. We show that a width-only empirical stopping rule, based on interval width and l...

Commercial and Industry Context

  • Rovibrational structure and electric dipole moments of the AcOCH$_3$+ ion

    The possibility of laser cooling and the presence of closely spaced rovibrational doublets make polyatomic molecules an attractive platform for the $\mathcal{P}$, $\mathcal{T}$-violation searches. We study the spectrum of the lowest rovibrational state of the AcOCH$_3+$ symmetric top molecule. The electronic structure full-electron computation was performed within a relativi...

  • Two Protons, Two Positrons, and Four Electrons: Covalent Bond with van der Waals Characteristics

    Classifying interactions is key in the physical sciences, and bonding mechanisms in matter-antimatter systems remain particularly enigmatic. Here we focus on a paradigmatic example of positronium hydride (PsH) dimer composed of two protons, two positrons, and four electrons, whose bonding nature has been previously described as either ionic, covalent, or van der Waals-like....

  • Toward Covert Quantum Computing

    As quantum computers become available through multi-tenant cloud platforms, ensuring privacy against adversaries sharing the same quantum processing unit becomes critical. We introduce and explore \emph{covert quantum computing}, a new concept that ensures an adversary with access to all other quantum computational units (QCUs) of a quantum computer cannot detect computation...

  • Podcast with Bob Sorensen, Chief Quantum Analyst, Hyperion Research

    <a href="https://thequantuminsider.com/2026/05/16/podcast-with-bob-sorensen-chief-quantum-analyst-hyperion-research/" rel="nofollow" title="Podcast with Bob Sorensen, Chief Quantum Analyst, Hyperion Research"><img alt="Bob Sorensen discusses quantum-HPC convergence" class="webfeedsFeaturedVisual wp-post-image" height="540" src="https://thequantuminsider.com/wp-content/upload...

  • NSF Announces $1.5 Billion X-Labs Initiative to Pursue Generational Breakthrough Science Efforts

    <a href="https://thequantuminsider.com/2026/05/15/nsf-announces-1-5-billion-x-labs-initiative-to-pursue-generational-breakthrough-science-efforts/" rel="nofollow" title="NSF Announces $1.5 Billion X-Labs Initiative to Pursue Generational Breakthrough Science Efforts"><img alt="X-Labs" class="webfeedsFeaturedVisual wp-post-image" height="1024" src="https://thequantuminsider.c...

  • Purdue Launches Comprehensive Quantum Degrees Program

    <a href="https://thequantuminsider.com/2026/05/15/purdue-launches-comprehensive-quantum-degrees-program/" rel="nofollow" title="Purdue Launches Comprehensive Quantum Degrees Program"><img alt="Purdue University - TQI" class="webfeedsFeaturedVisual wp-post-image" height="689" src="https://thequantuminsider.com/wp-content/uploads/2026/05/13as.png" style="display: block; margin...

  • QNu Labs Named Quantum Key Distribution Industry Leader

    <a href="https://thequantuminsider.com/2026/05/15/qnu-labs-global-quantum-key-distribution-leader/" rel="nofollow" title="QNu Labs Named Quantum Key Distribution Industry Leader"><img alt="QNu Labs logo - TQI" class="webfeedsFeaturedVisual wp-post-image" height="576" src="https://thequantuminsider.com/wp-content/uploads/2026/05/2026-05-15_13-10.png" style="display: block; ma...

Unrouted Items

  • Mixed-State Long-Range Entanglement from Dimensional Constraints

    We present a new mechanism for long-range entanglement (LRE) in strongly symmetric many-body mixed states that does not rely on symmetry anomalies or long-range correlations. Our primary example is the maximally mixed state in the translation-invariant subspace on a one-dimensional ring. This state is LRE because translationally symmetric short-range entangled states span a...

  • Translation symmetry-enforced long-range entanglement in mixed states

    We show by a counting argument that even though translation symmetry admits symmetric short-range entangled (SRE) eigenstates, there are not enough such SRE eigenstates to span the zero momentum sector. This means that the fixed point strong-to-weak spontaneous symmetry breaking state of translation symmetry is long-range entangled: it cannot be written as a mixture of SRE s...

