title: Proposal for High-Fidelity Quantum Simulation Using a Hybrid Dressed State.
abstract: A fundamental goal of quantum technologies concerns the exploitation of quantum coherent dynamics for the realization of novel quantum applications such as quantum computing, quantum simulation, and quantum metrology. A key challenge on the way towards these goals remains the protection of quantum coherent dynamics from environmental noise. Here, we propose a concept of a hybrid dressed state from a pair of continuously driven systems. It allows sufficiently strong driving fields to suppress the effect of environmental noise while at the same time being insusceptible to both the amplitude and phase noise in the continuous driving fields. This combination of robust features significantly enhances coherence times under realistic conditions and at the same time provides new flexibility in Hamiltonian engineering that otherwise is not achievable. We demonstrate theoretically applications of our scheme for a noise-resistant analog quantum simulation in the well-studied physical systems of nitrogen-vacancy centers in diamond and of trapped ions. The scheme may also be exploited for quantum computation and quantum metrology.
authors.affiliation: School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.|Institut für Theoretische Physik, Albert-Einstein Allee 11, Universität Ulm, 89069 Ulm, Germany.|Center for Integrated Quantum Science and Technology, Universität Ulm, 89069 Ulm, Germany.
authors.forename: Jianming
authors.initials: J
authors.lastname: Cai
authors.affiliation: Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Givat Ram, Israel.
authors.forename: Itsik
authors.initials: I
authors.lastname: Cohen
authors.affiliation: Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Givat Ram, Israel.
authors.forename: Alex
authors.initials: A
authors.lastname: Retzker
authors.affiliation: Institut für Theoretische Physik, Albert-Einstein Allee 11, Universität Ulm, 89069 Ulm, Germany.|Center for Integrated Quantum Science and Technology, Universität Ulm, 89069 Ulm, Germany.
authors.forename: Martin B
authors.initials: MB
authors.lastname: Plenio