Coarse-grained homodyne detection with as few as two bins enables phase estimation beyond the standard quantum limit with Heisenberg scaling in a squeezed-light interferometer.
Tseet al., Quantum-enhanced advanced LIGO detectors in the era of gravitational-wave astronomy, Phys
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Quantum Metrology under Coarse-Grained Measurement
Coarse-grained homodyne detection with as few as two bins enables phase estimation beyond the standard quantum limit with Heisenberg scaling in a squeezed-light interferometer.