Superconducting qubit-qutrit circuit: A toolbox for efficient quantum gates
Abstract
We propose a superconducting circuit which implements an effective tunable spin chain consisting of a qutrit (three-level system) coupled to two qubits (spin-1/2). In our paper we show the derivation leading to an effective spin-model system which has highly tunable qutrit energy levels and Heisenberg XXZ -like interactions between the three effective degrees of freedom. Our system can very efficiently accomplish various quantum information tasks, including entanglement of the two qubits and conditional three-qubit quantum gates such as the Toffoli and Fredkin gates. Furthermore, our system realizes a double-conditional non-adiabatic holonomic quantum gate. The efficiency, robustness, and universality of our circuit makes it a promising candidate to serve as a building block for larger spin networks capable of performing involved quantum computational tasks. We are currently working on a system implementing two qutrits, realizing an effective AKLT spin model.
Supported by the Carlsberg Foundation and the Danish Council for Independent Research under the DFF Sapere Aude program.- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..MARG70347B