MTT-S Dallas: Challenges and Opportunities for Development of Ultra-Low Power Scaled Quantum Computing Systems
Speaker: Sudipto Chakraborty, Omni Design Technologies, Dallas, TX
Topic: Challenges and Opportunities for Development of Ultra-Low Power Scaled Quantum Computing Systems
Abstract:
This talk will cover practical challenges for the development of integrated system designs for next generation quantum computing which includes a combination of integrated circuits, systems and microwave engineering. Starting from system level, it will detail the design considerations for non-multiplexed, semi-autonomous, transmon qubit state controllers (QSC) implemented in 14 nm CMOS FinFET technology. The QSC includes an augmented general-purpose digital processor that supports waveform generation and phase rotation operations combined with a low power current-mode single sideband upconversion I/Q mixer-based RF arbitrary waveform generator (AWG). Implemented in 14nm CMOS FinFET technology, the QSC generates control signals in its target 4.5 GHz to 5.5 GHz frequency range, achieving an SFDR > 50 dB for a signal bandwidth of 500 MHz. With the controller operating in the 4K stage of a cryostat and connected to a transmon qubit in the cryostat’s millikelvin stage, measured transmon T1 and T2 coherence times were 75.5 μS and 73 μS, respectively, in each case comparable to results achieved using conventional room temperature controls. In further tests with transmons, a qubit-limited error rate of 7.76x10-4 per Clifford gate is achieved, again comparable to results achieved using room temperature controls. The QSC’s maximum RF output power is -18 dBm, and power dissipation per qubit under active control is 23 mW. An improved, low-power design version that achieves half of this power will also be presented, including some clocking solutions for large arrays.
Bio:
Sudipto Chakraborty (B. Tech, IIT, Kharagpur, 1998, Ph.D from GaTech, 2002) was with Texas Instruments till 2016 where he designed low power IC for >10 product families in automotive/wireless/medical/microcontrollers. Between 2017-2025 he led the low power circuit design for next generation quantum computing applications in IBM research using nanometer CMOS. From 2026, he has been the director of RF engineering at Omni Design  Technologies, a leading IP startup working in the area of wideband and broadband communications using CMOS FinFET technologies at 3nm and beyond. He has authored or co-authored >90 papers, two books and 99 US patents. He has served in the TPC including ISSCC, CICC, RFIC, IMS, and is an IBM master inventor. He serves as an associate editor of TCAS-I, TCAS-II, CASS magazine and distinguished lecturer in the IEEE MTT-S, CASS and SSCS. He is an IEEE fellow.
Date & Time: September 23, 2026, 12:00pm-1:15pm CST
Cost: Free
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- Starts 15 September 2026 02:00 AM UTC
- Ends 23 September 2026 05:00 PM UTC
- No Admission Charge