Thread by @fgrosshans

Now at #JapanEUWorkshop, Shuntaro Takeda on A strategy for large-scale optical quantum computing #LTQI

Shuntaro Takeda: use a deterministic approach, a loop to increase scalability. Determinism is brought by continuous variable (CV) system, which need 5 gates to be universal: 3 linear, squeezing and cubic gate (the hard one) #LTQI #JapanEUWorkshop

Shuntaro Takeda: both discrete CNOT and CV cubit gates need χ⁽³⁾ and are therefore difficult, but the latter is at least deterministic.
#LTQI #JapanEUWorkshop

Shuntaro Takeda: all the gates can be made by preparing ancilla states, + linear optics, homodyne measurement and EOM. These teleportation gates allow to shift all the nonlinearity into the preparation of the resource. #LTQI #JapanEUWorkshop

Shuntaro Takeda: CV encoding is more sensitive to losses than the qubits. A hybrid approach allows to avoid some current limitations #LTQI #JapanEUWorkshop

Shuntaro Takeda‘s proposal for a universal teleportation based gate in a loop arXiv:1706.06312 arxiv.org/abs/1706.06312 PRL 119 120504 doi.org/10.1103/PhysRe…
#LTQI #JapanEUWorkshop

Shutaro Takeda’s other papers cited in this talk :
* arXiv:1402.4895 arxiv.org/abs/1402.4895 / Nature 500 315 dx.doi.org/10.1038/nature…
* arXiv:1411.1310 arxiv.org/abs/1411.1310 / PRL 114 100501 journals.aps.org/prl/abstract/1…
#LQI #JapanEUWorkshop