Weak Particle Presence
arXiv:2503.19079 · doi:10.1007/s10701-025-00837-2
Abstract
The concept of presence has been extensively explored in philosophy, yet the notion of particle presence within quantum theory remains under-examined. In this article, we explore particle presence through an analysis of a paradox arising from weak measurements. We show that the classical intuition about particle presence involves an erroneous logical combination of propositions from single-time weak values, leading to inconsistencies that result in the deduction of discontinuous trajectories. Instead, we argue that by treating presence as a property defined across time by measuring sequential weak values, the discontinuity paradox is resolved, providing a coherent, non-classical account of particle presence. We discuss some advantages and drawbacks of this account, and consider applications to other cases of trajectory discontinuity.
arXiv comment30 pages, 5 figures. To be published in Foundations of Physics
References in corpus (35)
- Quantum correlations with no causal order
- On the Consistent Histories Approach to Quantum Mechanics
- Direct measurement of general quantum states using weak measurement
- Amplification of Angular Rotations Using Weak Measurements
- Weak value amplification is suboptimal for estimation and detection
- Precision metrology using weak measurements
- Continuous weak measurement of quantum coherent oscillations
- Quantum Cheshire Cats
- Observation of a quantum Cheshire Cat in a matter wave interferometer experiment
- The past of a quantum particle
- There are no particles, there are only fields
- How the result of a single coin toss can turn out to be 100 heads
- Measuring ultrasmall time delays of light by joint weak measurements
- When amplification with weak values fails to suppress technical noise
- Sequential weak measurement
- Weak value controversy
- Weak value beyond conditional expectation value of the pointer readings
- Power-recycled weak-value-based metrology
- Tracing the past of a quantum particle
- Observing angular deviations in light beam reflection via weak measurements
- The Case of the Disappearing (and Re-Appearing) Particle
- Weak-Value Amplification of light deflection by a dark atomic ensemble
- What Quantum Measurements Measure
- The New Quantum Logic
- Weak values and quantum properties
- Weak-value amplification: state of play
- Observing the "quantum Cheshire cat" effect with noninvasive weak measurement
- On the novelty, efficacy, and significance of weak measurements for quantum tomography
- Can Two Quantum Cheshire Cats Exchange Grins?
- Weak values and the past of a quantum particle
- Achieving metrological precision limits through post-selection
- Photons are lying about where they have been, again
- Persistence and Nonpersistence as Complementary Models of Identical Quantum Particles
- How (Not) to Understand Weak Measurements of Velocities
- Twin Quantum Cheshire Photons