  • Universal quantum resource distillation via composite generalised quantum Stein's lemma

    The performance of quantum resource manipulation protocols, including key examples such as distillation of quantum entanglement, is measured in terms of the rate at which desired target states can be produced from a given noisy state. However, to achieve optimal rates, known protocols require precise tailoring to the quantum state in question, demanding a perfect knowledge o...

  • New approaches to almost i.i.d. information theory

    Independent and identically distributed (i.i.d.) states are ubiquitous in quantum information theory. However, in a practical setting, the i.i.d. assumption is too stringent, and possibly not realistic. A physically more compelling class of 'almost i.i.d.' sources was recently proposed by [Mazzola/Sutter/Renner, arXiv:2603.15792]. In this paper, we introduce two alternative...

  • Scalable self-testing of generic multipartite quantum states

    Characterizing large quantum systems with minimal assumptions is a central challenge in quantum information science. Self-testing provides the strongest form of certification by identifying the underlying quantum state solely from observed measurement statistics. However, existing self-testing methods for generic $n$-partite states face a scalability barrier, requiring expon...

  • Accelerating State-Vector Quantum Simulation on Integrated GPUs via Cache Locality Optimization: A Cross-Architecture Evaluation

    The classical simulation of quantum algorithms is a crucial tool for circuit development, testing, and validation. Although acceleration using GPUs significantly reduces simulation time, most high-performance simulators rely on vendor-specific frameworks that target data-center hardware. To broaden access to quantum simulation, this work proposes a vendor-agnostic approach t...

  • Transient dynamics of parametric driving for single-electron image current detection in a Paul trap

    Nondestructive detection of single-electron motion is crucial for quantum information processing with electrons trapped in Paul traps. The standard approach in Penning traps is to detect the image current induced on the trap electrodes by the electron's oscillatory motion. However, applying this approach in Paul traps for single electrons is currently hindered by motional fr...

  • Deforming the Trail: Baseline Quantum Circuitry for $\text{SU(2)}_k$ Lattice Gauge Theory

    Quantifying quantum resources for simulating the fundamental forces of Nature is sensitive to the mapping of gauge fields onto finite quantum computational architectures. When locally truncating lattice gauge theories in the irreducible representation basis, it has been proposed to further deform the theory via quantum groups. The purpose of this deformation is (1) to provid...

  • Excitation Flow, Positivity, and Fisher Information for Open Subsystems of an $N$-Qubit Network

    We derive closed-form propagators for any $K$-qubit subsystem of a closed $N$-qubit network with a single conserved excitation. A single transition amplitude simultaneously controls excitation flow between subsystems, the positivity and complete positivity of every propagator, the entanglement entropy of every subsystem, and the quantum Fisher information for global paramete...

  • Majorana Constellations: A Geometric Lens on Multipartite Entanglement and Geometric Phases

    The Majorana stellar representation translates abstract quantum spin states into intuitive geometric constellations on the Bloch sphere, revealing symmetries, degeneracies, and correlations that traditional algebraic methods often obscure. Within quantum information science, this framework provides a powerful lens for characterizing symmetric multi-qubit and higher-spin syst...

  • Sharp Bounds on the Eigenvalues of Kikuchi Graphs and Applications to Quantum Max Cut

    We prove that the maximum eigenvalue of the (both signed and unsigned) Laplacian of level $k$ Kikuchi graph of any graph $G$ with $m$ edges is at most $m+k$. This confirms four recent conjectures of Apte, Parekh, and Sud. As applications, we obtain that tensor products of one and two qubit product states achieve an approximation ratio of $5/8$ for Quantum Max Cut and $5/7$ f...

  • Accurate Modeling of Rydberg Atoms and Their Interactions: Theory and Implementation in PairInteraction

    Rydberg atoms provide a powerful platform for exploring strongly interacting quantum systems, both in free space and in structured electromagnetic environments, with growing applications in quantum technology. Accurately modeling their single-atom properties and mutual interactions is essential for interpreting experiments and designing new architectures. We present a unifie...

