Quantum computing

The Quantum Journal

Your daily briefing on quantum computing breakthroughs, research, and industry news.

Latest Headlines

Industry

Qolab, IQCC Launch John Martinis Grants for Superconducting Qubit Research

Insider Brief PRESS RELEASE — In honor of the 2025 Nobel Prize in Physics, Qolab and IQCC are proud to announce the John Martinis Grants for Experimental Superconducting Device Physics. The goal of the program is to provide research and training resources to the next…

The Quantum Insider ·
Industry

IQM Opens First U.S. Quantum Technology Center in Maryland

Insider Brief PRESS RELEASE — IQM Quantum Computers, a global leader in superconducting quantum computing, and the Capital of Quantum (CoQ) announced today the establishment of IQM’s first U.S. Quantum Technology Center in Discovery District Maryland. This strategic…

The Quantum Insider ·
Industry

New Proposal Claims Quantum-Safe Bitcoin Without a Fork

Insider Brief Actually, don’t stick a fork in Bitcoin. While quantum computing poses a known threat to Bitcoin, a new proposal suggests the network could defend itself without changing its core protocol. In a recent paper, StarkWare researcher Avihu Mordechai Levy…

The Quantum Insider ·
Industry

Study Finds Exponential Quantum Advantage in Machine Learning Tasks

Insider Brief Small quantum computers could process massive datasets more efficiently than far larger classical systems, according to a study recently posted on arXiv that outlines a path to exponential gains in machine learning and data analysis. The study, conducted by…

The Quantum Insider ·
Industry

Overview of 15+ Key Quantum Sensing Companies – 2026

Insider Brief The quantum sensing sector has seen substantial investment and accelerating commercialization in recent years. Growth is driven by multiple converging factors such as increased government investment in quantum technologies, commercial viability of early-stage…

The Quantum Insider ·
Industry

University of Houston Hosts Quantum Symposium with Industry and IonQ

Insider Brief PRESS RELEASE — As part of its Quantum Initiative, the University of Houston convened global industry leader IonQ, national laboratory partners and energy executives for the symposium, “Powering the Future: Quantum Technologies in the Energy Economy,”…

The Quantum Insider ·
Research

Ten-Second Electron-Spin Coherence in Isotopically Engineered Diamond

arXiv:2604.07439v1 Announce Type: new Abstract: Solid-state spin defects are a promising platform for quantum networks. A key requirement is to combine long ground-state spin-coherence times with a coherent optical transition for spin-photon entanglement. Here, we investigate…

arXiv quant-ph ·
Research

When is randomization advantageous in quantum simulation?

arXiv:2604.07448v1 Announce Type: new Abstract: We study the regimes in which Hamiltonian simulation benefits from randomization. We introduce a sparse-QSVT construction based on composite stochastic decompositions, where dominant terms are treated deterministically and smaller…

arXiv quant-ph ·
Research

Operational criteria for quantum advantage in latency-constrained nonlocal games

arXiv:2604.07451v1 Announce Type: new Abstract: Remote entanglement enables coordinated decision making without communication and produces correlations beyond those achievable by any classical strategy, representing a practical quantum advantage in time-critical distributed…

arXiv quant-ph ·
Research

Quantum Simulation of Collective Neutrino Oscillations using Dicke States

arXiv:2604.07452v1 Announce Type: new Abstract: In dense neutrino gases, which exist for instance in supernovae, the flavour states of different neutrinos may become entangled with one another. The theoretical description of such systems may therefore call for simulations on a…

arXiv quant-ph ·
Research

Optimal Quantum State Testing Even with Limited Entanglement

arXiv:2604.07460v1 Announce Type: new Abstract: In this work, we consider the fundamental task of quantum state certification: given copies of an unknown quantum state $\rho$, test whether it matches some target state $\sigma$ or is $\epsilon$-far from it. For certifying…

