Multi-mode superconducting circuits for realizing strongly coupled multi-qubit processor units

Autor:	Roy, Tanay, Chand, Madhavi, Bhattacharjee, Anirban, Hazra, Sumeru, Kundu, Suman, Damle, Kedar, Vijay, R.
Rok vydání:	2017
Předmět:	Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. A 98, 052318 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.98.052318
Popis:	Inter-qubit coupling and qubit connectivity in a processor are crucial for achieving high fidelity multi-qubit gates and efficient implementation of quantum algorithms. Typical superconducting processors employ relatively weak transverse inter-qubit coupling which are activated via frequency tuning or microwave drives. Here, we propose a class of multi-mode superconducting circuits which realize multiple transmon qubits with all-to-all longitudinal coupling. These "artificial molecules" directly implement a multi-dimensional Hilbert space that can be easily manipulated due to the always-on longitudinal coupling. We describe the basic technique to analyze such circuits, compute the relevant properties and discuss how to optimize them to create efficient small-scale quantum processors with universal programmability. Comment: 16 pages, 12 figures; Revised version with three new sections and updated references
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1711.01658 Zobrazit plný text záznamu View this record from Arxiv