Protected quantum computation with multiple resonators in ultrastrong coupling circuit QED |
| |
Authors: | Nataf Pierre Ciuti Cristiano |
| |
Institution: | Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot-Paris 7 et CNRS, Batiment Condorcet, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France. |
| |
Abstract: | We investigate theoretically the dynamical behavior of a qubit obtained with the two ground eigenstates of an ultrastrong coupling circuit-QED system consisting of a finite number of Josephson fluxonium atoms inductively coupled to a transmission line resonator. We show a universal set of quantum gates by using multiple transmission line resonators (each resonator represents a single qubit). We discuss the intrinsic "anisotropic" nature of noise sources for fluxonium artificial atoms. Through a master equation treatment with colored noise and many-level dynamics, we prove that, for a general class of anisotropic noise sources, the coherence time of the qubit and the fidelity of the quantum operations can be dramatically improved in an optimal regime of ultrastrong coupling, where the ground state is an entangled photonic "cat" state. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|