重大突破，美国高校首次用商用光纤实现量子传输，或迎互联网革命

Core Insights - The University of Pennsylvania team achieved a groundbreaking advancement in quantum communication, successfully transmitting quantum signals over commercial fiber networks using standard internet IP protocols [1][3][6] - The key innovation is the compact "Q chip," which coordinates quantum and classical information, ensuring compatibility with existing network protocols and enabling automatic error correction with a transmission fidelity exceeding 97% [3][4][9] Technical Breakthrough - The testing was conducted on a one-kilometer commercial fiber network at Verizon's campus, demonstrating stable and efficient performance [1][3] - The "Q chip" is considered a foundational element for the future "quantum internet," potentially leading to transformative changes similar to the advent of the internet [3][6][14] Challenges and Solutions - Quantum networks face challenges due to the delicate nature of quantum particles, which lose their special states upon measurement [7][11] - The "Q chip" addresses these challenges by coordinating conventional light signals with quantum particles, allowing for effective communication without damaging the quantum information [7][9] Future Prospects - Currently, the network consists of a single server and node connected by one kilometer of Verizon fiber, but expanding the network is feasible by producing more chips [11][13] - A significant obstacle remains in transmitting quantum signals without disrupting entanglement, although some teams have managed to transmit "quantum keys" for secure communication [11][13]