Superconductor–semiconductor hybrid-circuit quantum electrodynamics

By G. Burkard, M. Gullans, X. Mi, Jason R. Petta. Nature Reviews Physics, 2019

188 citations recorded by the source corpus.

Light–matter interactions at the single-particle level have generally been explored in the context of atomic, molecular and optical physics. Recent advances motivated by quantum information science have made it possible to explore coherent interactions between photons trapped in superconducting cavities and superconducting qubits. In the context of quantum information, the study of coherent interactions between single charges and spins in semiconductors and photons trapped in superconducting cavities is very relevant, as the spin degree of freedom has a coherence time that can potentially exceed that of superconducting qubits, and cavity photons can serve to effectively overcome the limitation of short-range interaction inherent to spin qubits. Here, we review recent advances in hybrid ‘super–semi’ quantum systems, which coherently couple superconducting cavities to semiconductor quantum dots. We first present an overview of the physics governing the behaviour of superconducting cavities, semiconductor quantum dots and their modes of interaction. We then survey experimental progress in the field, focusing on recent demonstrations of cavity quantum electrodynamics in the strong-coupling regime with a single charge and a single spin. Finally, we broadly discuss promising avenues of future research, including the use of super–semi systems to investigate phenomena in condensed-matter physics. The integration of gate-defined quantum dots with superconducting resonators results in a hybrid architecture that holds promise for quantum information processing. This Review discusses recent experimental results in the field, including the achievement of strong coupling between single microwave photons and the charge and spin degrees of freedom, and examines the underlying physics. Hybrid quantum systems integrate the most desirable properties of semiconductor spin qubits and superconducting quantum devices. Single electron charges can be coherently coupled to single microwave-frequency photons. Using spin–orbit interactions, a single electron spin can be coherently coupled to a single photon. Coherent charge–photon and spin–photon coupling may enable long-range qubit interactions that are mediated by microwave-frequency photons. Hybrid quantum devices are also finding utility as sensitive probes of Kondo and valley physics, and perhaps of Majorana fermions. Hybrid quantum systems integrate the most desirable properties of semiconductor spin qubits and superconducting quantum devices. Single electron charges can be coherently coupled to single microwave-frequency photons. Using spin–orbit interactions, a single electron spin can be coherently coupled to a single photon. Coherent charge–photon and spin–photon coupling may enable long-range qubit interactions that are mediated by microwave-frequency photons. Hybrid quantum devices are also finding utility as sensitive probes of Kondo and valley physics, and perhaps of Majorana fermions.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/67f196547335b904ee5cd1c48ebddced99ad6648

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Cavity magnonics (2021, background): “Circuit QED seeks to couple artificial atoms, such as superconducting qubits (Blais et al., 2020) and semiconductor QDs (Burkard et al., 2020; Lodahl et al., 2015) to MW resonators, that in contrast to natural atoms can be tuned into different coupling regimes (Clarke and Wilhelm, 2008; Devoret and ”
Materials challenges and opportunities for quantum computing hardware (2021, background): “Hybrid quantum systems with superconducting cavities integrated with semiconductor quantum dots ( 157 , 158 ) also show promising results for realizing long-range qubit interactions ( 159 – 161 ), but wefocus on materials issues in spin qubit arrays using nearest-neighbor interactions.”
Circuit quantum electrodynamics (2020, background): “…different physical systems such as NV centers (Kubo et al., 2010), mechanical oscillators (Aspelmeyer et al., 2014), semiconducting quantum dots (Burkard et al., 2020), or collective spin excitations in ferromagnetic crystals (LachanceQuirion et al., 2019) are interfaced with superconducting…”
Fast universal control of an oscillator with weak dispersive coupling to a qubit (2021, background): “Other applications include control in architectures where a large dispersive coupling can be difficult to realize, such as semiconducting qubits coupled to microwave resonators [40] and superconducting qubits coupled to acoustic resonators [27–30], or as a means to selectively control single bosonic”