Yes, a common example is the quantum harmonic oscillator, which could be a particle confined in a potential well. For instance, an electron trapped in a quantum dot (a nanoscale semiconductor structure) can behave like a quantum harmonic oscillator. By applying external electromagnetic pulses, the electron can be excited from the ground state to the first excited state, resulting in the wave function oscillating between the two states. This leads to oscillations in the electron's probability distribution that can be measured experimentally. The frequency and amplitude of the oscillations depends on the details of the external pulses and the system's parameters. This is a direct observation of quantum interference between the two states of the harmonic oscillator.
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