用量子说“悄悄话”，解锁保密通信硬核新技术

Core Viewpoint - The recent advancements in quantum direct communication by Tsinghua University’s Professor Long Guilu's team have transformed the concept from basic quantum telegrams to real-time quantum telephony, enhancing secure communication methods significantly [1][3]. Group 1: Quantum Direct Communication Technology - Quantum direct communication utilizes the unique properties of quantum states to ensure secure transmission without the need for traditional encryption methods [3][4]. - The concept is likened to a "quantum envelope" that self-destructs if tampered with, ensuring that any attempt to eavesdrop results in the destruction of the information [4]. Group 2: Performance Improvements - In early 2025, the performance of quantum direct communication was significantly enhanced, achieving a stable transmission rate of 2.38 kbps over a distance of 104.8 km, marking a nearly 5000-fold increase compared to the previous year [5]. - This improvement allows for the real-time transmission of confidential text and image information, indicating a shift from theoretical demonstration to practical application [5]. Group 3: Future Applications and Market Integration - Future developments aim to establish a global quantum communication network through quantum satellites, enhancing security against eavesdropping [6]. - Currently, quantum terminals are designed for specialized fields such as government and finance, with broader public access expected to evolve through chip integration and service offerings [7]. - The unique contribution of quantum direct communication lies in its ability to provide inherent security during transmission, marking a new paradigm in secure communication [7].