Controlling the energy gap of a tunable two-level system by ac drive
arXiv:1811.12703 · doi:10.1103/PhysRevB.101.054511
Abstract
We study the influence of a strong off-resonant driving signal to the energy levels of a superconducting flux qubit both experimentally and theoretically. In the experiment, we carry out a three-tone spectroscopy. This allows us to directly observe the modification of the qubit's energy levels by the dynamical Stark shift caused by the driving signal. A theoretical treatment including corrections from both, rotating and counter-rotating frame, allowed us to completely explain the observed experimental results and to reconstruct the influence of the strong driving to the dissipative dynamics as well as to the coupling constants of the qubit. As one potential application, the tunability of the minimal energy-level splitting of a superconducting qubit by a microwave induced dynamical Stark shift can help to overcome the parameter spread induced by the micro fabrication of superconducting artificial quantum circuits.
arXiv comment23 pages, 4 figures
References in corpus (33)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
- Coherent control of macroscopic quantum states in a single-Cooper-pair box
- Quantum information processing with superconducting circuits: a review
- Decoherence in Josephson Qubits from Dielectric Loss
- Scalable Quantum Simulation of Molecular Energies
- Observation of the Bloch-Siegert Shift in a Qubit-Oscillator System in the Ultrastrong Coupling Regime
- Resonance Fluorescence of a Single Artificial Atom
- Decoherence in a superconducting quantum bit circuit
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- Qubit-photon interactions in a cavity: Measurement induced dephasing and number splitting
- Decoherence of flux qubits due to 1/f flux noise
- Implementation of a Toffoli Gate with Superconducting Circuits
- Dynamical polarizability of atoms in arbitrary light fields: general theory and application to cesium
- Implementation of a Quantum Metamaterial
- Sisyphus cooling and amplification by a superconducting qubit
- Stark effect and generalized Bloch-Siegert shift in a strongly driven two-level system
- AC Stark shift of the Cs microwave atomic clock transitions
- Dressed Relaxation and Dephasing in a Strongly Driven Two-Level system
- Low-frequency characterization of quantum tunneling in flux qubits
- Dressed-state amplification by a superconducting qubit
- Floquet spectroscopy of a strongly driven quantum dot charge qubit with a microwave resonator
- Transformed Dissipation in Superconducting Quantum Circuits
- Dissipation in circuit quantum electrodynamics: lasing and cooling of a low-frequency oscillator
- Weak continuous monitoring of a flux qubit using coplanar waveguide resonator
- Radio-Frequency Method for Investigation of Quantum Properties of Superconducting Structures
- Reading-out the state inductively and microwave spectroscopy of an interferometer-type charge qubit
- Amplification and attenuation of a probe signal by doubly-dressed states
- Local Sensing with the Multi-Level AC Stark Effect
- Landau-Zener-Stückelberg-Majorana lasing in circuit QED
- Performance analysis of an optically pumped magnetometer in Earth's magnetic field
- Tuned transition from quantum to classical for macroscopic quantum states
- Two-photon lasing by a superconducting qubit