4 papers
Cascading amplifiers can create exponentially large coherence
Lucas A. Ostrowski, Giacomo Pantaleoni, Howard M. Wiseman +1
A standard laser beam has photon degeneracy, or coherence, , of at most , where is the number of photons in the laser itself. Even quantum-engineered lase…
Gaussian dynamics in the double Siegel disk
Giacomo Pantaleoni, Nicolas C. Menicucci
We show that deterministic multimode Gaussian channels admit a symmetric-space description. Passing from the n-mode Siegel disk to a doubled version of that space lets general Gaus…
Linear-optical quantum computation with arbitrary error-correcting codes
Blayney W. Walshe, Ben Q. Baragiola, Hugo Ferretti +11
High-rate quantum error correcting codes mitigate the imposing scale of fault-tolerant quantum computers but require efficient generation of non-local, many-body entanglement. We p…
Selection and improvement of product formulae for best performance of quantum simulation
Mauro E. S. Morales, Pedro C. S. Costa, Giacomo Pantaleoni +3
Quantum algorithms for simulation of Hamiltonian evolution are often based on product formulae. The fractal methods give a systematic way to find arbitrarily high-order product for…