arXiv quant-ph ·
Research

On Lorentzian symmetries of quantum information

arXiv:2604.07471v1 Announce Type: new Abstract: A foundational result in relativistic quantum information theory due to Peres, Scudo, and Terno, is that von Neumann entropy is not Lorentz invariant. Motivated by the "It from Qubit" paradigm, here we show that Lorentzian…

arXiv quant-ph ·
Research

Fermionic entanglement and quantum correlation measures in molecules

arXiv:2604.07633v1 Announce Type: new Abstract: We analyze fermionic entanglement and correlation measures in the ground and the low temperature thermal state of the water molecule as a function of the internuclear distance in the context of the full configuration interaction…

arXiv quant-ph ·
Research

Exponential quantum advantage in processing massive classical data

arXiv:2604.07639v1 Announce Type: new Abstract: Broadly applicable quantum advantage, particularly in classical data processing and machine learning, has been a fundamental open problem. In this work, we prove that a small quantum computer of polylogarithmic size can perform…

arXiv quant-ph ·
Research

Control-centric quantum noise spectroscopy of time-ordered polyspectra

arXiv:2604.07682v1 Announce Type: new Abstract: Precise environmental-noise characterisation in open quantum systems is a key step toward high-fidelity quantum control and targeted decoherence suppression in computing and sensing applications. Non-parametric quantum noise…

arXiv quant-ph ·
Research

Critical Entanglement Dynamics at Dynamical Quantum Phase Transitions

arXiv:2604.07714v1 Announce Type: new Abstract: We investigate the critical behavior of momentum-space entanglement entropy at dynamical quantum phase transitions (DQPTs) in translationally invariant two-band insulators and superconductors. By analyzing the Su-Schrieffer-Heeger…

arXiv quant-ph ·
Research

Complexity phase transition for continuous-variable cluster state

arXiv:2604.07804v1 Announce Type: new Abstract: Continuous-variable (CV) cluster states offer a promising platform for large-scale measurement-based quantum computations (MBQC). However, finite squeezing inevitably introduces Gaussian noise during MBQC. While fault-tolerant MBQC…

arXiv quant-ph ·
Research

Optimal noisy quantum phase estimation with finite-dimensional states

arXiv:2604.07828v1 Announce Type: new Abstract: Phase estimation in quantum interferometry is a major scenario where the quantum advantage is significantly revealed. Recently, the optimal finite-dimensional probe states (OFPSs) for phase estimation in two-mode quantum…

arXiv quant-ph ·
Research

Analysis of State Teleportation using Noisy Quantum Gates

arXiv:2604.07849v1 Announce Type: new Abstract: Noise is a major challenge in quantum computing, affecting the reliability of quantum protocols. In this work, we analytically study the impact of various noise processes, such as depolarization, bit flip, and phase flip, on the…

arXiv quant-ph ·
Research

Hardware-Aware Quantum Support Vector Machines

arXiv:2604.07856v1 Announce Type: new Abstract: Deploying quantum machine learning algorithms on near-term quantum hardware requires circuits that respect device-specific gate sets, connectivity constraints, and noise characteristics. We present a hardware-aware Neural…

arXiv quant-ph ·
Research

Hybrid Quantum--Classical k-Means Clustering via Quantum Feature Maps

arXiv:2604.07873v1 Announce Type: new Abstract: Clustering is one of the most fundamental tasks in machine learning, and the k-means clustering algorithm is perhaps one of the most widely used clustering algorithms. However, it suffers from several limitations, such as…

arXiv quant-ph ·
Research

Quantum Thermal Field Effect Transistor

arXiv:2604.07893v1 Announce Type: new Abstract: We propose and analyse a quantum thermal field-effect transistor (qtFET) composed of left-qubit, middle-qutrit, and right-qubit subsystems. In this architecture, the left qubit is coupled to the middle qutrit, which in turn…

arXiv quant-ph ·
Research

Non-variational supervised quantum kernel methods: a review

arXiv:2604.07896v1 Announce Type: new Abstract: Quantum kernel methods (QKMs) have emerged as a prominent framework for supervised quantum machine learning. Unlike variational quantum algorithms, which rely on gradient-based optimisation and may suffer from issues such as barren…

