论文标题

纠缠和双副本

Entanglement and the Double Copy

论文作者

Cheung, Clifford, Remmen, Grant N.

论文摘要

我们构建了胶状的纠缠状态,这些状态完全像是重力群一样散射。在操作上,这些对象在波函数的级别上实现了双复制。我们的分析始于一般的ANSATZ,用于以$ {\ rm su}(n)$ gauge理论为单位的波函数。鉴于从置换不变性和尺寸分析之后的相对最小的假设,三粒子波函数产生的散射幅度会自动与重力(Modulo归一化)自动重合。对于五粒子散射,匹配不是自动的,但是在振幅上施加某些已知选择规则足以独特地重现重力。由此产生的幅度表现出通常的双复制关系的颜色饰面和置换不变的形式。我们计算两个轨距理论副本之间的纠缠熵,并了解到这些状态在$ n $中的最大输入。此外,这种方法立即扩展到有效的田间理论,在该理论中,出生的污染光子和加利益人可以像纠缠的粘合剂和乳头一样重新铸造。

We construct entangled states of gluons that scatter exactly as if they were gravitons. Operationally, these objects implement the double copy at the level of the wave function. Our analysis begins with a general ansatz for a wave function characterizing gluons in two copies of ${\rm SU}(N)$ gauge theory. Given relatively minimal assumptions following from permutation invariance and dimensional analysis, the three- and four-particle wave functions generate scattering amplitudes that automatically coincide exactly with gravity, modulo normalization. For five-particle scattering the match is not automatic but imposing certain known selection rules on the amplitude is sufficient to uniquely reproduce gravity. The resulting amplitudes exhibit a color-dressed and permutation-invariant form of the usual double copy relations. We compute the entanglement entropy between the two gauge theory copies and learn that these states are maximally-entangled at large $N$. Moreover, this approach extends immediately to effective field theories, where Born-Infeld photons and Galileons can be similarly recast as entangled gluons and pions.

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