📡 Quantum Sensing & Metrology
Precision measurements beyond classical limits
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Quantum Key Distribution
🎯 Measuring the Unmeasurable
Quantum sensing exploits quantum phenomena—superposition, entanglement, and squeezing—to achieve measurement precision beyond classical limits. These sensors detect magnetic fields, gravitational waves, time intervals, and rotation with unprecedented accuracy.
💡 The Standard Quantum Limit
Classical sensors hit the shot noise limit: precision scales as 1/√N (N measurements). Quantum sensors using entanglement achieve Heisenberg limit: 1/N scaling—quadratic improvement! This enables atomic clocks accurate to 1 second in 30 billion years.
Classical limit:σ ∝ 1/√N
Heisenberg limit:σ ∝ 1/N
🎯 What You'll Master
⚛️
Quantum Principles
Entanglement, squeezing, coherence
🔬
Sensor Technologies
Clocks, magnetometers, gravimeters
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Real-World Applications
GPS, medical imaging, geophysics
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Future Technologies
Gravitational wave detection, dark matter
📊 Classical vs Quantum Sensors
🔧Classical Sensors
Precision:Shot noise
Scaling:1/√N
Limit:SQL
⚛️Quantum Sensors
Precision:Sub-SQL
Scaling:1/N
Limit:Heisenberg