arXiv quant-ph ·
Research

Informational Mpemba Effect for Fast State Purification in Non-Hermitian System

arXiv:2604.07926v1 Announce Type: new Abstract: Quantum systems are inherently fragile to environmental fluctuations or decoherence, limiting their advantages in applications of quantum information and quantum computation. State purification offers a route to recover the purity…

arXiv quant-ph ·
Research

Quantum Property Testing for Bounded-Degree Directed Graphs

arXiv:2604.07954v1 Announce Type: new Abstract: We study quantum property testing for directed graphs with maximum in-degree and out-degree bounded by some universal constant $d$. For a proximity parameter $\varepsilon$, we show that any property that can be tested with…

arXiv quant-ph ·
Research

Harnessing dark states: coherent control in coupled cavity-Rydberg-atom systems

arXiv:2604.08023v1 Announce Type: new Abstract: The dark-state effect, caused by destructive interference, not only is an important fundamental research topic in atomic physics and quantum optics, but also has wide potential application in quantum physics and quantum information…

arXiv quant-ph ·
Research

Local Marking of Locally Implementable Unitary Operations

arXiv:2604.08054v1 Announce Type: new Abstract: We investigate the task of local marking for locally implementable unitary operations. In this setting, multipartite quantum unitary channels, chosen randomly from a known set, are distributed among spatially separated parties…

arXiv quant-ph ·
Research

Divide et impera: hybrid multinomial classifiers from quantum binary models

arXiv:2604.08094v1 Announce Type: new Abstract: We investigate how to combine a collection of quantum binary models into a multinomial classifier. We employ a hybrid approach, adopting strategies like one-vs-one, one-vs-rest and a binary decision tree. We benchmark each method,…

arXiv quant-ph ·
Research

Charging Quantum Batteries via Dissipative Quenches

arXiv:2604.08151v1 Announce Type: new Abstract: We investigate work extraction in open quantum batteries composed of interacting spin chains weakly coupled to engineered environments. Focusing on two- and four-qubit XX models initially prepared in thermal Gibbs states, we…

arXiv quant-ph ·
Research

Optimized Gottesman-Kitaev-Preskill Error Correction via Tunable Preprocessing

arXiv:2604.08247v1 Announce Type: new Abstract: The Gottesman-Kitaev-Preskill (GKP) code is a promising bosonic candidate for realizing fault-tolerant quantum computation. Among existing error-correction protocols for GKP code, the Steane-type scheme is a canonical and widely…

arXiv quant-ph ·
Research

QARIMA: A Quantum Approach To Classical Time Series Analysis

arXiv:2604.08277v1 Announce Type: new Abstract: We present a quantum-inspired ARIMA methodology that integrates quantum-assisted lag discovery with \emph{fixed-configuration} variational quantum circuits (VQCs) for parameter estimation and weak-lag refinement. Differencing and…

arXiv quant-ph ·
Research

Scalable Neural Decoders for Practical Fault-Tolerant Quantum Computation

arXiv:2604.08358v1 Announce Type: new Abstract: Quantum error correction (QEC) is essential for scalable quantum computing. However, it requires classical decoders that are fast and accurate enough to keep pace with quantum hardware. While quantum low-density parity-check codes…

arXiv quant-ph ·
Research

Sufficiency and Petz recovery for positive maps

arXiv:2604.08380v1 Announce Type: new Abstract: We study the interconversion of families of quantum states ("statistical experiments") via positive, trace-preserving (PTP) maps and clarify its mathematical structure in terms of minimal sufficient Jordan algebras, which can be…

arXiv quant-ph ·
Research

Rapid mixing for high-temperature Gibbs states with arbitrary external fields

arXiv:2604.08408v1 Announce Type: new Abstract: Gibbs states are a natural model of quantum matter at thermal equilibrium. We investigate the role of external fields in shaping the entanglement structure and computational complexity of high-temperature Gibbs states. External…

