Nonreciprocity realized with quantum nonlinearity

Understand

Nonreciprocal devices are a key element for signal routing and noise isolation.

• Rapid development of quantum technologies has boosted the demand for a new generation of miniaturized and low-loss nonreciprocal components.
• Here we use a pair of tunable superconducting artificial atoms in a 1D waveguide to experimentally realize a minimal passive nonreciprocal device.
• Taking advantage of the quantum nonlinear behavior of artificial atoms, we achieve nonreciprocal transmission through the waveguide in a wide range of powers.