  • Larkin-Ovchinnikov-Fulde-Ferrell state of spin polarized atomic Fermi superfluid on a spherical surface

    By implementing the Bogoliubov-de Gennes (BdG) formalism of population-imbalanced atomic Fermi gases with pairing interactions in a thin spherical shell, we characterize the Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) state in such a compact geometry. We first construct a phase diagram showing where uniform solutions of spin-polarized Fermi superfluid from the BdG equation cease...

  • QSeqSim: A Symbolic Simulator for Qiskit While Loops Using Sequential Quantum Circuits

    We present a tool QSeqSim, a Qiskit-integrated symbolic backend that fills the current gap of having no Qiskit-native support for simulating while-loop quantum programs and their induced sequential quantum circuits. QSeqSim takes Qiskit QuantumCircuit objects, translates them into OpenQASM 3 code, and organises the resulting program into a combination of combinational, dynam...

  • Efficient ultrafast homodyne detection of quantum light

    Ultrafast continuous-variable quantum states offer new opportunities for advanced quantum technologies, but efficient homodyne detection of these states remains challenging. Here, we present a method for efficient ultrafast homodyne detection by exploiting temporal correlations in detector signals. By optimizing the temporal weight used to extract quadrature outcomes, we ach...

  • The Heisenberg-Weyl-parity group its coherent states and a unified Wigner-Weyl function

    The Heisenberg-Weyl group $HW(d)$ related to a $d$-dimensional Hilbert space $H(d)$, is enlarged into the Heisenberg-Weyl-parity group $HWP(d)$ that incorporates parity transformations. It consists of $2d^3$ elements, of which $d^3$ elements belong to the $HW(d)$ subgroup, and extra $d^3$ elements which are related through a Fourier transform with the former ones. It is show...

  • Programmable cavity-enhanced telecom quantum memory in thin-film lithium niobate

    Spectrally multiplexed telecom quantum networks require quantum memories that combine efficient storage with programmable frequency addressing. An ideal integrated implementation should therefore unite a native telecom transition, efficient storage and fast on-chip spectral control. Here we demonstrate a cavity-enhanced quantum memory in an isotopically purified $^{167}\math...

  • Evolution of Gaussian mixed states under the Markovian master equation for a driven quantum oscillator

    We study a generic quantum Markovian master equation for a linearly displaced or driven harmonic oscillator. It was known that the displacement dynamics of Gaussian mixed states depends on the unitary part of the Liouvillian, the decay rate of the system but not on the bath temperature. Here we further show that the fast-rotating modes do not affect the system's displacement...

  • A Toolbox to Understand the Physics of Quantum Data Management

    The application of quantum computing to data management has attracted growing interest, yet remains constrained by a limited understanding of how the physical behaviour of quantum devices relates to the structure and difficulty of database problems. In particular, evaluating quantum annealing approaches for combinatorial optimisation, which is central to many data management...

  • Telecom-Wavelength-Compatible Quantum Information Transcription Using Nitrogen-Vacancy Centers

    Nitrogen-vacancy (NV) centers in diamond are a leading platform for solid-state quantum sensing and quantum information processing. While most optical studies rely on the visible fluorescence associated with the triplet transitions, the infrared singlet transition near $1042$ nm, which is typically considered dark within the singlet manifold of the NV optical cycle, provides...

  • Decoherence of $q-$Deformed Photon Added Coherent State

    In this study, we explore the behavior of photon added coherent states in a deformed harmonic oscillator subjected to dissipative decoherence. We use $q-$deformation as our nonlinear function to model our system. By adjusting the deformation parameter, we show that $q-$deformed photon added coherent state (DPACS) exhibit greater nonclassicality and resilience to decoherence...

  • Generating Non-Decomposable Maps with Differentiable Semidefinite Programming

    Positive maps that are not decomposable are a key resource in entanglement theory because they can detect bound entangled states, yet systematic methods for constructing them remain limited. We introduce an optimization framework based on differentiable semidefinite programming (SDP) for generating positive non-decomposable maps under flexible structural constraints on their...