arXiv quant-ph ·
Research

Measurement-induced state transitions across the fluxonium qubit landscape

arXiv:2604.08515v1 Announce Type: new Abstract: Understanding the mechanisms that limit high-fidelity readout in circuit quantum electrodynamics is essential for its optimization. Multi-photon resonances are understood to be a limiting factor, causing population transfer from…

arXiv quant-ph ·
Research

A Quantum Spectral Method for Non-Periodic Boundary Value Problems

arXiv:2511.11494v2 Announce Type: cross Abstract: Quantum computing holds the promise of solving computational mechanics problems in polylogarithmic time, meaning computational time scales as $\mathscr{O}((\log N)^c)$, where $N$ is the problem size and $c$ a constant. We propose…

arXiv quant-ph ·
Research

An SU(2)-symmetric Semidefinite Programming Hierarchy for Quantum Max Cut

arXiv:2307.15688v3 Announce Type: replace Abstract: Understanding and approximating extremal energy states of local Hamiltonians is a central problem in quantum physics and complexity theory. Recent work has focused on developing approximation algorithms for local Hamiltonians,…

arXiv quant-ph ·
Research

Quantum convolutional channels and multiparameter families of 2-unitary matrices

arXiv:2312.17719v4 Announce Type: replace Abstract: Many alternative approaches to construct quantum channels with large entangling capacity were proposed in the past decade, resulting in multiple isolated gates. In this work, we put forward a novel one, inspired by convolution,…

arXiv quant-ph ·
Research

A shortcut to an optimal quantum linear system solver

arXiv:2406.12086v2 Announce Type: replace Abstract: Given a linear system of equations $A\boldsymbol{x}=\boldsymbol{b}$, quantum linear system solvers (QLSSs) approximately prepare a quantum state $|\boldsymbol{x}\rangle$ for which the amplitudes are proportional to the solution…

arXiv quant-ph ·
Research

Towards defending crosstalk-mediated attacks in multi-tenant quantum computing

arXiv:2409.14598v2 Announce Type: replace Abstract: With the increasing demand for quantum hardware, shared and multi-tenant environments have been proposed to optimize resource utilization. However, the multi-tenancy paradigm in quantum computing inherently introduces security…

arXiv quant-ph ·
Research

Clifford-Deformed Compass Codes

arXiv:2412.03808v2 Announce Type: replace Abstract: We can design efficient quantum error-correcting (QEC) codes by tailoring them to our choice of quantum architecture. Useful tools for constructing such codes include Clifford deformations and appropriate gauge fixings of…

arXiv quant-ph ·
Research

Nonlocality of Quantum States can be Transitive

arXiv:2412.10505v3 Announce Type: replace Abstract: As a striking manifestation of quantum entanglement, nonlocality has long played a pivotal role in shaping our understanding of the quantum world. When considering a Bell test involving three parties, we may even find a…

arXiv quant-ph ·
Research

Quantum Reservoir Computing for Realized Volatility Forecasting

arXiv:2505.13933v2 Announce Type: replace Abstract: Recent advances in quantum computing have demonstrated its potential to significantly enhance the analysis and forecasting of complex classical data. Among these, quantum reservoir computing has emerged as a particularly…

arXiv quant-ph ·
Research

Coherent error induced phase transition

arXiv:2506.00650v2 Announce Type: replace Abstract: We investigate the stability of logical information in quantum stabilizer codes subject to coherent unitary errors. Beginning with a logical state, we apply a random unitary error channel and subsequently measure stabilizer…

arXiv quant-ph ·
Research

Optimisation-Free Recursive QAOA for the Binary Paint Shop Problem

arXiv:2507.10908v2 Announce Type: replace Abstract: The Quantum Approximate Optimisation Algorithm (QAOA) is a leading candidate for near-term quantum advantage, yet its practical impact is hindered by limited performance on symmetric local Hamiltonians and the costly…

