"Despite the challenges posed by the rapidly evolving field of quantum computing, researchers are optimistic about its potential applications. Quantum computers harness the principles of quantum mechanics, allowing them to perform complex calculations at speeds unattainable by classical computers. Moreover, quantum computing holds promise in solving problems related to cryptography, optimization, and simulating quantum systems."

What is the primary function of the phrase "Despite the challenges posed by the rapidly evolving field of quantum computing" in the paragraph?