3 papers
quant-ph2020
Precise Spectroscopy of High-Frequency Oscillating Fields with a Single-Qubit Sensor
Yaoming Chu, Pengcheng Yang, Musang Gong +5
Precise spectroscopy of oscillating fields plays significant roles in many fields. Here, we propose an experimentally feasible scheme to measure the frequency of a fast-oscillating…
quant-ph2019
Complete Quantum-State Tomography with a Local Random Field
Pengcheng Yang, Min Yu, Ralf Betzholz +2
Single-qubit measurements are typically insufficient for inferring arbitrary quantum states of a multi-qubit system. We show that if the system can be fully controlled by driving a…
quant-ph2018
Experimental measurement of the quantum geometric tensor using coupled qubits in diamond
Min Yu, Pengcheng Yang, Musang Gong +9
Geometry and topology are fundamental concepts, which underlie a wide range of fascinating physical phenomena such as topological states of matter and topological defects. In quant…