Grant: Alliance Grants

There is a current push to exploit the properties of quantum mechanics for real-world applications. Examples include quantum computation and sensing, where microwave superconducting circuits are outperforming the bounds set by classical physics. However, these systems must be cooled to 1/100th of a degree above absolute zero, confining them to large, expensive dilution refrigerators. This requirement is particularly restrictive for quantum sensors, as it severely limits the environments into which they can be deployed. Alternatively, by operating in the higher frequency mm-wave regime (30-300 GHz), quantum circuits can maintain their coherence to temperatures up to 4 K, allowing for cheaper, compact refrigeration solutions. Unfortunately, there has been little research studying mm-wave superconducting systems and commercial cryogenic infrastructure above 40 GHz is nonexistent. We propose to address this gap by developing mm-wave measurement technology that operates at frequencies as high as 110 GHz and temperatures ranging from 10 mK to 4 K. Complete with kinetic-inductance-based parametric amplifiers, we will realize high-efficiency readout of mm-wave quantum signals, as well as entangled photon generation. Applying this technology to optomechanics and quantum illumination, we will open the door to quantum sensing at previously unattainable temperatures and frequencies, significantly broadening their applicability. This work will be performed in partnership with Canadian startups Zero Point Cryogenics and Qubic, as well as government end user Defence Research and Development Canada, all of whom will participate in product development and commercialization. Not only will this produce invaluable IP, establishing a Canadian foothold in the exciting field of quantum sensing, it will provide a collaborative environment to train and inspire the next generation of scientists and engineers for Canada's rapidly growing quantum industry.