In quantum mechanics, measurements are indeed interactions between particles, but they have unique characteristics and implications that distinguish them from ordinary interactions.
According to the standard interpretation of quantum mechanics, when a measurement is made on a quantum system, it causes the system to collapse into one of its possible states, known as an eigenstate, with a corresponding probability determined by the system's wave function. This collapse is often referred to as the "measurement problem" and is a topic of ongoing philosophical and theoretical debate.
In quantum mechanics, the act of measurement introduces uncertainty into the system. Prior to the measurement, the system can exist in a superposition of multiple states, where the particles involved are in a combination of different possible states simultaneously. However, the act of measurement "selects" one of these possibilities and reveals a definite outcome.
The process of measurement can involve interactions between particles, such as the interaction between a particle and a measuring device. However, the unique aspect of measurement in quantum mechanics is that it causes the system to transition from a superposition of states to a single observed state. This transition is non-deterministic and governed by probabilistic rules described by the mathematics of quantum mechanics.
It's worth noting that there are alternative interpretations of quantum mechanics, such as the many-worlds interpretation and the de Broglie-Bohm theory, which provide different explanations for the measurement process. However, the standard interpretation described above is widely taught and accepted in the scientific community.