海角黑料

Organisers 

• Kay Brandner, School of Physics and Astronomy
• Mădălin Guţă, School of Mathematical Sciences 

Keynote Speaker 

• Florian Meier, Atominstitut TU Wien
  
  Quantum limits in timekeeping: how non-equilibrium fluctuations impact precision
  
  Abstract: Physical devices operating out of equilibrium are inherently affected by thermal fluctuations, limiting their operational precision. This issue is pronounced at microscopic and especially quantum scales and can only be mitigated by incurring additional entropy dissipation. For instance, clocks are inherently governed by the second law of thermodynamics and need a thermodynamic flux towards equilibrium to measure time, which results in a minimum entropy dissipation per clock tick. Classical and quantum models and experiments often show a linear relationship between precision and dissipation, but the ultimate bounds on this relationship are unknown. In this talk, I will present a recent theoretical discovery of a quantum many-body system that achieves clock precision scaling exponentially with entropy dissipation, surpassing linear thermodynamic precision limits. I will then discuss how this insight relates more broadly to the role of non-equilibrium fluctuations in microscopic systems. Finally, I will outline how correlations emerging from quantum statistics may provide a general mechanism for suppressing fluctuations, pointing to an intriguing connection between timekeeping and random matrix universality.

Visiting Speaker

• Masaya Nakagawa, University of Tokyo
  
  Topology of discrete quantum feedback control

Local Speakers 

• Gerardo Adesso, School of Mathematical Sciences 
• Lucia Hackermüller, School of Physics and Astronomy 
• Weibin Li, School of Physics and Astronomy 
• Leah Turner, School of Mathematical Sciences