Which of the following quantum states is specifically engineered to surpass the standard quantum limit (SQL) in precision measurements?
Question 2
In quantum imaging, what is the primary advantage of using 'ghost imaging' techniques that rely on quantum correlations?
Question 3
Consider a quantum sensor utilizing a spin ensemble. If the coherence time of the spins is $\tau_c$ and the measurement time is $T$, what is the optimal strategy to maximize sensitivity, assuming $T < \tau_c$?
Question 4
Which of the following best describes the 'quantum advantage' in quantum sensing?
Question 5
In quantum metrology, what is the primary benefit of using quantum states like squeezed states or entangled states?
