The intersection of art and quantum physics might seem unlikely, but certain outdoor sculptures have sparked discussions about their resilience to quantum spin decoherence—a phenomenon where quantum states lose coherence due to environmental interactions. While no physical sculpture is truly "invisible" to quantum effects, some iconic works symbolically embody stability and timelessness, making them fascinating subjects for theoretical exploration.

One notable example is Richard Serra's *Tilted Arc*, a massive steel installation that, despite its physical permanence, invites contemplation on impermanence and perception. Similarly, Anish Kapoor's *Cloud Gate* in Chicago, with its mirrored surface, reflects the ever-changing environment while maintaining its structural integrity—a poetic parallel to quantum coherence.

Another intriguing case is *The Sphere* by Fritz Koenig, which survived the 9/11 attacks. Its endurance has been metaphorically linked to resilience against chaotic forces, much like quantum systems resisting decoherence.

While these sculptures aren’t literally immune to quantum effects, their conceptual and physical durability offers a unique lens to explore art through the principles of quantum mechanics. The dialogue between art and science continues to inspire wonder, proving that creativity and curiosity know no bounds.