arXiv quant-ph ·
Research

Swap Network Augmented Ans\"atze on Arbitrary Connectivity

arXiv:2507.23679v3 Announce Type: replace Abstract: Efficient parametrizations of quantum states are essential for trainable hybrid classical-quantum algorithms. A key challenge in their design consists in adapting to the available qubit connectivity of the quantum processor,…

arXiv quant-ph ·
Research

Quantum recurrences and the arithmetic of Floquet dynamics

arXiv:2508.09933v2 Announce Type: replace Abstract: The Poincar\'e recurrence theorem shows that conservative systems in a bounded region of phase space eventually return arbitrarily close to their initial state after a finite amount of time. An analogous behavior occurs in…

arXiv quant-ph ·
Research

Quantum algorithms based on quantum trajectories

arXiv:2509.10425v2 Announce Type: replace Abstract: Quantum simulation has emerged as a key application of quantum computing, with significant progress made in algorithms for simulating both closed and open quantum systems. The simulation of open quantum systems, particularly…

arXiv quant-ph ·
Research

Correcting quantum errors using a classical code and one additional qubit

arXiv:2510.05008v3 Announce Type: replace Abstract: Classical error-correcting codes are powerful but incompatible with quantum noise, which includes both bit-flips and phase-flips. We introduce Hadamard-based Virtual Error Correction (H-VEC), a protocol that empowers any…

arXiv quant-ph ·
Research

Efficient Quantum State Preparation with Bucket Brigade QRAM

arXiv:2510.16149v2 Announce Type: replace Abstract: The preparation of data in quantum states is a critical component in the design of quantum algorithms. The cost of this step can significantly limit the realization of quantum advantage in domains such as machine learning,…

arXiv quant-ph ·
Research

Upper bounds on charging power and tangible advantage in quantum batteries

arXiv:2510.19552v2 Announce Type: replace Abstract: Quantum battery is expected to outperform its classical counterpart due to quantum effects. Usually, in a quantum battery made of $N$ cells, quantum advantage is demonstrated through super-extensive scaling of the upper bound…

arXiv quant-ph ·
Research

Direct temperature readout in nonequilibrium quantum thermometry

arXiv:2601.07198v3 Announce Type: replace Abstract: Quantum thermometry aims to measure temperature in nanoscale quantum systems, paralleling classical thermometry. However, temperature is not a quantum observable, and most theoretical studies have therefore concentrated on…

arXiv quant-ph ·
Research

Qubit Noise Sensing via Induced Photon Loss in a Superconducting Cavity

arXiv:2603.06848v2 Announce Type: replace Abstract: Characterizing noise in superconducting qubits is essential for improving coherence and gate performance. Conventional noise-sensing methods typically use the qubit itself as the sensor, which limits both accessible bandwidth…

arXiv quant-ph ·
Research

Computing logical error thresholds with the Pauli Frame Sparse Representation

arXiv:2603.14670v2 Announce Type: replace Abstract: We introduce a sparse classical representation, a truncation strategy and a shot-efficient sampling method to push the classical prediction of quantum error correction thresholds beyond Clifford operations and Pauli errors. As…

arXiv quant-ph ·
Research

The final version of a recent approach towards quantum foundation

arXiv:2604.05675v2 Announce Type: replace Abstract: In several articles, this author has advocated an alternative approach towards quantum foundation based upon a set of postulates, and based upon the notions of theoretical variables and of accessible theoretical variables. It…

arXiv quant-ph ·
Research

Separability and entanglement of resonating valence-bond states

arXiv:2212.11740v4 Announce Type: replace-cross Abstract: We investigate separability and entanglement of Rokhsar-Kivelson (RK) states and resonating valence-bond (RVB) states. These states play a prominent role in condensed matter physics, as they can describe quantum spin…

