Observation of dynamical quantum phase transition by a superconducting qubit simulation

  1. Xue-Yi Guo,
  2. Chao Yang,
  3. Yu Zeng,
  4. Yi Peng,
  5. He-Kang Li,
  6. Hui Deng,
  7. Yi-Rong Jin,
  8. Shu Chen,
  9. Dongning Zheng,
  10. and Heng Fan
A dynamical quantum phase transition can occur in time evolution of sudden quenched quantum systems across phase transition. It corresponds to nonanalytic behavior at a critical time

Demonstration of irreversibility and dissipation relation of thermodynamics with a superconducting qubit

  1. Xue-Yi Guo,
  2. Yi Peng,
  3. Changnan Peng,
  4. Hui Deng,
  5. Yi-Rong Jin,
  6. Chengchun Tang,
  7. Xiaobo Zhu,
  8. Dongning Zheng,
  9. and Heng Fan
We investigate experimentally the relation between thermodynamical irreversibility and dissipation on a superconducting Xmon qubit. This relation also implies the second law and the