Quantum Memory in Scalar-Induced Gravitational Waves

• URL: http://arxiv.org/abs/2606.21835v1
• Date: Sat, 20 Jun 2026 02:02:25 GMT
• Title: Quantum Memory in Scalar-Induced Gravitational Waves
• Abstract summary: Scalar-induced gravitational waves are usually treated as a classical background sourced by phase-random curvatures.<n>We show that this description can miss residual quantum information.<n>We identify the connected covariance and phase-sensitive strain correlations as probes of primordial quantum coherence in secondary gravitational-wave backgrounds.
• Score: 1.4975436239088316
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Scalar-induced gravitational waves are usually treated as a classical stochastic background sourced by phase-random curvature perturbations. We show that this description can miss residual quantum information. Starting from a decohered two-mode Gaussian scalar state, we derive explicit transfer relations between the scalar anomalous coherence and the covariance matrix of induced tensor modes. For a localized scalar power spectrum, the ordinary tensor power is sourced by scalar power contractions, whereas the opposite-mode tensor coherence is sourced by scalar anomalous-coherence contractions. This coherence can generate nonzero tensor discord and a connected tensor-power covariance even after scalar entanglement has vanished. We identify the connected covariance and phase-sensitive strain correlations as probes of primordial quantum coherence in secondary gravitational-wave backgrounds, and discuss their possible relevance for future space-based interferometers and pulsar timing arrays.

Related papers

• Bell nonlocality from twisted statistics [39.146761527401424]
  We investigate Bell correlations for a free real quantum scalar field on the noncommutative Moyal plane.<n>We show that suitable local mode measurements lead to a violation of the CHSH Bell inequality.
  arXiv  Detail & Related papers  (2026-08-06T17:55:50Z)
• Decoherence Effects on Primordial Black Holes and Scalar-Induced Gravitational Waves [1.4975436239088316]
  Primordial black holes (PBHs) form when large primordial curvature perturbations re-enter the Hubble radius and exceed the classical collapse threshold.<n>We develop a conservative extension of the standard PBH and scalar-induced gravitational-wave framework.
  arXiv  Detail & Related papers  (2026-07-03T04:12:36Z)
• Entanglement, Discord, and Residual Coherence in Scalar-Induced Gravitational Waves [1.4975436239088316]
  We investigate whether residual quantum-information properties of the scalar sector can survive decoherence and leave imprints in the induced tensor background.<n>Our results suggest that scalar-induced gravitational waves may offer a new probe of primordial quantum correlations beyond entanglement.
  arXiv  Detail & Related papers  (2026-06-20T06:37:34Z)
• Large Fluctuations in Open Quantum Systems [0.0]
  We study statistics of atypical measurement outcomes in the steady states of driven open quantum systems.<n>We show that this property is generically lost in driven dissipative systems.
  arXiv  Detail & Related papers  (2026-06-10T08:56:39Z)
• Torsion-induced gauge structure in curved quantum waveguides [2.679171884680826]
  We investigate the quantum dynamics of a particle confined to a space curve within the thin-layer quantization framework.<n>Using a projection-based derivation in a co-rotating Frenet-frame basis, we show that this effective gauge potential is directly determined by the local torsion of the curve.
  arXiv  Detail & Related papers  (2026-06-02T14:45:28Z)
• Geometric curvature driven by many-body collective fluctuations [45.88028371034407]
  Recently, it has been emphasized that quantum geometry can be interpreted in terms of quantum dipole fluctuations in the ground state driven by interband mixing.<n>Here, we extend this picture to include contributions from many-body collective fluctuations.<n>We show that contributions from collective fluctuations can be experimentally distinguished from bare band-geometric contributions.
  arXiv  Detail & Related papers  (2026-05-19T13:13:37Z)
• Continuum field theory of matchgate tensor network ensembles [36.94429692322632]
  We develop a continuum description for random ensembles of two-dimensional fermionic matchgate tensor networks.<n>As a diagnostic of the resulting universal physics, we analyze disorder-averaged moments of fermionic two-point functions.<n>We show that disorder drives universal long-distance behavior governed by a nonlinear sigma-model of symmetry class D with a topological term.
  arXiv  Detail & Related papers  (2026-03-06T12:15:35Z)
• Symmetry-protected topology and deconfined solitons in a multi-link $\mathbb{Z}_2$ gauge theory [45.88028371034407]
  We study a $mathbbZ$ lattice gauge theory defined on a multi-graph with links that can be visualized as great circles of a spherical shell.<n>We show that this leads to state-dependent tunneling amplitudes underlying a phenomenon analogous to the Peierls instability.<n>By performining a detailed analysis based on matrix product states, we prove that charge deconfinement emerges as a consequence of charge-fractionalization.
  arXiv  Detail & Related papers  (2026-03-02T22:59:25Z)
• Diffusion in the stochastic Klein-Gordon equation [0.0]
  We study the phenomenology of linearised classical-quantum hybrid gravity.<n>In particular, we describe how to compute the non-equilibrium two point function of the scalar field.<n>We conclude by discussing possible implications of anomalous diffusion for hybrid theories of gravity.
  arXiv  Detail & Related papers  (2025-11-13T19:00:07Z)
• Quantized Thouless pumps protected by interactions in dimerized Rydberg tweezer arrays [41.94295877935867]
  In the noninteracting case, quantized Thouless pumps can only occur when a topological singularity is encircled adiabatically. In the presence of interactions, such topological transport can even persist for exotic paths in which the system gets arbitrarily close to the noninteracting singularity.
  arXiv  Detail & Related papers  (2024-02-14T16:58:21Z)
• Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations [77.34726150561087]
  The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems. Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations. Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
  arXiv  Detail & Related papers  (2020-07-20T18:00:02Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.