Universal Gate Set for Continuous-Variable Quantum Computation with Microwave Circuits
ORAL
Abstract
We provide an explicit construction of a universal gate set for continuous-variable quantum computation with microwave circuits. Such a universal set has been first proposed in quantum-optical setups, but its experimental implementation has remained elusive in that domain due to the difficulties in engineering strong nonlinearities. We show that a realistic three-wave mixing microwave architecture based on the superconducting nonlinear asymmetric inductive element [1] allows us to overcome this difficulty.
As an application, we show that this architecture allows for the generation of a cubic phase state with an experimentally feasible procedure. This work highlights a practical advantage of microwave circuits with respect to optical systems for the purpose of engineering non-Gaussian states and opens the quest for continuous-variable algorithms based on few repetitions of elementary gates from the continuous-variable universal set.
Ref. [1] Frattini et al., Appl. Phys. Lett. 110, 222603 (2017).
As an application, we show that this architecture allows for the generation of a cubic phase state with an experimentally feasible procedure. This work highlights a practical advantage of microwave circuits with respect to optical systems for the purpose of engineering non-Gaussian states and opens the quest for continuous-variable algorithms based on few repetitions of elementary gates from the continuous-variable universal set.
Ref. [1] Frattini et al., Appl. Phys. Lett. 110, 222603 (2017).
*F.Q, G.J., S.G., and G.F. acknowledge support from the Knut and Alice Wallenberg Foundation through the WACQT. G.F. acknowledges support from the Swedish Research Council through the project grant QuACVA. T.H. acknowledges support from by the Deutsche Forschungsgemeinschaft via RTG 1995.
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Presenters
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Timo Hillmann
- Chalmers Univ of Tech