부산대학교 도서관

The development and the use of quantum technologies are hindered by a fundamental challenge: Quantum materials exhibit macroscopic quantum properties at extremely low temperatures due to the loss of quantum coherence at elevated temperatures. Here, based on our recent discovery of room temperature superfluorescence in perovskites, we present the Quantum Analog of Vibration Isolation, 'QAVI', model and explain how it protects the quantum phase against dephasing at high temperatures. We then postulate the requirements for observation of macroscopic quantum phenomena at practical temperatures and propose a unified model for all macroscopic quantum phase transitions. We further present the general features of the temperature and density phase diagram of macroscopic quantum phase transitions that are mediated by the QAVI process and identify the similarities observed in the phase diagram of high Tc superconductors. Understanding this fundamental quantum coherence protection mechanism is imperative to accelerate the discovery of high temperature macroscopic quantum phenomena, and offers significant potential for developing quantum technologies functioning under practical conditions.
Comment: 21 pages, 4 figures