Joshua J. Guanzon

University of Queensland

Multi-mode optical fiberQuantum entanglementPhysicsStatistical physicsTopologyMatrix (mathematics)Limit (mathematics)PhotonKey distributionEntanglement distillationInterferometrySet (abstract data type)Quantum channelMonte Carlo methodMetrologyBeam splitterAstronomical interferometerCoincidenceGenerator (mathematics)Quantum interferenceComputer scienceTwo-photon excitation microscopyQuantum information scienceClassical limitTransmission coefficientQuantum computerQuantum mechanicsRepeaterQuantumQuantum key distribution

4Publications

2H-index

0Citations

Publications 5

Newest

#1Joshua J. GuanzonH-Index: 2

#2Matthew S. WinnelH-Index: 2

Last. Timothy C. RalphH-Index: 78

view all 4 authors...

We introduce a linear optical technique that can implement ideal quantum tele-amplification up to the n^\mathrm{th}Fock state, where ncan be any positive integer. Here tele-amplification consists of both quantum teleportation and noiseless linear amplification (NLA). This simple protocol consists of a beam-splitter and an (n+1)splitter, with nancillary photons and detection of nphotons. For a given target fidelity, our technique improves success probability and physical resource c...

#1Joshua J. Guanzon (UQ: University of Queensland)H-Index: 2

#2Austin P. Lund (FU: Free University of Berlin)H-Index: 19

Last. Timothy C. Ralph (UQ: University of Queensland)H-Index: 78

view all 3 authors...

Scattershot photon sources are known to have useful properties for optical quantum computing purposes, in particular for scaling to large numbers of photons. This paper investigates the application of these scattershot sources towards the metrological task of estimating an unknown phase shift. In this regard, we introduce three different scalable multimode interferometers, and quantify their quantum Fisher information performance using scattershot sources with arbitrary system sizes. We show tha...

Overcoming the repeaterless bound in continuous-variable quantum communication without quantum memories

#1Matthew S. WinnelH-Index: 2

#2Joshua J. GuanzonH-Index: 2

Last. Timothy C. RalphH-Index: 78

view all 4 authors...

One of the main problems in quantum communications is how to achieve high rates at long distances. Quantum repeaters, i.e., untrusted, intermediate relay stations, are necessary to overcome the repeaterless bound which sets the fundamental rate-distance limit of repeaterless communications. In this work, we introduce a continuous-variable protocol which overcomes the repeaterless bound and scales like the single-repeater bound using just one linear-optical device called a "quantum scissor", comb...

#1Joshua J. GuanzonH-Index: 2

#2Austin P. LundH-Index: 19

Last. Timothy C. RalphH-Index: 78

view all 3 authors...

We describe a multi-mode passive linear optical network which emulates the two-photon number statistics of a beam splitter, irrespective on where the two photons enter the network. This is done by firstly defining general properties that the generator of the network matrix must fulfil. We then show that the network's effective transmission coefficient can be freely set to replicate either the absence of coincidence counts (i.e. the Hong-Ou-Mandel dip), or a 100% coincidence rate, as well as all ...

#1Joshua J. GuanzonH-Index: 2

#2Austin P. LundH-Index: 19

Last. Timothy C. RalphH-Index: 78

view all 3 authors...

We describe a multi-mode passive linear optical network which emulates the two-photon number statistics of a beam splitter, irrespective on where the two photons enter the network. This is done by firstly defining general properties that the generator of the network matrix must fulfil. We then show that the network's effective transmission coefficient can be freely set to replicate either the absence of coincidence counts (i.e. the Hong-Ou-Mandel dip), or a 100% coincidence rate, as well as all ...

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