Requirements for fault-tolerant quantum computation with cavity-QED-based atom-atom gates mediated by a photon with a finite pulse length
arXiv:2104.00945 · doi:10.1103/PhysRevA.104.043702
Abstract
We analyze the requirements for fault-tolerant quantum computation with atom-atom gates based on cavity quantum electrodynamics (cQED) mediated by a photon with a finite pulse length. For short photon pulses, the distorted shape of the reflected pulses from the cQED system is a serious error source. We optimize the cQED system parameters to minimize the infidelity due to the shape distortion and the photon losses in a well-balanced manner for the fault-tolerant scheme using probabilistic gates [H. Goto and K. Ichimura, Phys. Rev. A 80, 040303(R) (2009)]. Our optimization greatly relaxes the requirements for fault-tolerant quantum computation in some parameter regions, compared with the conventional optimization method where only the photon loss is minimized without considering the shape distortion [H. Goto and K. Ichimura, Phys. Rev. A 82, 032311 (2010)]. Finally, we show that reducing the cavity length is an effective way to reduce the errors of this type of gate in the case of short photon pulses.
arXiv comment10 pages, 10 figures, 2 tables
References in corpus (17)
- Quantum Computing with Very Noisy Devices
- Cavity-based quantum networks with single atoms and optical photons
- Scalable photonic quantum computation through cavity-assisted interaction
- Fault-tolerant quantum computation with high threshold in two dimensions
- A simple formula for the average gate fidelity of a quantum dynamical operation
- A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
- A photon-photon quantum gate based on a single atom in an optical resonator
- Robust quantum gates on neutral atoms with cavity-assisted photon-scattering
- Nondestructive Detection of an Optical Photon
- A Quantum-Logic Gate between Distant Quantum-Network Modules
- Realizing Quantum Controlled Phase Flip through Cavity-QED
- Deterministic photon-photon (SWAP)^{1/2} gate using a lambda system
- Single Photons Made-to-Measure
- A Deterministic and Nondestructively-Verifiable Photon Number Source
- Fundamental Limit on the Efficiency of Single-Photon Generation Based on Cavity Quantum Electrodynamics
- Ultra-low-loss nanofiber Fabry-Pérot cavities optimized for cavity quantum electrodynamics
- Partially Nondestructive Continuous Detection of Individual Traveling Optical Photons