施加简单性约束的一种更简单的方法
A simpler way of imposing simplicity constraints
摘要：
我们研究了一种在我们最近引入的全纯自旋泡沫模型中施加简单约束的方法。与通常在边界自旋网络上施加约束不同，可以直接在自旋泡沫传播器上施加约束。我们发现，这两种方法有相同的领先的渐近行为，出现在高阶的差异。这使我们能够获得一个模型，大大简化了计算，但仍然有雷奇演算作为其半经典的限制。
英文摘要：
We investigate a way of imposing simplicity constraints in a holomorphic Spin Foam model that we recently introduced. Rather than imposing the constraints on the boundary spin network, as is usually done, one can impose the constraints directly on the Spin Foam propagator. We find that the two approaches have the same leading asymptotic behaviour, with differences appearing at higher order. This allows us to obtain a model that greatly simplifies calculations, but still has Regge Calculus as its semi-classical limit.
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