A V-shape superconducting artificial atom based on two inductively coupled transmons

Abstract

Circuit quantum electrodynamics systems are typically built from resonators and two-level artificial atoms, but the use of multi-level artificial atoms instead can enable promising applications in quantum technology. Here we present an implementation of a Josephson junction circuit dedicated to operate as a V-shape artificial atom. Based on a concept of two internal degrees of freedom, the device consists of two transmon qubits coupled by an inductance. The Josephson nonlinearity introduces a strong diagonal coupling between the two degrees of freedom that finds applications in quantum non-demolition readout schemes, and in the realization of microwave cross-Kerr media based on superconducting circuits.

5 pages, 3 figures

References in corpus (6)

• Measurement of Autler-Townes and Mollow transitions in a strongly driven superconducting qubit
• Tunable coupling in circuit quantum electrodynamics with a superconducting V-system
• Microwave-Induced Cooling of a Superconducting Qubit
• A superconducting qubit with Purcell protection and tunable coupling
• Giant Kerr nonlinearities in Circuit-QED
• Rabi-like oscillations of an anharmonic oscillator: classical versus quantum interpretation

Cited by in corpus (16)

• To catch and reverse a quantum jump mid-flight
• Fast high fidelity quantum non-demolition qubit readout via a non-perturbative cross-Kerr coupling
• Topologically Protected Quantum Coherence in a Superatom
• Floquet quantum simulation with superconducting qubits
• Implementation of pairwise longitudinal coupling in a three-qubit superconducting circuit
• Full two-photon downconversion of just a single photon
• Mixing of coherent waves on a single three-level artificial atom
• Simultaneously exciting two atoms with photon-mediated Raman interaction
• Multi-mode superconducting circuits for realizing strongly coupled multi-qubit processor units
• Electron shelving of a superconducting artificial atom
• One- and two-photon scattering from generalized V-type atoms
• Three-qubit direct dispersive parity measurement with Tunable Coupling Qubits
• Transmon-qubit readout using in-situ bifurcation amplification in the mesoscopic regime
• Characterisation of spatial charge sensitivity in a multi-mode superconducting qubit
• Unexpectedly allowed transition in two inductively coupled transmons
• Robust shaped pulses for arrays of superconducting or semiconductor spin qubits with fixed Ising coupling