Universal Gate Set for Continuous-Variable Quantum Computation with Microwave Circuits
Artikel i vetenskaplig tidskrift, 2020

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. Here, we show that a realistic three-wave mixing microwave architecture based on the superconducting nonlinear asymmetric inductive element [Frattini et al., Appl. Phys. Lett. 110, 222603 (2017)] 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

Författare

Timo Hillmann

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Isaac Fernando Quijandria Diaz

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Göran Johansson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Alessandro Ferraro

Queen's University Belfast

Simone Gasparinetti

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

Giulia Ferrini

Chalmers, Mikroteknologi och nanovetenskap (MC2), Tillämpad kvantfysik

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 125 16 160501

Styrkeområden

Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

DOI

10.1103/PhysRevLett.125.160501

PubMed

33124848

Mer information

Senast uppdaterat

2020-11-10