Description:

Traditionally, the control and measurement of superconducting quantum devices including arrays of qubits are done using room-temperature classical electronics connected to cryogenic environment via high fidelity cables. This poses daunting technical challenges to quantum system scaling as the heat load, latency, crosstalk, noise associated with bringing signals in and out of the cryostat rises dramatically with number of quantum devices. By integrating the control and readout electronics into the cryostat in proximity to quantum devices, these problems can be drastically reduced to enable large-scale quantum arrays.  Superconducting Single Flux Quantum (SFQ) digital circuits are being developed for proximal classical processors for low-overhead qubit control and measurement. SFQ digital circuits also can perform in situ classical processing of the results of quantum measurement to enable fast error tracking and feedback to stabilize the quantum array. Furthermore, hybrid quantum-classical systems integrating together the quantum and classical processing hardware units can match to various application algorithm architectures which typically combine quantum and classical algorithmic modules.  Superconducting SFQ circuits are being fabricated at SEEQC Foundry – a commercial chip foundry serving a wide variety of customers from academia, industry and government.

Dr. Oleg Mukhanov, CTO and co-founder of SeeQC, Inc.

Host: John Ketterson