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The Limits of Quantum Speed: Energy, Information, and Computation

13.11.2025 by pricpr

The study delineates a thermodynamic framework where initial correlations may exist between a heat bath, a system, and a memory, while a work source remains initially uncorrelated; interactions—$H\_{sb}$ between the system and bath, $H\_{sw}$ with the work source, $H\_{sm}$ with the memory, and $H\_{bm}$ between the bath and memory—define the system’s energetic landscape and potential for work extraction.

New research explores the fundamental trade-offs between energy dissipation, information processing, and the speed at which quantum systems can evolve.

Categories Science

Beyond Qubits: A New Yardstick for Quantum Memory

13.11.2025 by pricpr

Researchers have developed a weight-based measure to assess the practical capacity of quantum memory, linking it directly to real-world applications and performance limits.

Categories Science

Taming Quantum Chaos: A Stochastic Approach to Many-Body Dynamics

13.11.2025 by pricpr

The simulation tracks the stochastic variable $\rho_{ee}$ alongside the exact solution for excited state probability within a closed two-color maser, demonstrating that even with zero dissipation ($\gamma/f = 0$) and starting from the ground state, the system’s evolution—observed across both ten and one hundred atoms—reveals inherent probabilistic fluctuations alongside a deterministic trajectory.

New research critically examines the limits of simulating complex quantum systems using stochastic trajectories, revealing challenges in long-term stability.

Categories Science

Weaving Quantum Circuits with Exotic Particles

13.11.2025 by pricpr

The study demonstrates a quantifiable relationship between the power of entangling gates—specifically, their distance from perfect entanglers as defined by $Eq. (39)$ and $Eq. (27)$—and invariants of associated matrices plotted within a $g_1, g_2, g_3$ space, with data up to $L=35$ aligning alongside the boundaries of the perfect entangler section within the Weyl chamber.

Researchers have developed a new method for compiling quantum circuits using the unique properties of non-semisimple anyons in topological quantum computation.

Categories Science

Spooky Action at a Distance: Untangling Quantum Entanglement

13.11.2025 by pricpr

This review clarifies the methods used to detect and characterize entanglement, the bizarre quantum phenomenon that connects particles in ways classical physics cannot explain.

Categories Science

Untangling Gravity: A Quantum Testbed with Engineered Dissipation

13.11.2025 by pricpr

Simulations reveal distinctions in entanglement between quantum and classical gravity models, demonstrating that entanglement—absent in the conventional scheme below a mechanical quality factor $Q_m$ of $2.5 \times 10^{10}$—can be sustained through parameter adjustments, specifically by modulating pump beam amplitudes of $10^2$ and $2 \times 10^2$ Hz alongside a single-photon optomechanical coupling of 1 Hz, suggesting a pathway to observe quantum effects in gravitational systems.

Researchers propose a new experimental approach to differentiate between quantum and classical gravity by exploiting the unique properties of massive mechanical oscillators coupled to engineered reservoirs.

Categories Science

Where Quantum Meets Classical

13.11.2025 by pricpr

A new review explores the mathematical tools that connect the seemingly disparate worlds of quantum and classical physics.

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Echoes of Entanglement: Amplifying Quantum Correlations in Dynamic Media

13.11.2025 by pricpr

Entangled photon pairs are generated via spontaneous parametric down-conversion within a nonlinear crystal following illumination by a pump beam and subsequent diffusion, then directed toward a rotating diffuser and mirror system where coincidence events—detected by static and scanning single-photon detectors—reveal correlations dependent on the scattering angle $\theta_0$.

New research reveals how carefully controlling light scattering can significantly boost the strength of quantum correlations between photons, even in complex and rapidly changing environments.

Categories Science

Quantum Networks Get Personal: Smarter Anomaly Detection Through Federated Learning

13.11.2025 by pricpr

The quantitative framework for anomaly detection exhibits sensitivity to category boundaries, potentially misclassifying images outside a defined normal set—such as those depicting animals other than cats and dogs—as anomalous despite their inherent validity, thus highlighting a limitation in generalizing beyond the training distribution.

A new framework tailors quantum machine learning to individual network clients, boosting the accuracy of anomaly detection in diverse and complex systems.

Categories Science

Beyond Classical Limits: Optimizing Quantum Correlations

13.11.2025 by pricpr

New research demonstrates a gradient-based method for maximizing the quantum advantage in multipartite Bell inequality violations.

Categories Science
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