Time in Quantum Theory (TiQT) 2026

Session

Relativistic Quantum Information

25 May 2026, 09:20

Albano 3: 4204 - SU Conference Room (56 seats) (Albano Building 3)

9. Quantum signatures of proper time in optical ion clocks

Dr Joshua Foo (Kyushu University)

25/05/2026, 09:20

Invited Talk

Optical clocks based on atoms and ions probe relativistic effects with unprecedented sensitivity. They resolve time dilation due to atom motion or different positions in the gravitational potential through frequency shifts. However, all measurements of time dilation so far can be explained effectively as the result of dynamics with respect to a classical proper time parameter. Here we show...

30. The time-energy uncertainty relation in quantum field theory

Mr Achintya Sajeendran (University of Queensland)

25/05/2026, 10:00

Talk

The time-energy uncertainty relation is often invoked as a heuristic explanation for virtual particles in interacting quantum field theory. However, this interpretation breaks down upon closer scrutiny for several reasons. Although concrete derivations and interpretations of time-energy uncertainty bounds in quantum mechanics have been established, most famously by Mandelstam and Tamm in 1945,...

6. Time-Resolved Signatures Of Observer-dependent Vacuum Fluctuations with Coherently Interacting Emitters

Mr Akhil Deswal (Indian Institute of Science Education & Research (IISER))

25/05/2026, 11:00

Talk

Time in quantum theory is operational, it is inferred from physical processes used as clocks and from temporal correlations registered by quantum systems. The Unruh effect is a striking manifestation of this idea, uniform acceleration changes the detector's notion of time and yields a thermal response in vacuum, linking time and motion. We developed time-resolved approach to detect Unruh...

33. Superluminal Transformations and Indeterminism

Ms Amrapali Sen (International Centre for Theory of Quantum Technologies)

25/05/2026, 11:20

Talk

Quantum theory is widely regarded as fundamentally indeterministic, yet classical frameworks can also exhibit indeterminism once infinite information is abandoned. At the same time, relativity is usually taken to forbid superluminal signalling, yet Lorentz symmetry formally admits superluminal transformations (SpTs). Dragan and Ekert have argued that SpTs entail indeterminism analogous to the...

19. Superluminal tunneling times in relativistic QFT

Prof. Alex Matzkin (LPTM (CNRS and CY Cergy Paris Univ.))

25/05/2026, 11:40

Talk

Many recent experimental works involving quantum tunneling claim their observations are consistent with superluminal or instantaneous barrier traversal times. However, we have recently proved [1] that microcausality prevents superluminal dynamics in the presence of tunneling in a QFT framework in which a potential barrier is represented by a background field. In this talk I will discuss how...