High-Energy Radiation Drain (HERD) filtering technique invented at Chalmers University sets a new standard in infra-red (IR) block filtering by providing ultra low in-band losses while preserving IR absorption of traditional IR-blocking filters.
How others use HERDQuery HERD
Quantum computing systems require ultra-low noise environments to maintain qubit coherence. Traditional IR-blocking filters often introduce excessive insertion loss, degrading signal-to-noise ratio (SNR).
HERD overcomes these limitations by combining high-energy radiation absorption with exceptionally low in-band losses. This ensures optimized signal transmission while preventing high frequency radiation from disrupting qubit operations.
Quantum computing systems require ultra-low noise environments to maintain qubit coherence. Traditional IR-blocking filters often introduce excessive insertion loss, degrading signal-to-noise ratio (SNR).
HERD overcomes these limitations by combining high-energy radiation absorption with exceptionally low in-band losses. This ensures optimized signal transmission while preventing high frequency radiation from disrupting qubit operations.
Demonstrations of HERD in Action
In a recent paper from the lab of Michel H. Devoret at Yale University, the research team achieved state-of-the-art qubit readout, reaching 99.93% quantum non-demolition (QND) fidelity with only 0.02% leakage to non-computational states.
With a charge sensitive transmon qubit directly coupled to a waveguide, the team at the 202Q-lab of Simone Gasparinetti managed to directly observe quasiparticle tunneling by simply probing with continues microwave tones. They observe stable quasiparticle rates between 2-4 Hz with a temporal resolution of 10 us, without a quantum limited amplifier.
Our HERD technology ensures industry-leading in-band performance with a highly attenuating stopband. With a typical insertion loss of 0.2 dB below 8 GHz and more than 65 dB of attenuation above 70 GHz, HERD-2 our highest performing filter to date.
The filter consists of a gold-plated copper body with an integrated non-magnetic absorber. HERD-2 is suitable for all cryogenic applications using superconducting circuits, including superconducting and spin qubits.
For those interested in the scientific foundations of our technology, we invite you to explore our research on High-Energy Radiation Drain filtering. Please find the link to our paper below for an in-depth understanding of our work.
