Proves fidelity of private communication codes decays exponentially above channel capacity for all degradable quantum channels, establishing exponential strong converse with single joint infidelity criterion.
@informaq.bsky.social
@informaq.bsky.socialProves fidelity of private communication codes decays exponentially above channel capacity for all degradable quantum channels, establishing exponential strong converse with single joint infidelity criterion.
@informaq.bsky.socialDerives explicit series formulas for quantum, classical, and entanglement-assisted capacities of the amplitude damping channel, eliminating residual optimizations and providing analytical benchmarks for dissipative quantum communication.
@pub2post.bsky.socialHybrid optoelectronic module design enhances quantum communication with:
✨Power use of 7.69W
🏷️Stable temperature at 45°C
đź”—Chip-on-board technology
🔧Improved thermal management
https://dev.tnyp.me/p0vtA7HY/s #QuantumCommunication #QKD #Photonics
@informaq.bsky.socialToshiba won the Quantum City Global Challenge with advancements in quantum-secured communication. This victory signals progress toward practical quantum communication systems.
@informaq.bsky.socialIntegrated photonics market expands 11% yearly, driven by quantum communication systems and AI workload demands. Silicon photonics enables efficient data transmission, with market projected at $17.44B by 2030.
@informaq.bsky.socialFlorida State University awarded $2.1M in federal funding to establish a campus-scale quantum communication testing platform, advancing quantum networking infrastructure development.
@informaq.bsky.socialEstablished inner bounds for confidential classical communication over quantum broadcast channels via novel likelihood-selector encoding and bipartite resolvability techniques, proving capacity regions under conditional strong secrecy.
@informaq.bsky.socialClosed-form capacity formulas for quantum relay channels established. Novel compress-forward strategy enables relay to compress Pauli-error information, optimally reducing noise for quantum communication networks.
@aasforum.bsky.socialLiang Jiang: the best medium to send a photon is not material, it's vacuum — refocus the beam with a lens every few kilometers and a single photon could cross the continent.
Full talk: https://www.youtube.com/watch?v=_edssYqFozY
#AASF #LiangJiang #QuantumCommunication
@informaq.bsky.socialRWTH Aachen researchers proved zero-error quantum source coding requires only 2 messages under odd parity conditions, achieving perfect one-bit communication without entanglement—resolving a decades-old conjecture about spectral properties.
@informaq.bsky.socialDeep learning model achieves >99.999% fidelity in quantum state reconstruction under multimode fiber noise and dynamic perturbations, reducing image transmission bit errors from 50.34% to zero in photonic quantum communication systems.
@informaq.bsky.socialResearchers developed a hybrid quantum communication protocol combining classical error correction with entanglement and superdense coding that exceeds previous performance bounds for data rate and energy efficiency in short-distance quantum networks.
@informaq.bsky.socialNew theoretical framework achieves stronger exponential separations between quantum and classical communication complexity of total functions, improving from n^(1/6) to n^(1/2) exponent with polylogarithmic quantum messages.
@informaq.bsky.socialProves exponential decay of entanglement-transmission fidelity beyond quantum capacity for all finite-dimensional channels via quantum blowing-up lemma and polynomial projector approximations.
#QuantumInformationTheory #QuantumCommunication #QuantumCapacity
@informaq.bsky.socialResearchers developed a mathematical method with quadratic convergence for calculating optimal success probabilities in quantum communication, dramatically improving computational efficiency beyond previous inverse square root approaches.
@informaq.bsky.socialNovel sum-of-squares hierarchy achieves quadratic convergence for computing optimal success probability in quantum channel coding, improving over prior square-root convergence bounds. Uses polynomial optimization and state-discrimination duality.
@informaq.bsky.socialShows that a single relative phase between noise and Bell coherences monotonically orders thresholds for quantum communication abilities—crucial for understanding when noisy entangled states remain useful for cryptography and networking.
@informaq.bsky.socialNew ordered-angle coding scheme enables exact multiuser unanimity testing via Bell states. Power-of-two user counts achieve perfect discrimination in log₂n trials—replacing O(n² log(1/ε)) requirements—with explicit calibration robustness bounds.
@informaq.bsky.socialDaylight-compatible quantum key distribution via satellite using hexagonal boron nitride emitters tuned to Fraunhofer lines (854 nm), enabling practical, continuous quantum networks with fiber-optic ground station integration for the quantum internet.