1714 matching published research entries
Science · 2026-10-26
A solar eclipse recorded more than 2,700 years ago is revealing surprising secrets about Earth's rotation and the Sun's ancient behavior. By correcting an eight-kilometer error in the location of an ancient Chinese capital, scientists were able to reconstruct a total solar eclipse that occurred in 709 BCE and obtain more accurate measurements of how fast Earth was spinning at the time.
ScienceDailyRead article →Science · 2026-10-26
Regular exercise does more than strengthen the heart. New research reveals that it actually reshapes the nerves controlling how the heart functions, and the changes are surprisingly different on the left and right sides of the body.
ScienceDailyRead article →Mathematics & Physics · 2026-10-26
A new topological model connects a centuries-old voting paradox to a surface with no distinct inside or outside. The post How Voting Is Like a Klein Bottle first appeared on Quanta Magazine
Quanta MagazineRead article →Space & Discovery · 2026-10-26
Description This 360-degree look at Neretva Vallis within Mars’ Jezero Crater was stitched together using 217 images acquired by the rover’s Mastcam-Z on May 20, 2024, the 1,155th Martian day, or sol, of the mission. While it is a wind-swept dusty vista today, billions of years ago it was home to a river channel that fed fresh water into […]
NASARead article →Quantum Research · 2026-10-26
arXiv:2610.32595v1 Announce Type: new Abstract: This compendium presents a structured collection of computational problems with credible prospects for realizing meaningful quantum advantage, focused on describing problem characteristics rather than specific algorithms.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32585v1 Announce Type: new Abstract: Very recently, Mahanti et al. (arXiv:2609.18735) introduced the observational ergotropic advantage, which gives the maximum value of extra work that a measurement can obtain with respect to all incoherent measurements. However, the above quantity does not show monotonic behaviour under the resource theory of measurement coherence.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32571v1 Announce Type: new Abstract: Scaling parametrized quantum circuits to a larger number of qubits is a central challenge in Quantum Machine Learning: gradient estimation via the parameter-shift rule quickly becomes prohibitively expensive, while gradient-free optimizers offer limited convergence guarantees.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32541v1 Announce Type: new Abstract: We study the estimation of detuning and intrinsic loss in a lossy whispering-gallery-mode (WGM) resonator located in a balanced Mach--Zehnder interferometer. We use indistinguishable photon pairs and coherent-state probes.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32518v1 Announce Type: new Abstract: We introduce LYNX, a quantum information processor based on trapped $^{40}$Ca$^+$ ions. It utilizes up to 31 qubits with all-to-all connectivity. We characterize the system performance using rigorous benchmarks, such as randomized benchmarking (RB), GHZ state fidelity estimates, and quantum volume (QV) tests.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32428v1 Announce Type: new Abstract: Quantum secret sharing (QSS) schemes can be constructed from quantum error-correcting codes, but characterizing their access structures and implementation costs becomes challenging for finite-length, high-rate quantum low-density parity-check (qLDPC) codes. We develop an exact computational framework for QSS induced by CSS qLDPC codes.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32368v1 Announce Type: new Abstract: State purity is a key resource for experimental tests of quantum mechanics with massive objects. Cavity cooling of a levitated nanoparticle via coherent scattering stands out as a strategy to prepare highly pure states of its roto-translational motion.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32347v1 Announce Type: new Abstract: We demonstrate high-fidelity logical qubit operations using \texttt{ibm\_phoenix}, a square-lattice array of 120 coupled superconducting qubits that are capable of fast reset. Using strategies to exclude underperforming components together with noise informed decoding, we routinely produce surface codes at distance-3 and distance-5 with logical error per round below…
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32319v1 Announce Type: new Abstract: A longstanding question in Bell nonlocality is whether finite-alphabet nonsignalling resources can reproduce the continuum of measurement correlations of partially entangled qubits. Here we resolve this problem by showing that every fixed pure two-qubit state admits an exact simulation of all local projective-measurement statistics using shared randomness and finitely…
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32315v1 Announce Type: new Abstract: Beyond quadratic potentials, classical evolution laws are typically thought to arise from quantum theory as an approximate description. Here we show that classical evolution laws can emerge exactly, provided the environment interacts with the system via collisions.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32292v1 Announce Type: new Abstract: Quantum sensing in the infrared regime often demands the use of expensive and cryogenically operated detectors. Nonlinear interferometry has paved the way for information transfer from the infrared to the near--infrared or visible regime in various quantum technologies.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32287v1 Announce Type: new Abstract: Self-assembled two-dimensional molecular aggregates provide a versatile platform for engineering excitonic states, including topologically nontrivial edge states. However, these edge-states are difficult to probe optically: they have weak far-field transition strengths, and far-field spectra do not reveal whether an excitation is localized at the edge.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32267v1 Announce Type: new Abstract: Encoded magic states are essential for universal fault-tolerant quantum computation, but their resource-efficient preparation in high-rate quantum codes remains challenging. To address this limitation, we propose two-layer verification, which combines local verification of independently prepared subblocks with logical verification after their embedding into a target…
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32227v1 Announce Type: new Abstract: Quantum subroutines, like their classical counterparts, serve as essential components of larger algorithms. They can be realized using gate based architectures or measurement based quantum computation (MBQC), where computation proceeds through adaptive measurements on highly entangled cluster states.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32218v1 Announce Type: new Abstract: Quantum secret sharing protects distributed quantum information against unauthorized reconstruction, yet existing schemes provide no intrinsic accountability when shares are leaked or forged.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32209v1 Announce Type: new Abstract: We develop a bosonic Bogoliubov description of Zitterbewegung in time-dependent optical-Dirac systems. Within the optical-Dirac framework, the anomalous pair-creation and pair-annihilation terms of a bosonic Bogoliubov Hamiltonian correspond to couplings between the positive- and negative-frequency sectors, whose coherence underlies the Zitterbewegung response.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32156v1 Announce Type: new Abstract: Predicting and controlling driven quantum systems requires access to dynamics across physical parameters, initial states, and evolution times. A reusable neural model must capture this dependence while preserving unitary structure and maintaining accuracy over long-time coherent evolution.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32154v1 Announce Type: new Abstract: Measurements of photon-number-dependent time-of-arrival (TOA) distributions in wide NbN superconducting microstrip single-photon detectors (SMSPDs) are presented. Two \SI{10}{\um}-long devices with widths of \SI{3.2}{\um} and \SI{6.4}{\um} are characterized under pulsed \SI{515}{nm} excitation.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32152v1 Announce Type: new Abstract: Fault-Tolerant Quantum Computers (FTQCs) commonly use the surface code to encode program qubits as error-corrected logical qubits. Unfortunately, the surface code has a poor encoding rate, so recent work has proposed Yoked Surface Codes (YSCs), which concatenate the surface code with a high-rate quantum code.
arXiv QuantumRead article →Quantum Research · 2026-10-26
arXiv:2610.32145v1 Announce Type: new Abstract: In classical cryptography, one-way functions are necessary for most of cryptography. In the quantum world, however, Kretschmer at {TQC'21} and subsequent works have demonstrated that quantum versions of various primitives in minicrypt, such as signatures and private-key encryption, do not require quantum-computable one-way functions (\textsf{qOWF}s).
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