Multi-mode mediated exchange coupling in cavity QED
arXiv:1011.3732 · doi:10.1103/PhysRevA.83.063827
Abstract
Microwave cavities with high quality factors enable coherent coupling of distant quantum systems. Virtual photons lead to a transverse exchange interaction between qubits, when they are non-resonant with the cavity but resonant with each other. We experimentally probe the inverse scaling of the inter-qubit coupling with the detuning from a cavity mode and its proportionality to the qubit-cavity interaction strength. We demonstrate that the enhanced coupling at higher frequencies is mediated by multiple higher-harmonic cavity modes. Moreover, in the case of resonant qubits, the symmetry properties of the system lead to an allowed two-photon transition to the doubly excited qubit state and the formation of a dark state.
9 pages, 6 figures
References in corpus (17)
- Charge insensitive qubit design derived from the Cooper pair box
- Coupling Superconducting Qubits via a Cavity Bus
- Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
- Quantum information processing with circuit quantum electrodynamics
- Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
- Cavity QED with a Bose-Einstein condensate
- Climbing the Jaynes-Cummings Ladder and Observing its Sqrt(n) Nonlinearity in a Cavity QED System
- Controlling the spontaneous emission of a superconducting transmon qubit
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- Generating Single Microwave Photons in a Circuit
- Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics
- Dressed Collective Qubit States and the Tavis-Cummings Model in Circuit QED
- Fast Reset and Suppressing Spontaneous Emission of a Superconducting Qubit
- State tomography of capacitively shunted phase qubits with high fidelity
- Two-Qubit State Tomography using a Joint Dispersive Read-Out
- Dynamics of dispersive single qubit read-out in circuit quantum electrodynamics
- Multi-photon spectroscopy of a hybrid quantum system