Creation of superposition of arbitrary states encoded in two high-Q cavities
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2019-09-12 |
| Journal | Optics Express |
| Authors | Tong Liu, Yang Zhang, Bao-qing Guo, Changâshui Yu, WeiâNing Zhang |
| Institutions | Dalian University of Technology, Institute of Theoretical Physics |
| Citations | 2 |
Abstract
Section titled âAbstractâThe principle of superposition is a key ingredient for quantum mechanics. A recent work [Phys. Rev. Lett.116, 110403 (2016)10.1103/PhysRevLett.116.110403] has shown that a quantum adder that deterministically generates a superposition of two unknown states is forbidden. Here we consider the implementation of the probabilistic quantum adder in the 3D cavity-transmon system. Our implementation is based on a three-level superconducting transmon qubit dispersively coupled to two cavities. Numerical simulations show that high-fidelity generation of the superposition of two coherent states is feasible with current circuit QED technology. Our method also works for other physical systems such as two optical cavities coupled to a three-level atom or two nitrogen-vacancy center ensembles interacted with one three-level superconducting flux qubit.