  • Perfect transmission and parallel composition for quantum walks on graphs with two leads

    We study scattering for continuous-time quantum walks on finite graphs with two attached leads. We derive explicit formulae for the two-terminal scattering matrix in terms of characteristic polynomials of the finite graph and its vertex-deleted subgraphs. For real-weighted two-terminal graphs, we then introduce three real quantities, $μ_1$, $μ_2$, and $ν$, which are each add...

  • Are free choices absolute, when internalized in Wigner's friend?

    Wigner's thought experiment illustrates quantum theory's measurement problem by considering an observer who measures a quantum system inside a sealed lab, modeled unitarily by an outsider. Recent extensions of this thought experiment, referred to as extended Wigner's friend arguments, question how different observers can reason consistently about each other in quantum setups...

  • Discrete-phase-randomized mode-pairing quantum key distribution

    Mode-pairing quantum key distribution (MP-QKD) protocol achieves performance beyond the repeaterless rate-transmittance bound and exhibits excellent practicality by avoiding the requirement for difficult global phase locking. However, the source side of MP-QKD still relies on the assumption of continuous phase randomization, an experimentally infeasible requirement in practi...

  • Singular Asymptotics of SPADE in Quantum Source Discrimination

    We study far-field discrimination between one and two incoherent point sources in the singular regime of weak and closely spaced emitters. Under ideal alignment, spatial-mode demultiplexing (SPADE) attains the quantum-optimal large-sample Stein exponent, but the finite-photon behavior near the one-source boundary and the effect of realistic imperfections remain less understo...

  • Interference visibility as a witness of preparation contextuality via overlap inequalities

    We show that standard multi-path interferometry, using only pairwise visibility measurements, provides an operational route to tests of preparation noncontextuality. Under ideal symmetric conditions, interference visibility directly encodes state overlaps, without requiring tomography or SWAP tests. For three paths, any jointly diagonalizable (coherence-free) description mus...

  • Nonreciprocal magnon-magnon entanglement in a spinning cavity-magnon system

    Cavity-magnon systems, combining magnons and photons, offer a versatile platform for studying quantum entanglement and advancing quantum information science. In this work, we propose a scheme for generating nonreciprocal magnon-magnon entanglement in a hybrid system consisting of two yttrium iron garnet spheres coupled to a spinning whispering-gallery-mode cavity. By leverag...

  • Optimizing the preparation of Dicke states using counterdiabatic driving methods

    Recently, the technique of counterdiabatic driving, which provides an effective strategy for accelerating adiabatic quantum evolution, has been widely applied in the preparation of many-body quantum states. In this work, we propose a theoretical scheme for the efficient preparation of Dicke states in a system of non-interacting two-level atoms. Our approach leverages the one...

  • Model Checking Matrix Product States against Linear Chain Logic

    Matrix product states (MPS) are a standard tensor-network representation for ground states of one-dimensional quantum many-body systems, and they underpin widely used simulation tools such as DMRG. However, while quantum model checking has been developed mainly for quantum programs and communication protocols (with properties expressed along a time axis), there is still no c...

  • Sygaldry Raises $139 Million to Build Quantum Computers For AI

    <a href="https://thequantuminsider.com/2026/05/16/sygaldry-raises-139-million-to-build-quantum-computers-for-ai-2/" rel="nofollow" title="Sygaldry Raises $139 Million to Build Quantum Computers For AI"><img alt="Sygaldry" class="webfeedsFeaturedVisual wp-post-image" height="465" src="https://thequantuminsider.com/wp-content/uploads/2026/05/Screenshot-2026-05-16-at-8.41.34-AM...

  • Guest Post: Why Europe’s Quantum Future Depends on Talent Hubs, Not Just Tech Milestones

    <a href="https://thequantuminsider.com/2026/05/16/guest-post-why-europes-quantum-future-depends-on-talent-hubs-not-just-tech-milestones/" rel="nofollow" title="Guest Post: Why Europe’s Quantum Future Depends on Talent Hubs, Not Just Tech Milestones"><img alt="Vibrant orange lines and dots form an abstract network on a dark background, evoking technology and connectivity." cl...

