Dissipation in Quantum Tunneling Processes: Temperature and voltage effects revealed

What is it about?

I present to you our recent publication, which deals with energy dissipation in quantum tunnel junctions. How do electrons lose energy when tunneling through a barrier? How does temperature influence this dissipation, and can we identify critical thresholds for this behaviour? Based on experimental results, we propose a model that reveals a velocity-dependent form of dissipation, not observed in classical macroscopic physics. A key finding is the identification of a critical temperature at 137 K, where dissipation behaviour changes due to increased electron-phonon interactions. Could this understanding bring us closer to achieving quantum coherence in devices operating at room temperature? These findings raise new questions and open avenues for future research into the behaviour of quantum systems under varying thermal and electrical conditions.

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Photo by Dynamic Wang on Unsplash

Photo by Dynamic Wang on Unsplash

Why is it important?

Understanding energy dissipation in quantum tunnel junctions is essential for advancing quantum technology. Dissipation, the process where energy is lost as heat or other forms, directly impacts the efficiency and coherence of quantum systems. Here's why this study is important: Advancing Quantum Coherence: The velocity-dependent dissipation identified in this work provides new insights into how quantum systems lose energy. This understanding is crucial for maintaining quantum coherence, a key factor for reliable quantum computing and sensing. Room-Temperature Quantum Devices: By identifying a critical temperature (137 K) where dissipation behavior changes, this study helps pave the way for the development of quantum devices that can operate closer to room temperature. Such advancements would make quantum technology more practical and accessible. Fundamental Physics: The discovery of a novel form of dissipation, not observed in macroscopic physics, deepens our understanding of quantum mechanics and its intersection with thermodynamics. Device Optimization: The results provide guidelines for optimizing solid-state quantum devices by controlling temperature and voltage to minimize energy loss and enhance performance.

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