Freely Scalable Quantum Technologies using Cells of 5-to-50 Qubits with Very Lossy and Noisy Photonic Links
By Naomi H. Nickerson, Joseph Francis Fitzsimons, Simon C. Benjamin. 2014
228 citations recorded by the source corpus.
Exquisite quantum control has now been achieved in small ion traps, in nitrogen-vacancy centres and in superconducting qubit clusters. We can regard such a system as a universal cell with diverse technological uses from communication to large-scale computing, provided that the cell is able to network with others and overcome any noise in the interlinks. Here we show that loss-tolerant entanglement purification makes quantum computing feasible with the noisy and lossy links that are realistic today: With a modestly complex cell design, and using a surface code protocol with a network noise threshold of 13.3%, we find that interlinks which attempt entanglement at a rate of 2MHz but suffer 98% photon loss can result in kilohertz computer clock speeds (i.e. rate of high fidelity stabilizer measurements). Improved links would dramatically increase the clock speed. Our simulations employed local gates of a fidelity already achieved in ion trap devices.
Subfields: Artificial Intelligence
View Paper: https://www.semanticscholar.org/paper/2b3956b25bf153c27c7d9dc99fb4568d2738667f
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Citations in the corpus
- Why I am optimistic about the silicon-photonic route to quantum computing (2016, background): “However the architecture has obvious potential for hybrid light/matter approaches, as well as networks of PICs with lossy interconnects [66, 67], and these should be investigated further.”
- Quantum error correction: an introductory guide (2019, background): “onducting devices with the long21 July 26, 2019 term goal of realising a surface code logical qubit. Other efforts are currently underway pursuing qubit architectures based on ion-trap trap technology [48] and quantum optics [6]. The threshold for the surface code under a realistic noise assumptions ”
- Integrated Quantum Photonics with Silicon Carbide: Challenges and Prospects (2020, background): “1) and will require the integration of spin-qubit registers with high-quality photonic structures and efficient photon detectors to reduce the total photon loss below the demanding thresholds for quantum computing [15].”
- Deterministic delivery of remote entanglement on a quantum network (2017, background): “Exceeding this threshold is central to allowing multiple entangled links to be created and maintained simultaneously, as required for the distribution of manybody quantum states across a network [6, 15].”