2014/03/01 by Amir Rosenblatt, Amir Lafont Rosenblatt, F. Lafont +10 · 1 citation
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Algorithm #Anomaly Detection Techniques and Applications #Artificial bee colony algorithm #Artificial intelligence #Artificial neural network #Backpropagation #Charge (physics) #Computer science #Condensed matter physics #Convergence (economics) #Machine learning #Mathematics #Maxima and minima #Mesoscopic physics #Multilayer perceptron #Neural Networks and Applications #Particle swarm optimization #Perceptron #Physics #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Quantum point contact #Quantum well #Semiconductor Quantum Structures and Devices #Swarm intelligence #Telecommunications #Time Series Analysis and Forecasting #Transmission (telecommunications) #Upstream (networking) #cond-mat.mes-hall
paper · pdf · open access · doi:10.1038/s41467-017-02433-z
published in Nature Communications 8(1), 2251 (Nature Portfolio)
openalex publication_date 2014/03/01 · arxiv created 2017/12/22 · arxiv updated 2017/12/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Controlling the transmission of electrical current using a quantum point contact constriction paved a way to a large variety of experiments in mesoscopic physics. The increasing interest in heat transfer in such systems fosters questions about possible manipulations of quantum heat modes that do not carry net charge (neutral modes). Here we study the transmission of upstream neutral modes through a quantum point contact in fractional hole-conjugate quantum Hall states. Employing two different measurement techniques, we were able to render the relative spatial distribution of these chargeless modes with their charged counterparts. In these states, which were found to harbor more than one downstream charge mode, the upstream neutral modes are found to flow with the inner charge mode-as theoretically predicted. These results unveil a universal upstream heat current structure and open the path for more complex engineering of heat flows and cooling mechanisms in quantum nano-electronic devices.