Science – Page 123

Faster Cooling with Quantum Quirks

18.11.2025 by pricpr

New research reveals how manipulating quantum dynamics can accelerate the cooling of systems, defying conventional thermal expectations.

Squeezing More Information from Quantum Signals

18.11.2025 by pricpr

$The study introduces a probe state protocol utilizing a single-mode Gaussian state initially prepared in a thermal state with inverse temperature $ \beta $, subjected to sequential Gaussian measurements in position with uncertainty $ \sigma_{q} $ and momentum with uncertainty $ \sigma_{p} $, before interacting with a Gaussian channel parameterized by $ \vec{\theta} $ to interrogate specific channel characteristics.$

New research demonstrates how carefully chosen quantum measurements can boost the precision of parameter estimation in noisy communication channels.

Can AI Now Do Quantum Physics?

18.11.2025 by pricpr

A new system demonstrates the potential for artificial intelligence to independently design and execute experiments in the complex world of quantum mechanics.

Beyond the Test Suite: Smarter Benchmarks for Real-World Optimization

18.11.2025 by pricpr

A new perspective on benchmarking calls for moving beyond idealized problems to focus on curated, feature-rich landscapes that better reflect the challenges of practical optimization tasks.

Taming Quantum Noise: Controlling Entanglement in Real-World Systems

18.11.2025 by pricpr

$The study demonstrates that the dynamics of quantum correlations - specifically Negativity, Quantum Discord, and QM-Assisted Entropic Uncertainty - are acutely sensitive to qubit energy splitting, transitioning between markedly different behaviors in weak-coupling ($\epsilon = 0.01$) and strong-coupling ($\epsilon = 5.0$) regimes, as simulated with parameters $J_{zz} = J_{xx} = 0.5$, $\gamma_{amp} = \gamma_{deph} = 0.01$, $G = 0.01$, and a driving pulse of amplitude $A_{pulse} = 1.0$ centered at $t = 15$, when initialized from either a Bell state or a separable state.$

New research demonstrates how carefully shaped pulses can protect and manipulate quantum correlations-like entanglement and quantum discord-even in the presence of disruptive environmental noise.

Decoding the Quantum Realm: Limits to Channel Identification

18.11.2025 by pricpr

New research establishes fundamental limits on how accurately we can distinguish and estimate quantum channels, crucial for secure communication and quantum technologies.

Cosmic Friction: How Galaxy Surveys Will Probe Dark Matter’s Hidden Properties

17.11.2025 by pricpr

The study demonstrates that viscous dark matter exhibits suppressed growth of density contrast relative to baryons, as numerically solved from Eqs. (106) and (107) at $k=0.05$ and $k=0.12$ hh/Mpc, with analysis focused solely on bulk viscosity under the conditions $Θ=Γ=0, μ_G=η=1$.

New research suggests upcoming astronomical observations can reveal the subtle effects of ‘cosmic friction’ within dark matter and test the fundamental principles of gravity.

Quantum Oscillators Fall into Step: Synchronization Revealed by Measurement

17.11.2025 by pricpr

New research shows that quantum and classical oscillators exhibit strikingly similar synchronization patterns when continuously observed, challenging traditional notions of quantum behavior.

Electrons as Qubits: Towards Ultrafast Quantum Computation

17.11.2025 by pricpr

$Ultrafast quantum gates manipulating electron populations on momentum sidebands are demonstrated via coherent light interaction, achieving a $\pi$-pulse in 43.3 fs with 0.994 fidelity for a 100 eV electron and a dispersive iSWAP gate in 7.81 ps with 0.991 fidelity, both sustained by strong vacuum field amplitudes near $7.5 \times 10^6$ V/m and validating the Jaynes-Cummings and Tavis-Cummings models even with increased field strength.$

A new theoretical framework harnesses the quantum properties of free electrons and their interaction with light to design exceptionally fast and scalable quantum gates.

Entangled Light Bridges the Distance for Next-Gen Telescopes

17.11.2025 by pricpr

Researchers have demonstrated a quantum interferometer leveraging entanglement over a 20km fiber link, paving the way for significantly enhanced astronomical imaging capabilities.