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Probing the equation of state of the early universe with a space laser interferometer

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arxiv gr-qc/0305096 v1 pith:UP2YHL6Z submitted 2003-05-26 gr-qc hep-ph

Naoki Seto , Jun'Ichi Yokoyama This is my paper · ORCID
classification gr-qchep-ph
keywords universeearlyequationgravitationalstatewavebackgroundclearly
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abstract

We propose a method to probe the equation of state of the early universe and its evolution, using the stochastic gravitational wave background from inflation. A small deviation from purely radiation dominated universe ($w= 1/3$) would be clearly imprinted on the gravitational wave spectrum $\Omega_{GW}(f)$ due to the nearly scale invariant nature of inflationary generated waves.

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Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Leptogenesis with sub-electroweak-scale reheating temperature

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Leptogenesis remains viable for reheating temperatures below sphaleron freeze-out in three perturbative monomial-inflaton scenarios, with blue-tilted primordial GWs as a potential probe.

  2. Impact of memory-burdened black holes on primordial gravitational waves in light of Pulsar Timing Array

    astro-ph.CO 2024-11 conditional novelty 6.0 of 10

    Memory-burdened primordial black holes can explain pulsar timing array data as diluted blue-tilted gravitational waves and leave a testable high-frequency signal.

  3. Gravitational Wave Signatures of Cosmological Stasis: A Unified Spectral Template

    hep-ph 2026-07 conditional novelty 5.0 of 10

    Any constant-w stasis epoch imprints a closed-form IGWB template whose tilt α and amplitude step C² must lie on a single falsifiable consistency curve C²(α), resolvable by BBO/DECIGO.

  4. High Frequency Spectrum of Primordial Gravitational Waves

    hep-ph 2026-01 unverdicted novelty 5.0 of 10

    High-frequency primordial gravitational waves extend to higher frequencies due to post-inflation inflaton dynamics, and their detailed spectrum shape can distinguish inflation models.

  5. Leptogenesis in Brane-modified cosmology: Signatures in primordial gravitational waves

    hep-ph 2026-08 conditional novelty 4.0 of 10

    With one or two stiff kination epochs before radiation domination, vanilla leptogenesis can produce the observed baryon asymmetry while imprinting a blue-tilted gravitational-wave spectrum, leaving a small DECIGO-visi...

  6. From WIMP to FIMP during reheating: collider vs non-collider probes for p-wave annihilation

    hep-ph 2026-05 unverdicted novelty 4.0 of 10

    Collider experiments can strongly constrain p-wave-suppressed derivative operators and thereby limit reheating temperature, DM mass, and interaction scale needed to match observed DM abundance during reheating.

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