How to measure entropy and entanglement in mesoscopic systems?
Recently, entropy measurements of quantum dots where demonstrated based on charge sensitivity. These experiments require temperature variations, and extract entropy changes due to gate voltage variations using Maxwell relations. In addition to describing on going experimental puzzles, I will discuss new directions that these methods open, such as measurements of fractional entropy in frustrated Kondo systems. I will finally discuss a possible approach to measure entanglement entropy in mesoscopic systems, triggered by a relation between entanglement entropy - obtained by tracing out a subsystem - and thermal entropy - produced in the process of a projective measurement.
תאריך עדכון אחרון : 15/02/2022