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Entangled Photons Get a Multiplexing Boost

23.12.2025 by Ray Dalio

The experiment demonstrates manipulation of optical pulse phase via a spectral shearing phase modulator employing a triangle waveform, achieving maximum positive, zero, and maximum negative frequency shifts contingent on precise alignment between the optical pulses and the radio frequency drive.

A new technique dramatically increases the rate of quantum communication by efficiently combining multiple entangled photon channels without signal loss.

Categories Science

Beyond Single Proposers: A New Approach to Blockchain Transaction Dissemination

23.12.2025 by Ray Dalio

For a system designed to withstand censorship-with parameters including $n=256$, a censorship rate of $c_{e}/n=0.125$, and a failure probability of $\delta=10^{-9}$-replication factors utilizing Sedna’s multi-dimensional scaling and rateless techniques demonstrate comparable resilience to naive replication, suggesting alternative approaches needn't sacrifice protection against data loss or manipulation.

Sedna introduces a novel protocol leveraging verifiable rateless coding to efficiently and securely distribute transactions across multiple concurrent proposer blockchains.

Categories Science

Locking Down Language Models: A New Approach to Secure AI Access

22.12.2025 by Ray Dalio

Researchers have developed a novel gating mechanism that restricts language model usage to authorized users, preventing unauthorized access and malicious outputs.

Categories Science

Quantum Key Distribution Gets a Timing Boost

22.12.2025 by Ray Dalio

Optical signals, when pushed beyond their inherent limits, exhibit a predictable cascade into desynchronization, demonstrating that even the most precisely timed systems are vulnerable to disruption when stressed beyond capacity.

A new algorithm achieves picosecond synchronization for secure quantum communication without relying on traditional, vulnerable hardware.

Categories Science

Quantum Routes: Smarter Encoding for the Traveling Salesman

22.12.2025 by Ray Dalio

For the 4-city Traveling Salesman Problem, the runtime of the Quantum Approximate Optimization Algorithm (QAOA) scales with the number of layers in its ansatz, and this performance is demonstrably affected by the chosen encoding scheme-whether based on edges or nodes-suggesting a crucial relationship between problem representation and algorithmic efficiency.

Researchers have developed new methods for representing the classic Traveling Salesman Problem on quantum computers, potentially unlocking faster solutions with fewer qubits.

Categories Science

Wavelength Division Multiplexing Powers Quantum Network Scale-Up

22.12.2025 by Ray Dalio

A fully connected quantum key distribution (QKD) network-capable of simultaneous, untrusted communication between multiple users-is demonstrated, relying on measurement-device-independent protocols and massively parallel frequency-locked laser arrays, and experimentally validated over 200km using silicon photonics to overcome the substantial technical challenges inherent in scaling such a system.

Researchers have demonstrated a fully connected quantum key distribution network leveraging integrated photonics and silicon microcombs to dramatically increase connection capacity.

Categories Science

Scaling Quantum Computing with Millimeter-Wave Control

22.12.2025 by Ray Dalio

A meticulously designed on-chip architecture integrates frequency-multiplexed superconducting qubits with a space-time-modulated frequency multiplier, establishing a nonreciprocal control bus that not only isolates qubits to minimize energy loss and interference but also enables scalable, fault-tolerant quantum computation through precise, harmonic frequency tuning of each qubit’s superconducting quantum interference device (SQUID) loop via a dedicated direct current bias.

Researchers have unveiled a new superconducting qubit architecture that overcomes key limitations in coherence and crosstalk, paving the way for larger, more reliable quantum processors.

Categories Science

Quantum Boost for Fraud Detection

22.12.2025 by Ray Dalio

Classical, simulated annealing, and quantum-annealing training methods yielded peak performance at epochs 25, 34, and 49 respectively, demonstrating that while all three approaches converge, their optimization timelines and, potentially, underlying search landscapes differ significantly, as evidenced by the limited data available from the D-Wave system for quantum annealing.

New research explores how quantum annealing can accelerate and improve machine learning models used to identify fraudulent credit card transactions.

Categories Science

Cracking the Code: AI Watermarks Face New Threats

22.12.2025 by Ray Dalio

A new analysis reveals vulnerabilities in the pseudorandom error-correcting codes used to protect AI-generated content, potentially undermining efforts to track its origin.

Categories Science

Securing the Vote: A Quantum-Resistant E-Voting System

22.12.2025 by Ray Dalio

The system details communication flow within the $Voting\ Phase$ of the E2E-PQ-EVot framework, illustrating how decisions are propagated and tallied during the voting process.

Researchers have developed a new end-to-end verifiable e-voting protocol designed to withstand the threat of quantum computers and ensure secure, transparent elections.

Categories Science
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