Leveraging the rapid development of quantum simulators, the intriguing phenomena of quantum strings are observed across various quantum simulation platforms. However, the complex interplay between the quantum strings cannot be well analyzed due to the limited system size in real quantum simulators. Here, with the help of a recently developed quantum Monte Carlo method, we can simulate a larger-scale Kagome Rydberg atom array, providing an ideal playground for studying quantum strings. By introducing an edge pinning method, the ends of a quantum string can be attached to the edges so that the flexible manipulation of the quantum string becomes possible. Due to the geometric constraint, the quantum strings are unidirectional, which strongly complicates their interplay. To quantitatively describe the quantum string, we built a one-dimensional effective model. With both analytic and numerical methods, rich physics can be found, including “geometric breaking,” a heartlike superposition state of quantum strings, and attractive interstring interactions. This work can benefit the comprehension of quantum strings and may also shed light on the simulation of high-energy physics.

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• Dipolar Rydberg atoms
• Frustrated magnetism
• Topological defects
• Kagome lattice
• Quantum many-body systems