Wideband Josephson Parametric Isolator
arXiv:2212.08563 · doi:10.1103/PhysRevApplied.20.034054
Abstract
The cryogenic hardware required to build a superconducting qubit based quantum computer demands a variety of microwave components. These elements include microwave couplers, filters, amplifiers, and circulators/isolators. Traditionally implemented as discrete components, integration of this peripheral hardware, in an effort to reduce overall footprint, thermal load, and added noise, is a key challenge to scaling modern quantum processors with qubit counts climbing over the 100+ mark. Ferrite--based microwave isolators, generally employed in the readout chain to decouple qubits and resonators from readout electronics, persist as one of the volumetrically largest devices still utilized as discrete components. Here we present an alternative two--port isolating integrated circuit derived from the DC Superconducting Quantum Interference Device (DC-SQUID). Non-reciprocal transmission is achieved using the three-wave microwave mixing properties of a flux-modulated DC--SQUID. We show that when multiple DC-SQUIDs are embedded in a multi--pole admittance inverting filter structure, the three-wave mixing derived from the flux pumping of the DC-SQUIDs can provide directional microwave power flow. For a three--pole filter device, we experimentally demonstrate a directionality greater than 15 dB over a 600 MHz bandwidth.
arXiv comment16 pages, 10 figures
References in corpus (20)
- Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
- A blueprint for demonstrating quantum supremacy with superconducting qubits
- Realizing Rapid, High-Fidelity, Single-Shot Dispersive Readout of Superconducting Qubits
- Dispersive regime of circuit QED: photon-dependent qubit dephasing and relaxation rates
- The reconfigurable Josephson circulator/directional amplifier
- Nonreciprocal microwave signal processing with a Field-Programmable Josephson Amplifier
- Widely tunable on-chip microwave circulator for superconducting quantum circuits
- Graph-based analysis of nonreciprocity in coupled-mode systems
- Multiplexed dispersive readout of superconducting phase qubits
- Coupling Matrix Representation of Nonreciprocal Filters Based on Time Modulated Resonators
- General method for extracting the quantum efficiency of dispersive qubit readout in circuit QED
- On-Chip Josephson Junction Microwave Switch
- Synthesis of parametrically-coupled networks
- Active protection of a superconducting qubit with an interferometric Josephson isolator
- Josephson junction microwave modulators for qubit control
- Efficient and Low-Backaction Quantum Measurement Using a Chip-Scale Detector
- Negative-resistance models for parametrically flux-pumped superconducting quantum interference devices
- Multiparametric Amplification and Qubit Measurement with a Kerr-free Josephson Ring Modulator
- High-fidelity qubit readout using interferometric directional Josephson devices
- Magnetic-free traveling-wave nonreciprocal superconducting microwave components