  • Equal1 Unveils Hybrid Rack-Mounted Silicon-Spin Quantum Computer

    <a href="https://thequantuminsider.com/2026/05/15/equal1-unveils-hybrid-rack-mounted-silicon-spin-quantum-computer/" rel="nofollow" title="Equal1 Unveils Hybrid Rack-Mounted Silicon-Spin Quantum Computer "><img alt="RacQ" class="webfeedsFeaturedVisual wp-post-image" height="1024" src="https://thequantuminsider.com/wp-content/uploads/2026/05/Equal1-1.png" style="display: bloc...

Chips

42 chip stack items collected on 2026-05-17; memory, packaging, compute, and foundry signals routed.

Compute Accelerators

Memory and Advanced Packaging

  • Chiplets Need A New Workflow

    <p>Multi-die assemblies are facing full system-level challenges, but engineering teams need coordinated and repeatable ways to identify risks early and scale reliably. </p> <p>The post <a href="https://semiengineering.com/chiplets-need-a-new-workflow/">Chiplets Need A New Workflow</a> appeared first on <a href="https://semiengineering.com">Semiconductor Engineering</a>.</p>

  • Flash Getting Stacked High-Bandwidth Version

    <p>Inspired by HBM, HBF could improve AI efficiency in 3D flash memory.</p> <p>The post <a href="https://semiengineering.com/flash-getting-stacked-high-bandwidth-version/">Flash Getting Stacked High-Bandwidth Version</a> appeared first on <a href="https://semiengineering.com">Semiconductor Engineering</a>.</p>

Unrouted Items

Power

21 power layer items collected on 2026-05-17; data center load, grid, generation, and cooling signals routed.

Data Center Power Demand

  • Commercial electricity sales have soared in Virginia, driven by data centers

    Commercial electricity sales in Virginia increased by nearly 30.0 million megawatthours (MWh) between 2019 and 2025, much faster growth than in any other state except Texas, a much larger state, according to our Annual Electric Power Industry Report. The growth in sales of electricity in Virginia is largely driven by a concentration of data centers, as well as electric vehic...

  • Small modular reactors and microreactors under development in the United States

    Electric utilities in the United States currently operate about 98 gigawatts (GW) of nuclear generating capacity, but very little nuclear capacity has been built in the last few decades. High capital costs and lengthy licensing and approval processes have limited the expansion of nuclear power. However, several companies are developing new small modular reactor (SMR) designs...

  • U.S. coal-fired generating capacity retired in 2025 was the least in 15 years

    During 2025, the U.S. electric power sector retired 2.6 gigawatts (GW) of coal-fired generating capacity at four power plants, the least since 2010. At the beginning of 2025, coal plant operators had planned to retire 8.5 GW of capacity; however, 4.8 GW of planned retirements were delayed to a future year, and the operators of two coal plants (1.1 GW) cancelled plans to reti...

  • Rooftop solar photovoltaic systems account for 20% of Puerto Rico's capacity mix

    Rooftop solar generating capacity in Puerto Rico totaled 1,456 megawatts (MW) at the end of 2025, 20% of the overall capacity mix. Rooftop solar capacity has increased faster than other sources over the past decade. Between 2016 and 2025 rooftop solar installations accounted for 81% of the new generating capacity in Puerto Rico, according to data from our Electric Power Mont...

  • ENKA and GE Vernova mark the start of commercial operation of Türkiye’s first HA-powered plant

    Kırklareli, Türkiye -&nbsp;(May 12, 2026) ENKA and GE Vernova Inc (NYSE: GEV) today announced the start of commercial operations at the 852&nbsp;megawatts (MW) Kırklareli power plant in Kırklareli, about 20 miles from the Bulgarian border in Türkiye. The facility is the&nbsp;first HA-powered plant

Grid and Generation

Unrouted Items

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