MIT researchers have developed a new type of interconnect device that supports "all to all" communication, allowing all superconducting quantum processors in the network to communicate directly with each other. They used this device to demonstrate remote entanglement, laying the foundation for building large-scale, distributed quantum computing networks, and providing key technical support for the future quantum Internet. This study was published on March 21st in the journal Nature Physics. The current architecture used to connect superconducting quantum processors adopts a "point-to-point" connection method, and multiple transmissions between network nodes can easily lead to error rate accumulation. Researchers have previously developed a quantum computing module that can send information photons bidirectionally. In this study, they further connected two such modules to waveguides, achieving directional emission and efficient absorption of photons. Each module consists of 4 qubits, which are responsible for interacting with the waveguide that transmits photons and transmitting information to a larger quantum processor. Researchers inject energy into quantum bits through a series of microwave pulses, causing them to emit photons carrying quantum information. Accurately controlling the phase of these pulses can generate quantum interference effects, allowing photons to propagate in a specified direction. In addition, by inverting the pulse time, researchers can ensure that the quantum bits in the remote module absorb photons. By "throwing" and "receiving" photons like this, researchers can create "quantum interconnects" between non-native quantum processors, enabling remote entanglement. Even if the photon itself has disappeared, two quantum bits that are far apart still have quantum correlations, allowing people to perform parallel quantum computing operations. Remote entanglement is a crucial step in developing powerful, distributed quantum processor networks. To improve the success rate of remote entanglement, researchers have conducted a key innovation. They developed a reinforcement learning algorithm that pre distorts photons to minimize their loss during transmission, thereby improving absorption efficiency. In the end, they increased the photon absorption efficiency by over 60%, which is sufficient to ensure that the final state is a high fidelity entangled state. This achievement is not only applicable to superconducting quantum systems. In principle, its remote entanglement protocol can be extended to other quantum computing platforms, providing an important hardware support for the development of quantum Internet. (New Society)