Constructing multi-target controlled phase gate in circuit QED and its applications

We present a one-step scheme in circuit quantum electrodynamics (QED) to realize multi-target controlled phase gates by using one microwave cavity that is coupled capacitively to a superconducting flux qutrit which plays the control role and simultaneously controls n target qutrits embedded in the m...

Full description

Saved in:
Bibliographic Details
Published in:Europhysics letters 2019-09, Vol.127 (5), p.50002
Main Authors: Han, Jin-Xuan, Wu, Jin-Lei, Wang, Yan, Xia, Yan, Song, Jie, Jiang, Yong-Yuan
Format: Article
Language:English
Subjects:
03.65.Ud
03.67.Lx
03.67.Mn
Entangled states
Gates (circuits)
Quantum electrodynamics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present a one-step scheme in circuit quantum electrodynamics (QED) to realize multi-target controlled phase gates by using one microwave cavity that is coupled capacitively to a superconducting flux qutrit which plays the control role and simultaneously controls n target qutrits embedded in the microwave cavity. A strong classical field is imposed on the control qutrit so as to yield two dressed states, one of which is coded as a logical state. The controlled phase gates can be employed to achieve the creation of entangled states deterministically without any measurement, including the Bell state, the GHZ state, and the cluster state. Numerical simulations demonstrate that the high-fidelity creation of the entangled state is feasible with the constructed controlled phase gate under the present circuit QED technology.
ISSN:0295-5075
1286-4854
1286-4854
DOI:10.1209/0295-5075/127/50002