Researchers Demonstrate Stable Microwave-Optical Transduction Using Thin-Film Lithium Tantalate
Scientists have successfully created the first integrated electro-optic microwave-optical transducers using thin-film lithium tantalate (TFLT), a material that offers improved stability and efficiency compared to existing alternatives. The devices achieved bidirectional conversion between optical and microwave photons with stable operation over multiple days and minimal feedback requirements. This advancement could enable more practical and scalable quantum computing networks and distributed quantum processors.
Researchers reported the development of electro-optic transducers based on thin-film lithium tantalate that convert between microwave and optical photons—a critical capability for connecting superconducting quantum computers and building quantum networks. The team fabricated multiple devices using wafer-scale deep ultraviolet lithography, demonstrating coherent bidirectional conversion at 4.9-5.5 GHz microwave frequencies with measured efficiencies consistent with theoretical predictions. A key advantage of TFLT over the previously-used thin-film lithium niobate is improved bias stability and high-power handling, allowing continuous operation over multiple days with only a static bias field and minimal active feedback. The researchers characterized optical losses, microwave resonator performance, and added noise, finding less than one added photon per 100-microsecond pulse at peak efficiencies. These results establish TFLT as a scalable platform suitable for future quantum interconnects and modular quantum processors.
What's missing
The study does not discuss potential limitations in scaling to larger quantum networks, comparison of cost or fabrication difficulty relative to competing platforms, or timeline for practical integration into operational quantum computing systems.
What different sources said
- arXiv physicsCenter
Stable, bidirectional electro-optic transduction in thin film lithium tantalate
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