Spatiotemporal Light Pulses Could Secure Optical Communication by Masking Data
Ben‑Gurion University researchers have devised a secure optical‑communication scheme that embeds data within spatiotemporal optical vortices—light pulses whose structure conceals information from conventional detectors. The approach pairs these shaped pulses with a pre‑shared key and decoy‑signal algorithm, allowing only a synchronized receiver to reconstruct the message. Computer simulations demonstrate reliable transmission, noise resilience, and expanded data capacity, though the system remains at the theoretical‑simulation stage. The work aims to pre‑empt vulnerabilities introduced by emerging quantum‑computing attacks on traditional encryption.
Quantum Simulations Reveal Spin Transport in 1D Materials
Researchers at Oak Ridge’s Quantum Science Center used a 40‑qubit IBM Heron processor to perform the first digital quantum simulations of spin‑transport dynamics in a one‑dimensional Heisenberg model. The study captured ballistic, diffusive and super‑diffusive regimes and validated the results...
Multitasking Quantum Sensors Can Measure Several Properties at Once
MIT researchers have engineered a solid‑state quantum sensor based on nitrogen‑vacancy (NV) centers in diamond that can simultaneously measure multiple physical parameters at room temperature. By entangling two qubits within the sensor, the team extracted amplitude, frequency detuning, and phase...
Mirror-Positioning Method Could Make Quantum Gravity Tests Possible
Researchers at Kyushu University and Caltech have devised a method to boost gravity‑induced entanglement by creating a momentum‑squeezed state in an optomechanical cavity. By continuously measuring laser light and applying optimal filtering, the technique narrows the mirror’s momentum uncertainty while...
Using Atomic Nuclei Could Allow Scientists to Read Time More Precisely than Ever
Physicists have demonstrated a new way to probe the thorium‑229 nuclear transition by detecting internal‑conversion electrons rather than emitted photons. By depositing a thin thorium dioxide layer on a metal substrate and scanning a laser, they identified the precise excitation...
Physicists Discover How to Reverse 'Quantum Scrambling'
Physicists at UC Irvine have unveiled a method to reverse quantum scrambling, a process that spreads and seemingly loses information across qubits. By exploiting the microscopic time‑reversibility of quantum systems, the team engineered a precise backward‑evolution protocol that refocuses dispersed...
Unlocking Unusual Superconductivity in a Lightweight Element
Researchers at Penn State have demonstrated that a three‑atom‑thick gallium film sandwiched between graphene and a silicon‑carbide substrate exhibits Ising‑type superconductivity that endures magnetic fields far above the conventional Pauli limit. The interface‑engineered structure maintains superconductivity at in‑plane fields more...
High-Resolution Imaging Captures Cavity-Induced Density Waves in a Quantum Gas
Physicists have directly imaged cavity‑induced density‑wave order in a unitary Fermi gas using a high‑numerical‑aperture microscope that combines absorption imaging with real‑time photon detection. The technique captures the superradiant phase transition and reveals long‑range atom‑photon correlations across the cloud. This...
Universal Surface-Growth Law Confirmed in Two Dimensions After 40 Years
A Würzburg research team has delivered the first experimental verification of the Kardar‑Parisi‑Zhang (KPZ) universality class on two‑dimensional surfaces. By cooling a gallium‑arsenide semiconductor to –269.15 °C and injecting polaritons with a precision laser, they tracked spatial‑temporal growth that matches KPZ...
Robust Against Noise, Geometric-Phase Swap Gates Bring Stability to Quantum Operations
Researchers at ETH Zurich have demonstrated a geometric‑phase swap gate for neutral‑atom qubits that operates with 99.91% fidelity. The gate exchanges quantum states in under a millisecond and can be applied simultaneously to 17,000 qubit pairs. By relying on a...
Electron–Atom Scattering Encodes the Quantum State of Electron Wave Packets
A new theoretical analysis by RIKEN physicist Yuya Morimoto and collaborators shows that ultrashort, tightly focused electron wave packets imprint their quantum state onto scattering patterns when they encounter atoms. The study demonstrates that varying pulse width and other quantum...
Optical Control of Nuclear Spins in Molecules Points to New Paths for Quantum Technologies
Researchers at the Karlsruhe Institute of Technology have, for the first time, optically initialized, manipulated and read out nuclear spin states in a europium‑doped molecular crystal. By combining laser excitation with high‑frequency radio fields they achieved nuclear‑spin coherence times of...
Quantum Computing without Interruptions
Researchers from Innsbruck, Aachen, and partners have experimentally demonstrated a universal fault‑tolerant quantum algorithm that operates without any mid‑circuit measurements. Using a trapped‑ion processor, they executed Grover’s search on three logical qubits encoded across eight physical qubits. The new method...
Mechanical Inputs Boost Diamond Quantum Sensor States as Q Factor Tops One Million
UC Santa Barbara researchers have demonstrated a diamond optomechanical resonator with a mechanical quality (Q) factor exceeding one million at a 10‑gigahertz frequency, a record for diamond‑based devices. The resonator integrates a telecom‑frequency optical cavity and hosts nitrogen‑vacancy (NV) centers that serve...
Quantum Ground State of Rotation Achieved for the First Time in Two Dimensions
A team from the University of Vienna, TU Wien and Ulm University cooled the rotational motion of a levitated silica nanorotor to its quantum ground state in two orientational dimensions. The rotor, a dumbbell of two 150 nm silica spheres, reached...
