标题： 具有扩展对称代数的卡罗尔弦 显示英文标题

标题： Carroll Strings with an Extended Symmetry Algebra

摘要： 从Polyakov作用量出发，我们考虑目标空间中的两种不同的Carroll极限，同时保持弦世界面的相对论性。 由此得到的磁性和手性Carroll弦模型表现出不同的对称性和动力学。 这两个模型都具有无限维的对称代数，并且Carroll对称性包含在一个有限维子代数中。 对于磁性模型，这是所谓的弦Carroll代数。 手性模型实现了弦Carroll代数的扩展版本。 磁性模型没有横向弦激发。 手性模型较为宽松，包括任意携带横向动量的左移模式，但这些模式在目标空间中不贡献能量。 显示英文摘要

摘要： Starting from the Polyakov action we consider two distinct Carroll limits in target space, keeping the string worldsheet relativistic. The resulting magnetic and chiral Carroll string models exhibit different symmetries and dynamics. Both models have an infinite dimensional symmetry algebra with Carroll symmetry included in a finite dimensional subalgebra. For the magnetic model, this is the so-called string Carroll algebra. The chiral model realises an extended version of the string Carroll algebra. The magnetic model does not have any transverse string excitations. The chiral model is less restrictive and includes arbitrary left-moving modes that carry transverse momentum but do not contribute to the energy in target space.