When does entanglement through gravity imply gravitons?
arXiv:2601.03214 · doi:10.1103/lq47-1hfg
Abstract
Detection of entanglement through the Newtonian potential has been claimed to support the existence of gravitons, by extrapolating to a thought experiment which demonstrates that complementarity and causality would be in conflict unless quantum fluctuations exist. We critically assess this consistency argument using scalar field models. We show that whether complementarity or no-signalling is violated when quantum fluctuations are neglected, depends on how this approximation is taken, while in both cases entanglement is generated locally in spacetime. We clarify that the correct reading of the paradox requires making a clear distinction between two notions of causality violation: Newtonian action-at-a-distance and the quantum mechanical no-signalling; the latter is pertinent while the former is not. We conclude that the thought experiment (a) does not add to the epistemological relevance of entanglement through Newtonian potentials (b) lends support for the existence of gravitons, if retardation effects are detected in entanglement through gravity.
1 figure (minor clarifications with respect to V1)
References in corpus (37)
- A Spin Entanglement Witness for Quantum Gravity
- Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
- Quantum Superposition of Massive Objects and the Quantization of Gravity
- Harvesting correlations from the quantum vacuum
- Effective Field Theory Approach to Gravitationally Induced Decoherence
- Gravitational Decoherence
- On the possibility of laboratory evidence for quantum superposition of geometries
- Entanglement harvesting from the electromagnetic vacuum with hydrogenlike atoms
- Gravitationally Mediated Entanglement: Newtonian Field vs. Gravitons
- Can Gravitons Be Detected?
- Noise and decoherence induced by gravitons
- Massive quantum systems as interfaces of quantum mechanics and gravity
- A no-go theorem on the nature of the gravitational field beyond quantum theory
- Experiments testing macroscopic quantum superpositions must be slow
- Entanglement harvesting and divergences in quadratic Unruh-DeWitt detectors pairs
- Relativistic causality in particle detector models: Faster-than-light signalling and "Impossible measurements"
- Information Content of the Gravitational Field of a Quantum Superposition
- What gravity mediated entanglement can really tell us about quantum gravity
- On inference of quantization from gravitationally induced entanglement
- Gravity entanglement, quantum reference systems, degrees of freedom
- Harvesting entanglement from the gravitational vacuum
- Fully Relativistic Entanglement Harvesting
- Any consistent coupling between classical gravity and quantum matter is fundamentally irreversible
- Classical theories of gravity produce entanglement
- The role of quantum degrees of freedom of relativistic fields in quantum information protocols
- Complementarity and causal propagation of decoherence by measurement in relativistic quantum field theories
- Gravity Mediated Entanglement between Oscillators as Quantum Superposition of Geometries
- Consistency between causality and complementarity guaranteed by the Robertson inequality in quantum field theory
- Graviton physics: Quantum field theory of gravitons, graviton noise and gravitational decoherence -- a concise tutorial
- Entanglement Generation and Decoherence in a Two-Qubit System Mediated by Relativistic Quantum Field
- Effects of photon field on entanglement generation in charged particles
- The Diósi-Penrose model of classical gravity predicts gravitationally induced entanglement
- Closed-form expressions for smeared bi-distributions of a massless scalar field: non-perturbative and asymptotic results in relativistic quantum information
- Quantum uncertainty of gravitational field and entanglement in superposed massive particles
- Quantumness of gravitational field: A perspective on monogamy relation
- Circuit locality from relativistic locality in scalar field mediated entanglement
- Causality in relativistic quantum interactions without mediators