Quantum effects can indeed be observed in objects with small mass but large volume, such as a tennis ball-sized bucky ball composed of a few hundred atoms. This phenomenon is known as quantum coherence, where the quantum properties of individual particles extend to macroscopic scales.
The double-slit experiment has been successfully performed not only with particles like electrons and photons but also with larger molecules, including bucky balls (fullerene molecules). These experiments demonstrate that quantum interference can occur with complex particles consisting of many atoms.
In the case of a double-slit experiment with bucky balls, the setup would be similar to the one used for electrons or photons. The bucky balls would be directed towards a barrier with two slits, and then a screen or detector would be placed behind to observe the resulting pattern.
However, there are some challenges when extending the double-slit experiment to larger particles. One major difficulty is maintaining the coherence of the bucky balls over a sufficiently long distance. The interactions with the environment, such as air molecules, can cause decoherence, which leads to the loss of interference effects.
Despite these challenges, experiments have been conducted that demonstrate quantum interference patterns with relatively large molecules, including bucky balls. These experiments require careful control of the experimental conditions to minimize decoherence and preserve the quantum coherence of the particles.
It's worth noting that as the mass and complexity of the objects increase, maintaining quantum coherence becomes more challenging. The delicate balance between isolation from the environment and preservation of coherence becomes harder to achieve.
Nonetheless, the possibility of observing quantum effects in larger objects continues to be an active area of research, and advancements in experimental techniques and technologies may provide further insights into the boundary between quantum and classical behavior.