标题： 相对论弦理论中卡罗尔极限的非等价性 显示英文标题

标题： Non equivalence of Carroll limits in relativistic string theory

摘要： 我们在平坦空间中构建新的卡洛尔弦，方法是考虑经典水平上等价的相对论弦理论的卡洛尔极限。 在该极限下，这些卡洛尔弦不再等价，并且具有不同的自由度。 这一事实是由于一种普遍的现象：在起始拉格朗日变量和参数的奇异重新定义之后，构型空间和规范拉格朗日不再等价。 显示英文摘要

摘要： We construct new Carroll strings in flat space by considering the Carroll limit of equivalent relativistic string theories at classical level. In the limit these Carroll strings are no longer equivalent and have different degrees of freedom. This fact is due to a general phenomenon that the configuration space and canonical Lagrangians are no longer equivalent after a singular redefinition of the variables and of the parameters of the starting Lagrangians.