Quantum mechanics, through the Heisenberg uncertainty principle, imposeslimits to the precision of measurement. Conventional measurement techniquestypically fail to reach these limits. Conventional bounds to the precision ofmeasurements such as the shot noise limit or the standard quantum limit are notas fundamental as the Heisenberg limits, and can be beaten using quantumstrategies that employ `quantum tricks' such as squeezing and entanglement.
展开▼
