Animation of the <a href="https://en.wikipedia.org/wiki/Wave_function" class="extiw" title="en:Wave function">quantum wave functions</a> of <a href="https://en.wikipedia.org/wiki/Fock_state" class="extiw" title="en:Fock state">Fock states</a> with n=0..3 in a <a href="https://en.wikipedia.org/wiki/Quantum_harmonic_oscillator" class="extiw" title="en:Quantum harmonic oscillator">Quantum harmonic oscillator</a>. The <a href="https://en.wikipedia.org/wiki/Probability_distribution" class="extiw" title="en:Probability distribution">probability distributions</a> are drawn along the ordinate, while the phase is encoded by color. The <a href="https://en.wikipedia.org/wiki/Hermite_functions" class="extiw" title="en:Hermite functions">Hermite function</a> <a href="https://en.wikipedia.org/wiki/Wave_packet" class="extiw" title="en:Wave packet">wave packets</a> are static in time but their quantum phase changes due to <a href="https://en.wikipedia.org/wiki/Vacuum_energy" class="extiw" title="en:Vacuum energy">vacuum energy</a>.
<a href="//commons.wikimedia.org/wiki/User:Geek3" title="User:Geek3">Geek3</a>
CC BY 3.0
This  plot was created with <a href="https://en.wikipedia.org/wiki/Matplotlib" class="extiw" title="w:Matplotlib">Matplotlib</a>.