arXiv quant-ph ·
Research

Unitary and Open Scattering Quantum Walks on Graphs

arXiv:2409.08428v2 Announce Type: replace-cross Abstract: We study a class of Unitary Quantum Walks on arbitrary graphs, parameterized by a family of scattering matrices. These Scattering Quantum Walks model the discrete dynamics of a system on the edges of the graph, with a…

arXiv quant-ph ·
Research

Quantum-impurity sensing of altermagnetic order

arXiv:2508.04788v3 Announce Type: replace-cross Abstract: Quantum sensing with individual spin defects has emerged as a versatile platform to probe microscopic properties of condensed matter systems. Here we demonstrate that quantum relaxometry with nitrogen-vacancy (NV) centers…

arXiv quant-ph ·
Research

Optimizing two-qubit gates for ultracold fermions in optical lattices

arXiv:2512.03647v2 Announce Type: replace-cross Abstract: Ultracold neutral atoms in optical lattices are a promising platform for simulating the behavior of complex materials and implementing quantum gates. We optimize collision gates for fermionic Lithium atoms confined in a…

arXiv quant-ph ·
Research

Enhancing entanglement asymmetry in fragmented quantum systems

arXiv:2603.02338v2 Announce Type: replace-cross Abstract: Entanglement asymmetry provides a quantitative measure of symmetry breaking in many-body quantum states. Focusing on inhomogeneous $U(1)$ charges, such as dipole and multipole moments, we show that the typical asymmetry…

arXiv quant-ph ·
Research

Tunable information insulation induced by constraint mismatch

arXiv:2604.00732v2 Announce Type: replace-cross Abstract: We study a composite model of two $1D$ $PXP$ chains with dual constraints, forming a junction that acts as an infinite kinematic barrier to quantum information exchange. Moreover, the hard wall at the junction which acts…

arXiv quant-ph ·
Industry

Terra Quantum to Go Public in $3.25 Billion SPAC Merger

Terra Quantum AG, a St. Gallen-based leader in hybrid quantum-classical solutions, has signed a non-binding letter of intent (LOI) to go public through a business combination with Mountain Lake Acquisition Corp. II (Nasdaq: MLAA). The transaction values Terra Quantum at $3.25…

Quantum Computing Report ·
Industry

Qoro Quantum Secures $750,000 Pre-Seed to Orchestrate Hybrid Networks

Qoro Quantum, a London-based deep-tech startup, has raised $750,000 in pre-seed funding to address the integration bottleneck between classical and quantum computing. The round was led by Ada Ventures, with participation from Superangels Venture Fund and the Polsky Center for…

Quantum Computing Report ·
Industry

Terra Quantum AG to Go Public in $3.25 billion SPAC Deal

Insider Brief PRESS RELEASE — Terra Quantum AG (“Terra Quantum”), a leading quantum technology company, and Mountain Lake Acquisition Corp. II (“MLAC II”) (Nasdaq: MLAA), a special purpose acquisition company, today announced that they have signed a non-binding letter of…

The Quantum Insider ·
Industry

Cleveland Clinic Quantum Innovation Catalyzer Program Awardees Announced

Insider Brief PRESS RELEASE — The Cleveland Clinic Quantum Innovation Catalyzer Program announced its newest cohort of start-up company awardees advancing quantum computing applications in healthcare and life sciences. The competitive program selected three early- and…

The Quantum Insider ·
Industry

Infleqtion Announces 2026 Revenue Guidance of $40 Million

Insider Brief PRESS RELEASE — Infleqtion (NYSE: INFQ) (the “Company”) a global leader in quantum computing and quantum sensing powered by neutral-atom technology, today announced 2026 revenue guidance of $40 million in conjunction with its previously announced business…

The Quantum Insider ·
Industry

Riverlane Demonstrates Real-Time QEC Latency Performance Advancements

Riverlane, a developer of quantum error correction (QEC) technology, has released performance metrics for its second-generation Deltaflow 2 system, demonstrating a mean latency of 16.32µs. This result was achieved using data from Google’s 2024 "Willow" experiment, which involved…

