Science – Page 53 – Investment Policy

Quantum Circuits Predict Financial Volatility

12.12.2025 by Ray Dalio

A new approach leverages quantum circuit learning to model complex patterns in financial markets, offering a potential advantage over traditional time series analysis.

Quantum Networks Beat Isolation: A Path to Scalable Computing

12.12.2025 by Ray Dalio

$A distributed quantum processing unit (QPU) architecture integrates three modules-$QPU_k$-and connects them to neighboring units, $QPU_{k\pm 1}$, establishing a network for enhanced computational capacity.$

New research shows that linking smaller quantum processors, even with slow connections, can unlock performance gains over building a single, larger machine.

Shielding the Grid: Quantum Machine Learning Fortifies Power System Stability

12.12.2025 by Ray Dalio

The QSTAformer architecture anticipates eventual failure through its design, embedding a query-state transformer to model long-range dependencies within sequential data-a necessary compromise given the inherent limitations of any attempt to perfectly capture complex system dynamics with a finite model, represented as $Q$, $S$, and $T$ within the transformer blocks.

A new approach leverages quantum-enhanced transformers and adversarial training to protect power grids from cyberattacks that threaten short-term voltage stability.

Securing the 6G Future: Quantum AI and Blockchain Collide

12.12.2025 by Ray Dalio

The proposed QFLchain framework establishes a tiered blockchain architecture-integrating global, task-specific, and local networks-to orchestrate model deployment, decentralized learning, block creation, and ledger distribution among quantum edge devices, effectively forging a self-governing ecosystem for distributed quantum computation.

A new framework leverages the power of quantum computing, federated learning, and blockchain to address the critical security and scalability challenges of decentralized artificial intelligence in next-generation wireless networks.

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.