How to switch between relational quantum clocks. (arXiv:1810.04153v2 [gr-qc] UPDATED) 上午9:37 | gr-qc updates on arXiv.org Authors: Philipp A Hoehn, Augustin Vanrietvelde Every clock is a physical system and thereby ultimately quantum. A naturally arising question is how to describe time evolution relative to quantum clocks and, specifically, how the dynamics relative to different quantum clocks are related. This is a pressing… Read more →

Observations of coherence de Broglie waves. (arXiv:2007.04738v1 [quant-ph]) 上午10:12 | Byoung S. Ham | quant-ph updates on arXiv.org Photonic de Broglie waves (PBWs) via two-mode entangled photon pair interactions on a beam splitter show a pure quantum feature which cannot be obtained by classical means1-4. Although PBWs have been intensively studied for quantum metrology5-13 and quantum sensing14-25 over the last… Read more →

Born’s rule from almost nothing. (arXiv:2006.14175v1 [quant-ph]) 上午10:14 | Sabine Hossenfelder | quant-ph updates on arXiv.org We here put forward a simple argument for Born’s rule based on the requirement that the probability distribution should not be a function of the number of degrees of freedom. How small an environment can be to still generate decoherence?. (arXiv:2006.14468v1 [quant-ph]) 上午10:14 |… Read more →

Observing the fate of the false vacuum with a quantum laboratory. (arXiv:2006.06003v1 [hep-th]) 上午9:31 | Steven Abel, Michael Spannowsky | quant-ph updates on arXiv.org We design and implement a quantum laboratory to experimentally observe and study dynamical processes of quantum field theories. Our approach encodes the field theory as an Ising model, which is then solved by a quantum annealer…. Read more →

Which Worldlines Represent Possible Particle Histories? 上午8:00 | Latest Results for Foundations of Physics Abstract Based on three common interpretive commitments in general relativity, I raise a conceptual problem for the usual identification, in that theory, of timelike curves as those that represent the possible histories of (test) particles in spacetime. This problem affords at least three different solutions, depending… Read more →

Which Worldlines Represent Possible Particle Histories? 上午8:00 | Latest Results for Foundations of Physics Abstract Based on three common interpretive commitments in general relativity, I raise a conceptual problem for the usual identification, in that theory, of timelike curves as those that represent the possible histories of (test) particles in spacetime. This problem affords at least three different solutions, depending… Read more →