Nanowelding of quantum spin- 1 2 chains at minimal dissipation
Moallison F. Cavalcante, Marcus V. S. Bonança, E. Miranda +1 more
Nonequilibrium phenomena are commonly expected to be nonuniversal, i.e., they depend intricately on the system and processes. Here, the authors show that nevertheless some universal features do persist. They consider the energetic cost of finite-time nano-welding of quantum spin-\textonehalf{} chains. They find that some features depend only on (i) the process speed, (ii) the system's symmetry, and (iii) the existence of an energy gap. Depending on the strength of SU(2) symmetry breaking, there are striking universalities in (a) the scaling of the cost with the duration time for slowly-varying processes and (b) the functional form of the cost-optimal protocol.
arXiv:2404.10074•Physical review. B./Physical review. B•Aug 5, 2024•3 citations