论文标题
域墙壁歼灭 - QFT的视角
Domain wall annihilation -- a QFT perspective
论文作者
论文摘要
早期宇宙中的域墙网络在自发破坏离散对称性的情况下形成，对宇宙学产生了巨大影响。但是，它们仍然没有探索。我们引入了一种新的分析策略，以更好地了解从组成到歼灭的域壁时期。我们的方法包括对域壁形成和时间演化的初始状态的量子场理论处理。我们发现，在$ d+1 $ dimensional flat时空中具有偏见初始条件的网络的域墙面积密度随着$ t^{ - 1/2} \，\ exp \ big（ - （t/t_ {ann}）^{d/2} \ big）$。我们对在凝结物质和宇宙学中获得的这一结果和先前结果之间的关系评论。该法律向扩展的宇宙推断适用于接近域墙“气体”极限的网络。
Domain wall networks in the early universe, formed upon spontaneous breaking of a discrete symmetry, have a rich impact on cosmology. Yet, they remain somewhat unexplored. We introduce a new analytic strategy to understand better the domain wall epoch, from formation to annihilation. Our method includes a quantum field theoretical treatment of the initial state at domain wall formation, as well as of the time evolution. We find that the domain wall area density for a network with biased initial condition in $d+1$ dimensional flat spacetime evolves as $t^{-1/2}\,\exp\big(- (t/t_{ann})^{d/2}\big)$. We comment on the relation between this and previous results obtained in condensed matter and in cosmology. The extrapolation of this law to an expanding universe applies to networks that are close to the domain wall `gas' limit.
