Surprisingly, arbitrarily weak local dissipation can trigger infinite Markov length in quantum systems—even those relaxing rapidly to product-like states. Challenges conventional understanding of mixed-state phase stability.
@informaq.bsky.social
@informaq.bsky.socialSurprisingly, arbitrarily weak local dissipation can trigger infinite Markov length in quantum systems—even those relaxing rapidly to product-like states. Challenges conventional understanding of mixed-state phase stability.
@informaq.bsky.socialTheoretical investigation of how retained quantum information dynamically suppresses black hole evaporation through a 'memory burden' mechanism, establishing necessary conditions for information retention to affect evaporation rates.
@informaq.bsky.socialResearchers derive mutual information of measurement in CFTs, finding it depends on operator scaling dimension rather than central charge. For adjacent intervals, mutual information scales as (∆-1/2)², with holographic interpretation via AdS/CFT.
@informaq.bsky.socialResearchers developed a computational framework delivering tighter bounds on quantum uncertainty relations than existing methods, enhancing quantum steering detection and enabling precise quantum resource certification.
@informaq.bsky.socialResearchers developed a nonlinear squeezing framework to verify non-Gaussianity in continuous quantum states, achieving the first experimental certification of multi-photon-added coherent states with third- and fifth-order quantum nonlinearities.
@informaq.bsky.socialQuantitative bounds establish how quantum channel divergences depend on Arveson-Radon-Nikodym derivatives, solving discontinuity problems in geometric fidelity and Rényi divergence measures.
@informaq.bsky.socialBosonic QCMI diverges logarithmically at BEC, establishing it as a quantum-information order parameter. Measurement back-action via off-diagonal long-range order amplifies causal influence unbounded with condensate growth.
@informaq.bsky.socialResearchers prove spatial sudden death of entanglement in gapped quantum systems: quantum correlations disappear beyond a finite distance, with implications for understanding matrix product states and quantum information in many-body systems.
@informaq.bsky.socialConstructed a real AME(4,6) state solving Euler's quantum 36 officers problem using a cyclic-shift ansatz, achieving 96 nonzero amplitudes and establishing connections between fractional Latin squares and quantum entanglement structures.
@informaq.bsky.socialFramework constructs geometrically optimal witnesses enabling universal detection of bipartite, multipartite, and high-dimensional entanglement with enhanced noise robustness and improved computational efficiency.
@informaq.bsky.socialNovel proof that three parties can win the GHZ game using only real-valued quantum states with six qubits, eliminating complex numbers while maintaining quantum non-locality demonstrations.
@informaq.bsky.socialDerives explicit analytical formulas connecting Bloch and Majorana geometric representations of quantum states, enabling correlation analysis and parameter-reduced optimization of symmetric multiqubit systems.
@kill-bait.bsky.socialQuantum Relative Entropy Offers a New Route to Einstein’s Gravity Equations
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@informaq.bsky.socialNovel framework leverages group symmetry to design secure communication codes for quantum wiretap channels, proving multi-use rates exceed single-use capacity through correlated preprocessing and achieving explicit nonadditivity bounds.
@informaq.bsky.socialResearchers characterize fundamental limits of discriminating quantum Markovian dynamics, revealing temporal resolution as a resource for quantum hypothesis testing and establishing three distinct discrimination regimes.
@informaq.bsky.socialEstablishes von Neumann entanglement of purification is nonadditive for Werner states. Remarkably, even separable states benefit from collective preparation, requiring less entanglement per copy than single-copy optimization.
@informaq.bsky.socialBreakthrough: First polynomial-time algorithms for testing multipartite quantum separability and computing nuclear tensor norms. Novel approach combines spectral compression and multiprover game theory to overcome fundamental complexity barriers.
@informaq.bsky.socialWe prove universal bounds on entanglement capacity at conformal interfaces: capacity coefficient exceeds entropy coefficient. Results validated across free field theories, holographic models, and interacting quantum systems.
@informaq.bsky.socialNew research reveals black hole quantum information concentrates in tiny regions near the horizon, not spread throughout the interior—solving paradoxes through covariant entropy bounds and tensor network analysis of AdS/CFT.
@informaq.bsky.socialExtends polymorphism-based reductions to entangled CSPs, proving RE-completeness of entangled n-colouring (n≥3) and establishing hardness for quantum constraint problems lacking commutativity gadgets through stable minion homomorphisms.