Challenges and Opportunities for Development of Ultra-Low Power Scaled Quantum Computing Systems
This talk will cover practical challenges for the development of integrated system designs for next-generation quantum computing, combining integrated circuits, systems, and microwave engineering. Starting from the system level, it will detail design considerations for non-multiplexed, semi-autonomous transmon qubit state controllers implemented in 14 nm CMOS FinFET technology. The controller includes an augmented general-purpose digital processor supporting waveform generation and phase rotation, combined with a low-power current-mode single-sideband conversion I/Q mixer-based RF arbitrary waveform generator. The QSC generates control signals in the 4.5 to 5.5 GHz range with SFDR greater than 50 dB for 500 MHz bandwidth. With the controller operating at the 4 K stage of a cryostat and connected to a transmon qubit in the millikelvin stage, measured T1 and T2 coherence times were 75.5 us and 73 us, respectively. Further tests achieved a qubit-limited error rate of 7.76 x 10^-4 per Clifford gate, comparable to conventional room-temperature controls. The talk will also present an improved low-power design version and clocking solutions for large arrays.
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- Univerisity of Waterloo
- Waterloo, Ontario
- Canada N2L 3G1
- Building: DWE
- Room Number: 2529
- Click here for Map
- Starts 09 September 2026 04:00 AM UTC
- Ends 14 September 2026 04:30 PM UTC
- No Admission Charge
Speakers
Dr. Sudipto Chakraborty of Omni Design Technologies
Biography:
Sudipto Chakraborty received the B.Tech. degree from IIT Kharagpur in 1998 and the Ph.D. degree from Georgia Tech in 2002. He was with Texas Instruments until 2016, where he designed low-power ICs for more than 10 product families in automotive, wireless, medical, and microcontroller applications. From 2017 to 2025, he led low-power circuit design for next-generation quantum-computing applications at IBM Research using nanometer CMOS. Since 2026, he has served as Director of RF Engineering at Omni Design Technologies, a leading IP
startup working on wideband and broadband communications using CMOS FinFET technologies at 3 nm and beyond. He has authored or co-authored more than 90 papers, two books, and 99 US patents. He is an IBM Master Inventor, an IEEE Fellow, and a Distinguished Lecturer in IEEE MTT-S, CASS, and SSCS.
