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<p>We utilize various computational techniques in flat and curved backgrounds to calculate the classical gravitational Compton amplitude up to the second post-Minkowskian order. Our novel result supports the use of worldline effective field theory in non-trivial background spacetimes to obtain new theoretical insights that can both enhance computational efficiency and provide useful cross-checks of results, particularly in the context of classical binary black hole mergers.</p>

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The gravitational Compton amplitude from flat and curved spacetimes at second post-Minkowskian order

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月29日

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  • N. Emil J. Bjerrum-Bohr,
  • Gang Chen,
  • Carl Jordan Eriksen,
  • Nabha Shah

摘要

We utilize various computational techniques in flat and curved backgrounds to calculate the classical gravitational Compton amplitude up to the second post-Minkowskian order. Our novel result supports the use of worldline effective field theory in non-trivial background spacetimes to obtain new theoretical insights that can both enhance computational efficiency and provide useful cross-checks of results, particularly in the context of classical binary black hole mergers.