DTU's photonic
quantum computing platform

Jonas S. Neergaard-Nielsen

bigQ, DTU Physics

We develop a scalable photonic QC platform using

  • continuous-variable measurement-based scheme (CV-MBQC)
  • squeezed states of light
  • fibre-optical linear networks
  • homodyne detection
  • Gottesman-Kitaev-Preskill (GKP) qubits
  • GKP + surface code error correction

standard gate model

measurement-based or one-way QC

circuits implemented by sequential measurements on a massively entangled cluster state

Continuous-variable MBQC

squeezed states

beam splitters

homodyne detection

time-multiplexed

reuse resources
        over and over

scales well!

Verifying inseparability

Implementing gates

Blueprint for fault-tolerant QC with GKP qubits and surface code

M. V. Larsen et al., Science 366, 369 (2019)

M. V. Larsen et al., Nat. Phys. 17, 1018 (2021)

M. V. Larsen et al., PRX Q 2, 030325 (2021) 

Abhinav Verma

Ulrik Andersen

Subhashish Barik

Casper Breum

Lucas Faria

Mikkel Larsen

DTU's photonic quantum computing platform

By Jonas Neergaard-Nielsen

DTU's photonic quantum computing platform

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