Continuous Cooling of a Microwave Mode on a Benchtop using Hyperpolarized NV$^-$ Diamond

Hyperpolarized NV− Diamond Wern Ng,1 Hao Wu,2, 3 and Mark Oxborrow1 1)Department of Materials, Imperial College London, South Kensington SW7 2AZ, London, United Kingdom 2)Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE), School of Physics, Beijing Institute of Technology, Beijing 100081, China 3)Beijing Academy of Quantum Information Sciences, Beijing 100193, China