Schrödinger cats for quantum internet
Optica Publishing Group (2018) fth4g.5
Fisher information for far-field linear optical superresolution via homodyne or heterodyne detection in a higher-order local oscillator mode
Physical Review A American Physical Society (APS) 96:6 (2017) 063829
Noise spectra in balanced optical detectors based on transimpedance amplifiers.
The Review of scientific instruments 88:11 (2017) 113109
Abstract:
We present a thorough theoretical analysis and experimental study of the shot and electronic noise spectra of a balanced optical detector based on an operational amplifier connected in a transimpedance scheme. We identify and quantify the primary parameters responsible for the limitations of the circuit, in particular, the bandwidth and shot-to-electronic noise clearance. We find that the shot noise spectrum can be made consistent with the second-order Butterworth filter, while the electronic noise grows linearly with the second power of the frequency. Good agreement between the theory and experiment is observed; however, the capacitances of the operational amplifier input and the photodiodes appear significantly higher than those specified in manufacturers' datasheets. This observation is confirmed by independent tests.Enlargement of optical Schrödinger's cat states
Nature Photonics Springer Nature 11:6 (2017) 379-382
Quantum teleportation between discrete and continuous encodings of an optical qubit
Physical Review Letters American Physical Society 118:16 (2017) 160501