Universal control of a bosonic mode via drive-activated native cubic interactions
Artikel i vetenskaplig tidskrift, 2024
Linear bosonic modes offer a hardware-efficient alternative for quantum information processing but require access to some nonlinearity for universal control. The lack of nonlinearity in photonics has led to encoded measurement-based quantum computing, which relies on linear operations but requires access to resourceful (’nonlinear’) quantum states, such as cubic phase states. In contrast, superconducting microwave circuits offer engineerable nonlinearities but suffer from static Kerr nonlinearity. Here, we demonstrate universal control of a bosonic mode composed of a superconducting nonlinear asymmetric inductive element (SNAIL) resonator, enabled by native nonlinearities in the SNAIL element. We suppress static nonlinearities by operating the SNAIL in the vicinity of its Kerr-free point and dynamically activate nonlinearities up to third order by fast flux pulses. We experimentally realize a universal set of generalized squeezing operations, as well as the cubic phase gate, and exploit them to deterministically prepare a cubic phase state in 60 ns. Our results initiate the experimental field of polynomial quantum computing, in the continuous-variables notion originally introduced by Lloyd and Braunstein.
Författare
Axel Eriksson
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Théo Sépulcre
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Mikael Kervinen
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Timo Hillmann
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Marina Kudra
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Simon Dupouy
Student vid Chalmers
Yong Lu
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Universität Stuttgart
Maryam Khanahmadi
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Jiaying Yang
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Claudia Castillo-Moreno
Per Delsing
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Simone Gasparinetti
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 15 1 2512Ämneskategorier
Atom- och molekylfysik och optik
Annan fysik
Reglerteknik
Den kondenserade materiens fysik
DOI
10.1038/s41467-024-46507-1
PubMed
38509084