Theories of Everything with Curt Jaimungal
Theories of Everything with Curt Jaimungal
Theories of Everything
Aephraim Steinberg: The Physicist Who Measured Negative Time
2 hour 27 minutes Posted Apr 13, 2026 at 3:25 pm.
Defining Negative Time
Quantum Trajectory Theory
The Holland Tunnel Analogy
Resonant Atomic Interactions
Superluminal Energy Propagation
Eight Velocities of Light
Causality and Retrocausality
Dwell Time vs. Delay
Time: Operator or Parameter?
Bell’s Theorem and Realism
Heisenberg’s Measurement Disturbance
Weak Measurement Formalism
Time Symmetry and Entropy
Bohmian Trajectories Observed
Spin-Statistics and Indistinguishability
Quantum Computational Advantage
Many Worlds vs. Complexity
Psi-Ontic vs. Psi-Epistemic
Collapsing Tunneling Particles
Larmor vs. Atto Clocks
Locality and Information
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This conversation belongs in a category I wish were larger on this channel: the experimentalist who also thinks (deeply) about foundations. Professor Aephraim Steinberg, winner of Physics World’s Breakthrough of the Year in 2011, is that species! For basically 30 years, he’s been measuring aspects of physics that others wouldn’t touch: Bohmian trajectories, Heisenberg’s disturbance bound (he showed it was wrong), even where the photon is inside the double slit (which most textbooks will tell you is impossible). His lab measured negative time — and it keeps reappearing across completely different experiments, stubbornly suggesting it means something.
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LINKS MENTIONED:
- Aephraim's Website: https://www.physics.utoronto.ca/~aephraim/
- Aephraim's Papers: https://scholar.google.com/citations?user=PzUyb6IAAAAJ
- Photon Negative Time in Atom Cloud [Paper]: https://arxiv.org/pdf/2409.03680
- How Much Time Does a Photon Spend as Atomic Excitation? [Paper]: https://arxiv.org/abs/2310.00432
- Measuring Time Atoms Spend in Excited State [Paper]: https://journals.aps.org/prxquantum/abstract/10.1103/PRXQuantum.3.010314
- Tunneling Atom Time in Barrier [Paper]: https://arxiv.org/abs/1907.13523
- Single-Photon Tunneling Time [Paper]: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.71.708
- Traversal Time for Tunneling [Paper]: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.49.1739
- Propagation of a Gaussian Light Pulse [Paper]: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.1.305
- Linear Pulse Propagation in Absorbing Medium [Paper]: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.48.738
- Eighth Velocity of Light [Paper]: https://pubs.aip.org/aapt/ajp/article-abstract/45/6/538/1045817/Eighth-velocity-of-light
- Attosecond Ionization [Paper]: https://www.science.org/doi/10.1126/science.1163439
- Tunneling Optical Pulses Photonic Band Gaps [Paper]: https://attoworld.de/fileadmin/user_upload/tx_attoworld/publications/paper_PhysRevLett_Y1994_M10_D24_V73_P2308.pdf
- Evidence of Negative Time [Article]: https://www.scientificamerican.com/article/evidence-of-negative-time-found-in-quantum-physics-experiment/
- Light Speed Reduction [Article]: https://www.nature.com/articles/17561
- On the Theory of Light and Colors [Paper]: https://www.jstor.org/stable/pdf/107113.pdf
- Wave Propagation and Group Velocity [Book]: https://amazon.com/dp/1483253937?tag=toe08-20
- EPR Paper [Paper]: https://journals.aps.org/pr/abstract/10.1103/PhysRev.47.777
- Uncertainty Principle: https://en.wikipedia.org/wiki/Uncertainty_principle
- QBism [Paper]: https://arxiv.org/abs/1003.5209
More links at https://curtjaimungal.substack.com
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