Quantum Computing Report ·
Research

Electron–atom scattering encodes the quantum state of electron wave packets

A new analysis reveals what happens when very short or narrow electron beams encounter a particle. The research is published in the New Journal of Physics. Scientists should be able to achieve a new level of control over high-energy electrons interacting with a particle,…

Phys.org Quantum ·
Research

Quantum computing without interruptions

Mid-circuit measurements are one of the biggest practical hurdles in quantum error correction on encoded qubits. Researchers in Innsbruck and Aachen have now proposed and experimentally demonstrated that a universal fault-tolerant quantum algorithm can be executed without such…

Phys.org Quantum ·
Research

Quantum ground state of rotation achieved for the first time in two dimensions

Quantum mechanics tells us that a particle can never be perfectly still. But how precisely can it be oriented? A research team at the University of Vienna, together with colleagues at TU Wien and Ulm University, has now cooled the rotational motion of a levitated silica…

Phys.org Quantum ·
Research

Electrons in moiré crystals explore higher-dimensional quantum worlds

The electrons that power our society flow left and right through the circuitry in our electronics, back and forth along the transmission lines that make up our power grid, and up and down to light up every floor of every building. But the electrons in newly discovered "moiré…

Phys.org Quantum ·
Research

A tiny detector for microwave photons could advance quantum tech

Detecting a single particle of light is hard; detecting a single microwave photon is even harder. Microwave photons, the tiny packets of electromagnetic radiation used in current technologies like Wi-Fi and radar, carry far less energy than visible light. They are about 100,000…

Phys.org Quantum ·
Research

Quantum coherence could be preserved at large scales in realistic environments

Quantum states are notoriously fragile, and can be destroyed simply through interactions, measurements, and exposure to their surrounding environments. In a new theoretical study published in Physical Review X, Rohan Mittal and colleagues at the University of Cologne have…

Phys.org Quantum ·
Research

How noise limits today's quantum circuits

Imagine you're trying to build a very long, complicated chain of dominoes. The aim is that each domino hits the next one perfectly, all the way down the line, producing an amazing result at the end. A quantum circuit is like a domino chain: a long chain of tiny steps…

Phys.org Quantum ·
Research

Ultrafast quantum light pulses measured for the first time

Researchers at the Technion—Israel Institute of Technology have, for the first time, measured the temporal duration of individual pulses of an extraordinary form of quantum light known as bright squeezed vacuum (BSV). Their findings are published in Optica.

Phys.org Quantum ·
Research

Pairs of atoms observed existing in two places at once for the first time

Quantum physicists at ANU have observed atoms entangled in motion. "It's really weird for us to think that this is how the universe works," says Dr. Sean Hodgman from the ANU Research School of Physics. "You can read about it in a textbook, but it's really weird to think that a…

Phys.org Quantum ·
Research

Quantum researchers engineer extremely precise phonon lasers

When lasers were invented in the 1960s, they opened new avenues for scientific discovery and everyday applications, from scanners at the grocery store to corrective eye surgery. Conventional lasers control photons—individual particles of light—but over the past 20 years,…

Phys.org Quantum ·
Research

Silicon quantum computer performs logical operations for the first time

Silicon is ubiquitous in modern electronics, and now it is becoming increasingly useful in quantum computing. In particular, silicon's compatibility with existing chip technology and its long coherence times in silicon-based spin qubits make it a promising material for scalable…

Phys.org Quantum ·
Research

Framework unifies the classical and quantum Mpemba effects

Physicists have developed a new theoretical framework which unifies a wide array of seemingly unrelated "Mpemba effects": counterintuitive cases where systems driven further from equilibrium relax faster than those closer to it. Reporting their results in Physical Review X,…

Phys.org Quantum ·
Research

A universal scheme can verify any quantum state

Quantum technologies, devices that can process, store, or detect information leveraging quantum mechanical effects, could outperform classical devices in some tasks or scenarios. Despite their potential, verifying that these devices work correctly and truly realize desired…

Phys.org Quantum ·