Strong parametric dispersive shifts in a statically decoupled multi-qubit cavity QED system
arXiv:2103.09277 · doi:10.1038/s41567-023-02107-2
Abstract
Cavity quantum electrodynamics (QED) with in-situ tunable interactions is important for developing novel systems for quantum simulation and computing. The ability to tune the dispersive shifts of a cavity QED system provides more functionality for performing either quantum measurements or logical manipulations. Here, we couple two transmon qubits to a lumped-element cavity through a shared dc-SQUID. Our design balances the mutual capacitive and inductive circuit components so that both qubits are highly decoupled from the cavity, offering protection from decoherence processes. We show that by parametrically driving the SQUID with an oscillating flux it is possible to independently tune the interactions between either of the qubits and the cavity dynamically. The strength and detuning of this cavity QED interaction can be fully controlled through the choice of the parametric pump frequency and amplitude. As a practical demonstration, we perform pulsed parametric dispersive readout of both qubits while statically decoupled from the cavity. The dispersive frequency shifts of the cavity mode follow the expected magnitude and sign based on simple theory that is supported by a more thorough theoretical investigation. This parametric approach creates a new tunable cavity QED framework for developing quantum information systems with various future applications, such as entanglement and error correction via multi-qubit parity readout, state and entanglement stabilization, and parametric logical gates.
arXiv comment7 pages, 4 figures
References in corpus (45)
- Charge insensitive qubit design derived from the Cooper pair box
- A Quantum Engineer's Guide to Superconducting Qubits
- Qubit architecture with high coherence and fast tunable coupling
- Controlling the spontaneous emission of a superconducting transmon qubit
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- A blueprint for demonstrating quantum supremacy with superconducting qubits
- Qubit-photon interactions in a cavity: Measurement induced dephasing and number splitting
- Deterministic entanglement of superconducting qubits by parity measurement and feedback
- Demonstration of Universal Parametric Entangling Gates on a Multi-Qubit Lattice
- Observation of measurement-induced entanglement and quantum trajectories of remote superconducting qubits
- Implementing a strand of a scalable fault-tolerant quantum computing fabric
- Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit
- 3-Wave Mixing Josephson Dipole Element
- Laser-annealing Josephson junctions for yielding scaled-up superconducting quantum processors
- Dynamic quantum Kerr effect in circuit quantum electrodynamics
- Controlled catch and release of microwave photon states
- Deterministic remote entanglement of superconducting circuits through microwave two-photon transitions
- Tunable Superconducting Qubits with Flux-Independent Coherence
- Microwave-controlled generation of shaped single photons in circuit quantum electrodynamics
- Tunable Coupling Architecture for Fixed-frequency Transmons
- Fault-tolerant detection of a quantum error
- Tunable coupling in circuit quantum electrodynamics with a superconducting V-system
- Parametric coupling for superconducting qubits
- Schrodinger's catapult: Launching multiphoton quantum states from a microwave cavity memory
- Universal stabilization of a parametrically coupled qubit
- Quantum superposition of a single microwave photon in two different "colour" states
- Quantum theory of a bandpass Purcell filter for qubit readout
- Distinguishing coherent and thermal photon noise in a circuit QED system
- Cavity Attenuators for Superconducting Qubits
- Microwave attenuators for use with quantum devices below 100 mK
- Rapid Driven Reset of a Qubit Readout Resonator
- Entanglement Stabilization using Parity Detection and Real-Time Feedback in Superconducting Circuits
- RFSQUID-Mediated Coherent Tunable Coupling Between a Superconducting Phase Qubit and a Lumped Element Resonator
- Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform
- Parametric coupling between macroscopic quantum resonators
- Fast parametric two-qubit gates with suppressed residual interaction using a parity-violated superconducting qubit
- Time-Reversal Symmetrization of Spontaneous Emission for High Fidelity Quantum State Transfer
- Trade off-Free Entanglement Stabilization in a Superconducting Qutrit-Qubit System
- Tunable-Cavity QED with Phase Qubits
- Qubit Parity Measurement by Parametric Driving in Circuit QED
- Quantum interference between two single photons of different microwave frequencies
- High-fidelity dissipative engineering using parametric interactions
- Weakly Flux-Tunable Superconducting Qubit
- Perturbative diagonalization for time-dependent strong interactions
- Fast, tunable, high fidelity cZ-gates between superconducting qubits with parametric microwave control of ZZ-coupling
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- Theory of the Simultaneous Transient Dispersive Readout of Multiple Spin Qubits
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