Sympathetic cooling of a radio-frequency LC circuit to its ground state in an optoelectromechanical system

Year: 2021

Authors: Malossi N., Piergentili P., Li J., Serra E., Natali R., Di Giuseppe G., Vitali D.

Autors Affiliation: Univ Camerino, Sch Sci & Technol, Phys Div, I-62032 Camerino, MC, Italy; Ist Nazl Fis Nucl, Sez Perugia, Via A Pascoli, I-06123 Perugia, Italy; Delft Univ Technol, Kavli Inst Nanosci, Dept Quantum Nanosci, NL-2628 CJ Delft, Netherlands; Zhejiang Univ, Dept Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, Peoples R China; Zhejiang Univ, State Key Lab Modem Opt Instrumentat, Hangzhou 310027, Peoples R China; Inst Mat Elect & Magnetism, Nanosci Trento FBK Div, I-38123 Povo, Trento, Italy; Ist Nazl Fis Nucl, Trento Inst Fundamental Phys & Applicat, I-38123 Povo, Trento, Italy; Delft Univ Technol, Dept Microelect & Comp Engn ECTM DIMES, Feldmanweg 17, NL-2628 CT Delft, Netherlands; CNR INO, Largo Enrico Fermi 6, I-50125 Florence, Italy

Abstract: We present a complete theory for laser cooling of a macroscopic radio-frequency LC electrical circuit bymeans of an optoelectromechanical system, consisting of an optical cavity dispersively coupled to a nanomechanical oscillator, which is in turn capacitively coupled to the LC circuit of interest. The driven optical cavity cools the mechanical resonator, which in turn sympathetically cools the LC circuit. We determine the optimal parameter regime where the LC resonator can be cooled down to its quantum ground state, which requires a large optome-chanical cooperativity, and a larger electromechanical cooperativity. Moreover, comparable optomechanical and electromechanical coupling rates are preferable for reaching the quantum ground state.


Volume: 103 (3)      Pages from: 033516-1  to: 033516-12

More Information: We acknowledge the support of the European Commission´s Horizon 2020 programme for Research and Innovation under Grant Agreement No. 732894 (FETPROACT-01-2016, HOT Hybrid Optomechanical Technologies), of the Project QuaSeRT funded by the QuantERA ERA-NET Cofund in Quantum Technologies, the support of the University of Camerino UNICAM through the research project FAR2018, and of the INFN through the tHEEOM-RD project. P.P. acknowledges support from the European Commission´s Horizon 2020 Programme for Research and Innovation under Grant Agreement No. 722923 (Marie Curie ETN-OMT).University of Camerino UNICAM
KeyWords: microwave; entanglement; cavity; radiation; motion; waves
DOI: 10.1103/PhysRevA.103.033516