Microscopic systems can assume quantum configurations devoid of classical counterparts. However, as we transition toward the macroscopic domain, the potential for such non-classical behavior diminishes, leaving us with no evidence of quantum phenomena at larger scales. Why does this happen, and how does quantumness dissipate as we move beyond the microscopic realm? These questions, still largely unanswered, present intriguing and formidable challenges in modern physics research, aligning with the overarching goal of the TEQ project.
TEQ seeks to explore the macroscopic limits of quantum mechanics through an innovative research program that goes beyond existing approaches reliant on matter-wave interferometry. The TEQ Consortium will undertake the following objectives:
1. Confine a specially crafted nanocrystal within a radio-frequency ion trap, employing optical parametric feedback to cool it and create ultra-low noise environments for operation.
2. Quantitatively identify and experimentally control all major sources of decoherence impacting the nanocrystal, aiming to prepare high-quality quantum states of its motional degrees of freedom.
3. Examine the light scattered by the nanocrystal to test quantum predictions for its motion against those of spontaneous collapse and non-standard decoherence mechanisms. This analysis aims to identify and either confirm or rule out key quantum-spoiling effects that have not been thoroughly explored to date.
This roadmap facilitates the testing of quantum effects in systems with masses orders of magnitude larger than those employed in the most successful quantum experiments thus far, bridging the gap with the macroscopic world. Additionally, it promises significant technological impact. The constructed device will exhibit exceptional sensitivity to frequency and displacements, making a substantial and explicit technological contribution to the development of quantum-enhanced metrological sensors.
Link: www.tequantum.eu