Metastability-induced solid-state quantum batteries for powering microwave quantum electronics
Yuanjin Wang, Hao Wu, and Qing Zhao
Phys. Rev. A 112, L030201 (2025) - Published 15 September, 2025
This study demonstrates a solid-state quantum battery in which metastable states enable stable and long-lived energy storage. The authors further show that the stored energy can be controllably extracted for coherent microwave emission at room temperature.
Symmetry-induced failures of tomographic locality: Constructing foil theories by twirling
Daniel Centeno, Marco Erba, Thomas D. Galley, David Schmid, John H. Selby, Robert W. Spekkens, Sina Soltani, Jacopo Surace, Alex Wilce, and Yìlè Yīng
Phys. Rev. A 112, L030202 (2025) - Published 22 September, 2025
The paper constructs a class of theories by starting from some operational theory (classical, quantum, or post-quantum) and imposing a symmetry. This yields many examples of theories that violate a principle known as tomographic locality, and in turn sheds light on the meaning of this principle.
Retrodictive approach to quantum state smoothing
Mingxuan Liu, Valerio Scarani, Alexia Auffèves, and Kiarn T. Laverick
Phys. Rev. A 112, L030203 (2025) - Published 25 September, 2025
This paper provides a solution based on quantum retrodiction to the quantum state smoothing problem – conditioning the quantum state of an open system on measurement information obtained both prior and posterior – that always provides a physical quantum state and does not depend on how a secondary (perhaps hypothetical) observer measured the remaining information in the system.




















