Vanishing Currents and Hidden States in Bilayer Graphene
![The band structure reveals distinct transport regimes-characterized by combinations of propagating and evanescent modes-within a system exhibiting resonant behavior, where transmission probabilities through the [latex]T^{-}\[/latex] and [latex]T^{+}\[/latex] channels are acutely sensitive to barrier width and height, demonstrating nearly zero transmission at specific energy levels and highlighting the system’s capacity for precise control over quantum phenomena.](https://arxiv.org/html/2601.05970v1/x2.png)
New research reveals how carefully tuned barriers can selectively block or transmit electron flow in bilayer graphene, uncovering unexpected quantum phenomena.
Science
Hidden Signals: Detecting Change in Encrypted Time Series
A new approach enables secure change-point detection in time series data, protecting data privacy through fully encrypted computation.
Securing DeFi Staking: A New Approach to Smart Contract Vulnerability Detection
Researchers have developed a novel method for identifying subtle logical flaws in DeFi staking contracts that traditional security audits often miss.
Wireless Cloaking: Hiding Signals in Plain Sight
A novel approach to wireless security disguises communication signals by intentionally confusing the modulation order, making them harder for eavesdroppers to decipher.
Decoding with Loss: New Limits for Multiset Error Correction
This review explores the theory and practice of multiset deletion-correcting codes, offering insights into building robust communication systems that can tolerate data loss.
The Conversational Crack: How AI Safety Nets Are Failing
![The Echo Chamber jailbreak exploits a vulnerability wherein a large language model can be induced to bypass safety protocols by iteratively prompting it with its own, subtly modified responses, effectively creating a self-reinforcing loop that amplifies deviations from its intended behavior and ultimately unlocks restricted functionalities-a process mathematically analogous to the divergence of a series where [latex] a_n \rightarrow 0 [/latex] but [latex] \sum a_n [/latex] does not converge.](https://arxiv.org/html/2601.05742v1/figures/robot_green.png)
A new automated attack demonstrates how subtly manipulating conversational context can reliably bypass the safety mechanisms of even the most advanced large language models.
Quantum Supremacy’s Trigger: Securing the Blockchain Era
A novel smart contract system links verifiable quantum computational milestones to the activation of post-quantum cryptographic defenses, safeguarding blockchain integrity.
Twisted Light in Exotic Materials: Unveiling Chiral Graviton Modes
![The calculated graviton spectrum, examined across varying bond dimensions for both [latex]S=+2[/latex] and [latex]S=-2[/latex] sectors with an interaction strength of [latex]V_{AB}=0.71[/latex] on a [latex]N=2N_{x}N_{y}[/latex] system-where [latex]N_{x}=24[/latex] and [latex]N_{y}=3[/latex]-demonstrates a stable and increasingly prominent chiral graviton mode, achieved with parameters [latex]\eta=0.05[/latex] and [latex]T=100[/latex].](https://arxiv.org/html/2601.05196v1/x6.png)
New research reveals the existence of stable, chiral gravitational waves within a unique class of quantum materials, bridging theoretical predictions with potential experimental observation.
Black Hole Echoes: How Tiny Shifts Can Disrupt Resonance
![The Regge-pole spectrum of a Schwarzschild black hole, when perturbed, exhibits a migration pattern reminiscent of Nariai spacetime, where increasing perturbation strength causes most poles to shift towards lower real values, while select poles diverge, creating bifurcated trajectories that are attracted to or repelled from specific points-a dynamic governed by integral curves and reflecting the system’s inherent instability as described by [latex]Eq. (18)[/latex].](https://arxiv.org/html/2601.04892v1/x11.png)
New research demonstrates that even subtle changes to a black hole’s environment can dramatically alter its resonant frequencies, potentially leading to instability.
Riding the Waves: Understanding the Electromagnetic Spectrum
From radio signals to visible light, electromagnetic waves underpin much of modern technology and natural phenomena.