On-chip microwave coherent source with in-situ control of the photon number distribution

Abstract

Coherent photon sources are key elements in different applications, ranging from quantum sensing to quantum computing. The possibility of designing and engineering superconducting circuits behaving like artificial atoms supports the realization of quantum optics protocols, including microwave photons generation. Here we propose and theoretically investigate a design that allows a tunable photon injection directly on-chip. Our approach enables control of the emission via an external knob while preserving, in principle, the stability and linewidth characteristics. This is achieved by replacing the conventional capacitive link between the source and the reservoir with a tunable coupler, with the advantage of avoiding direct dynamical manipulation of the photon source dynamics, providing pulsed control of the emission. We validate the dynamical control of the generated state under the effect of an external flux threading the tunable coupler and discuss the possibility of employing this scheme also in the context of multiple bosonic reservoirs.

18 pages, 7 figures

References in corpus (17)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Charge insensitive qubit design derived from the Cooper pair box
• Microwave photonics with superconducting quantum circuits
• Controlling the spontaneous emission of a superconducting transmon qubit
• Generating Single Microwave Photons in a Circuit
• Real-time quantum error correction beyond break-even
• Observation of Resonant Photon Blockade at Microwave Frequencies using Correlation Function Measurements
• Decoherence of flux qubits due to 1/f flux noise
• Single artificial-atom lasing
• Microwaves in Quantum Computing
• Demonstration of an ac Josephson junction laser
• Electromagnetically-induced transparency with amplification in superconducting circuits
• Practical quantum computing on encrypted data
• Single-artificial-atom lasing using a voltage-biased superconducting charge qubit
• Dressed-state amplification by a superconducting qubit
• Tunable coupler to fully decouple and maximally localize superconducting qubits
• Discriminating the Phase of a Coherent Tone with a Flux-Switchable Superconducting Circuit