Science – Page 109 – Investment Policy

Quantum Learning’s Noise Barrier

12.12.2025 by Ray Dalio

$Quantum learning, in its idealized form, presupposes access to a noiseless oracle via a quantum computer, formalized as $BQPO\textsf{BQP}^{O}$, but practical implementation necessitates navigating the complexities of noisy, fault-tolerant systems where errors occur at the physical-qubit level and are modeled by $NBQPO\textsf{NBQP}^{O}$.$

New research clarifies the limits of near-term quantum computers for machine learning tasks and highlights the crucial role of error correction.

Bridging the Quantum Divide: Integrated Classical and Quantum Networks

12.12.2025 by Ray Dalio

The envisioned wireless networks of the future demand a convergence of classical and quantum communication channels, acknowledging that any architecture built today inevitably seeds the conditions of its own eventual limitations.

This review examines the potential of combining classical and quantum communication channels to build more efficient and secure Space-Air-Ground Integrated Networks.

Untangling Quantum Errors with the Donut

12.12.2025 by Ray Dalio

Decoding topological codes reveals regimes-Path-Counting, Ordered, Critical, and Disordered-mirroring those of associated classical statistical mechanics models, such as the $±J$ random-bond Ising model, and dictated by the interplay between physical error rate and code distance, ultimately defining the functional behavior of logical errors and consequences for quantum error correction.

A new analysis leverages the geometry of the torus to map out the performance limits of a leading quantum error correction code.

The Limits of Edge Partitioning: A New Barrier for Approximation Algorithms

12.12.2025 by Ray Dalio

The functions $r_1$, $r_2$, and $r_3$, as defined by equations 20, 22, and 26 respectively, demonstrate specific values that characterize the system’s behavior under investigation.

Researchers have identified a fundamental limit of 0.873 for approximating solutions to the Edge Partitioning Problem, suggesting that significant algorithmic advancements are required to achieve better results.

Guarding the Genome: A Security Deep Dive into DNA Synthesis Screening

11.12.2025 by Ray Dalio

SecureDNA distributes trust across distinct roles, each safeguarding cryptographic variables, acknowledging that any system’s security ultimately rests not in impenetrable defenses, but in the careful choreography of inevitable vulnerabilities.

A new analysis exposes potential vulnerabilities in SecureDNA, a biosecurity platform used to vet DNA orders, and outlines improvements based on rigorous formal methods.

Secure Randomness from Space: A Quantum Leap for Key Distribution

11.12.2025 by Ray Dalio

For the SPOQC mission, a coherent communication system utilizes Gaussian modulated states-created via amplitude and phase modulation-transmitted to an optical ground station, with a portion of the signal and local oscillator directed to a quantum random number generator receiver module via a beam-splitter, and detected by a homodyne detector.

Researchers have successfully demonstrated a satellite-based quantum random number generator, paving the way for truly secure communication in orbit and beyond.

Fragile Shields: Cracking Low-Cost Anti-Counterfeiting Tech

11.12.2025 by Ray Dalio

Despite demonstrated potential for counterfeit prevention, this work identifies critical security vulnerabilities within state-of-the-art paper-based authentication systems that leverage the intricate microstructures - visualized through techniques like topographical mapping and confocal microscopy - inherent in paper as a form of physical unclonable function (PUF).

New research reveals significant vulnerabilities in paper-based Physically Unclonable Functions (PUFs) used for authentication, despite their promise as a cost-effective defense against counterfeiting.

Quantum Luck: Building Truly Random Numbers on Real Hardware

11.12.2025 by Ray Dalio

New research rigorously tests the performance of quantum random number generators on the IQM Spark 5 quantum processing unit, offering insights into optimal circuit designs.

The Illusion of Security: Why AI Safety Research Needs a Checkup

11.12.2025 by Ray Dalio

A new analysis reveals widespread flaws in how the security of large language models is tested, undermining confidence in current safety evaluations.

Shared Secrets, Securely: A New Twist on Quantum Cryptography

11.12.2025 by Ray Dalio

The relationships between three users-Alice, Bob, and Charlie-are delineated by a matrix wherein Alice’s measurement bases form the rows, Bob’s constitute the columns, and the resulting values, representing Charlie’s measurement outcomes, populate the corresponding cells.

Researchers have developed a simplified device-independent quantum secret sharing protocol leveraging a multi-party pseudo-telepathy game to enhance secure communication.