Yipu Song

A twofold quantum delayed-choice experiment in a superconducting circuit

2017 · Science Advances

Wave-particle complementarity lies at the heart of quantum mechanics. To illustrate this mysterious feature, Wheeler proposed the delayed-choice experiment, where a quantum system manifests the wave- or particle-like attribute, depending on the experimental arrangement, which …

Experimental Simulation of Open Quantum System Dynamics via Trotterization

2021 · Physical Review Letters

Digital quantum simulators provide a diversified tool for solving the evolution of quantum systems with complicated Hamiltonians and hold great potential for a wide range of applications. Although much attention is paid to the unitary …

Quantum switch for itinerant microwave single photons with superconducting quantum circuits

2024 · Physical Review Applied

A classical switch or router determines which of several inputs to the device passes through the output. In analogy, a quantum switch that coherently links the input to a superposition of several outputs plays an …

Scalable low-overhead superconducting nonlocal coupler for circuit connectivity enhancement

2026 · Physical Review Applied

Quantum error correction codes with non-local connections such as quantum low-density parity-check (qLDPC) incur lower overhead and outperform surface codes on large-scale devices. These codes are not applicable on current superconducting devices with nearest-neighbor connections. …