To study quantum effects, particles must be nearly still. Trapping techniques provide the controlled environment necessary for these observations.
: Squeezed vacuum states are now used in LIGO to detect gravitational waves by reducing background quantum noise. Quantum Optics Including Noise Reduction, Trapp...
: Use electromagnetic fields to suspend charged particles, forming the most stable qubits currently available for quantum computing. Quantum State Engineering To study quantum effects, particles must be nearly still
: Use focused laser beams to hold microscopic objects or single atoms in place via radiation pressure. To study quantum effects
Modern labs don't just observe quantum states; they build them. This engineering is the "software" of the quantum world.