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An On-chip Homodyne Detector for Measuring Quantum States and Generating Random Numbers
Francesco Raffaelli, Giacomo Ferranti, Dylan H. Mahler +7
Optical homodyne detection has found use in a range of quantum technologies as both a characterisation tool and as a way to post-selectively generate non-linearities. So far optica…
Demonstrating an absolute quantum advantage in direct absorption measurement
Paul-Antoine Moreau, Javier Sabines-Chesterking, Rebecca Whittaker +5
Engineering apparatus that harness quantum theory offers practical advantages over current technology. A fundamentally more powerful prospect is the long-standing prediction that s…
Sub-shot-noise transmission measurement using optically gated single photons
J. Sabines-Chesterking, R. Whittaker, S. K. Joshi +7
Harnessing the unique properties of quantum mechanics offers the possibility to deliver new technologies that can fundamentally outperform their classical counterparts. These techn…
Quantum-enhanced phase estimation using optical spin squeezing
Takafumi Ono, Javier Sabines Chesterking, Hugo Cable +2
Quantum metrology enables estimation of optical phase shifts with precision beyond the shot-noise limit. One way to exceed this limit is to use squeezed states, where the quantum n…
Beating the Shot-Noise Limit with Sources of Partially-Distinguishable Photons
Patrick M. Birchall, Javier Sabines-Chesterking, Jeremy L. O'Brien +2
Quantum metrology promises high-precision measurements beyond the capability of any classical techniques, and has the potential to be integral to investigative techniques. However,…
The Quantum-Classical Boundary for Precision Interferometric Measurements
Patrick M. Birchall, Jeremy L. O'Brien, Jonathan C. F. Matthews +1
Understanding the fundamental limits on the precision to which an optical phase can be estimated is of key interest for many investigative techniques utilized across science and te…