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Einstein causality of quantum measurements in the Tomonaga-Schwinger picture [0.0]
We show that selective quantum measurements satisfy a state-independent anyonic commutation relation over spacelike-separated regions.<n>In the simplistic scenario where the measurements are assumed to be instantaneous, this implies quantum no-signalling for non-selective measurements.
arXiv Detail & Related papers (2025-06-17T16:32:29Z)
Spacetime events from the inside out [0.0]
We argue that special and general theories of relativity implicitly assume spacetime events correspond to quantum measurement outcomes. We describe a Bell test using time-like measurements that indicates a non classical causal structure that does not violate no-signaling.
arXiv Detail & Related papers (2025-03-10T12:03:13Z)
2-Adic quantum mechanics, continuous-time quantum walks, and the space discreteness [0.0]
Using techniques of p-adic analysis, it is possible to formulate a rigorous version of the quantum mechanics. The experimental testability of physical theories at the Planck scale is currently impossible. We show that a large class of Schr"odinger equations describes the scaling limits of continuous-time quantum walks on graphs.
arXiv Detail & Related papers (2025-02-23T03:10:55Z)
Test of transient deviations from Quantum Mechanics in Bell's experiment [41.94295877935867]
The conflict between Quantum Mechanics (QM) and Local Realism is most noticeable in the correlations observed between distant regions of a spatially spread entangled state. It has been hypothesized that transient deviations (from the values predicted by QM) may be observed if the correlations are measured in a time shorter than L/c. We present the results of such a test performed on a specially designed optical Bell setup with a distance between stations up to 24 m in straight line.
arXiv Detail & Related papers (2024-04-15T13:01:30Z)
Testing trajectory-based determinism via time probability distributions [44.99833362998488]
Bohmian mechanics (BM) has inherited more predictive power than quantum mechanics (QM) We introduce a prescription for constructing a flight-time probability distribution within generic trajectory-equipped theories. We derive probability distributions that are unreachable by QM.
arXiv Detail & Related papers (2024-04-15T11:36:38Z)
Some consequences of Sica's approach to Bell's inequalities [55.2480439325792]
Louis Sica derived Bell's inequalities from the hypothesis that the time series of outcomes observed in one station does not change if the setting in the other station is changed. In this paper, Sica's approach is extended to series with non ideal efficiency and to the actual time structure of experimental data.
arXiv Detail & Related papers (2024-03-05T13:59:52Z)
Relativity of spacetime ontology: When correlations in space become correlata in time [0.0]
We argue that correlat and correlationsa are not fundamentally distinct. Since the same quantum states may be either entangled or separable, a spatial correlation in one context can become a temporal correlatum in another.
arXiv Detail & Related papers (2023-11-23T09:58:50Z)
Testing the Braneworld Theory with Identical Particles [41.94295877935867]
braneworld scenarios postulate that the spacetime we effectively observe is actually a 4-dimensional brane embedded in a higher-dimensional spacetime. We propose an experimental test that uses a pair of gravitationally interacting identical particles to determine the validity of certain braneworld models.
arXiv Detail & Related papers (2023-09-06T16:40:12Z)
Bell inequalities with overlapping measurements [52.81011822909395]
We study Bell inequalities where measurements of different parties can have overlap. This allows to accommodate problems in quantum information. The scenarios considered show an interesting behaviour with respect to Hilbert space dimension, overlap, and symmetry.
arXiv Detail & Related papers (2023-03-03T18:11:05Z)
A violation of the Tsirelson bound in the pre-quantum theory of trace dynamics [0.0]
The term Bell's theorem refers to a set of closely related results which imply that quantum mechanics is incompatible with local hidden variable theories. We show that the pre-quantum theory of trace dynamics, from which quantum theory is emergent as a thermodynamic approximation, permits the CHSH correlation to take values higher than $2sqrt2$.
arXiv Detail & Related papers (2022-08-03T16:45:43Z)
Indefinite temporal order without gravity [0.0]
Recent research has shown that, combined with quantum theory, gravitational effect can result in events with an indefinite temporal order. We construct a non-gravitational scenario where accelerating particles interacting with optical cavities result in a violation of the temporal Bell inequalities analogous to the gravitational case. We find that the inequalities can also be violated by time-like events, exposing an ambiguity in their use as a theory-independent test of indefinite temporal order.
arXiv Detail & Related papers (2022-04-30T05:28:19Z)
Gravitational orbits, double-twist mirage, and many-body scars [77.34726150561087]
We explore the implications of stable gravitational orbits around an AdS black hole for the boundary conformal field theory. The orbits are long-lived states that eventually decay due to gravitational radiation and tunneling.
arXiv Detail & Related papers (2022-04-20T19:18:05Z)
Observers of quantum systems cannot agree to disagree [55.41644538483948]
We ask whether agreement between observers can serve as a physical principle that must hold for any theory of the world. We construct examples of (postquantum) no-signaling boxes where observers can agree to disagree.
arXiv Detail & Related papers (2021-02-17T19:00:04Z)
Topological Quantum Gravity of the Ricci Flow [62.997667081978825]
We present a family of topological quantum gravity theories associated with the geometric theory of the Ricci flow. First, we use BRST quantization to construct a "primitive" topological Lifshitz-type theory for only the spatial metric. We extend the primitive theory by gauging foliation-preserving spacetime symmetries.
arXiv Detail & Related papers (2020-10-29T06:15:30Z)
A criterion to characterize interacting theories in the Wightman framework [0.0]
We propose a criterion to characterize interacting theories in a suitable Wightman framework of quantum field theories. We conjecture that it characterizes either unstable (composite) particles or the charge-carrying particles, which become infraparticles in the presence of massless particles.
arXiv Detail & Related papers (2020-02-20T09:52:49Z)
A strong no-go theorem on the Wigner's friend paradox [0.0]
We prove that if quantum evolution is controllable on the scale of an observer, then one of 'No-Superdeterminism', 'Locality' or 'Absoluteness of Observed Events' must be false. We show that although the violation of Bell-type inequalities in such scenarios is not in general sufficient to demonstrate the contradiction between those three assumptions, new inequalities can be derived in a theory-independent manner.
arXiv Detail & Related papers (2019-07-12T08:09:44Z)

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