Microwave Communication Under Weak Intensity to Quantumized Level:Recent Progress and Future Challenges

We provide an overview of the recent progresses on the system architecture design and performance prediction for microwave signal detection under weak signal intensity regime,up to quantumized level.The technique roadmap includes two perspectives,the opto-electro-mechanical(OEM)and superconducting devices.For the former one,we first overview the concept of OEM,and then introduce the signal detection based on capacitive-opto-electro-mechanical systems and piezoopto-electro-mechanical systems.For the latter one,we first overview the concept and architecture of Josephson junction,and then introduce the signal detection based on superconducting Hanbury Brown-Twiss(HBT)experiments andΛenergy-level splitting system.Besides,we review the microwave detection based on Rydberg atom system.We believe that this overview can provide a guidance for future transmission limit,signal processing,detection device fabrication and real experiments.

Topological quantum memory interfacing atomic and superconducting qubits

We propose a scheme to manipulate a topological spin qubit which is realized with cold atoms in a one-dimensional optical lattice.In particular, by introducing a quantum opto-electro-mechanical interface, we are able to first transfer a superconducting qubit state to an atomic qubit state and then to store it into the topological spin qubit. In this way, an efficient topological quantum memory could be constructed for the superconducting qubit. Therefore, we can consolidate the advantages of both the noise resistance of the topological qubits and the scalability of the superconducting qubits in this hybrid architecture.