Perfect bosonic quantum state transfer using imperfect transducers and interference*

The ability to faithfully transfer quantum states between disparate quantum systems is a crucial functionality for quantum information processing. Quantum transducers are often limited by a weak overall coupling strength, or by unwanted spurious interactions. I will discuss recent theoretical work showing that such imperfect transducers can nonetheless be used to accomplish perfect transduction by harnessing interference effects. Unlike other recent approaches for mitigating transduction errors, our approach does not require the ability to inject squeezing at both source and receiver systems, and is applicable to a wide class of imperfect transducers. Our work has direct relevance to optomechanical microwave-to-optics transduction, and also to hybrid quantum memory schemes.