Abstract
I identify a fundamental difference between classical and quantum dynamics in the linear response regime by showing that the latter is, in general, contextual. This allows me to provide an example of a quantum engine whose favorable power output scaling unavoidably requires nonclassical effects in the form of contextuality. Furthermore, I describe contextual advantages for local metrology. Given the ubiquity of linear response theory, I anticipate that these tools will allow one to certify the nonclassicality of a wide array of quantum phenomena.
Original language | English |
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Article number | 230603 |
Number of pages | 6 |
Journal | Physical Review Letters |
Volume | 125 |
Issue number | 23 |
DOIs | |
Publication status | Published - 2020 |