Grunnleggende konsepter
Memristor-based DC sources offer a promising approach for scalable in-situ biasing of quantum dot arrays at cryogenic temperatures.
Sammendrag
This paper investigates the feasibility of using memristor-based DC sources for biasing quantum dot arrays at cryogenic temperatures. The key highlights are:
The authors demonstrate the cryogenic operation of a commercial operational amplifier (AD8605) down to 1.2 K, which is a critical component for the memristor-based DC source prototype.
The memristor-based DC source prototype is characterized at both room temperature and 1.2 K. At room temperature, the prototype exhibits a tunable output voltage range of 0.4 V to 0.65 V with a 10 mV resolution. At 1.2 K, the prototype can sweep a 0.4 V to 0.65 V range, but with a lower voltage resolution due to the higher resistance of the memristors at cryogenic temperatures.
The stability of the programmed output voltages is evaluated, showing a drift of only 1 μV/s at 1.2 K, which is compatible with the coherence time of spin qubits.
To address the power consumption and voltage resolution limitations of the discrete prototype, the authors propose a fully integrated CMOS-memristor approach. Simulations suggest this integrated design can reduce the power consumption to 10 μW per DC source and enable the integration of up to 300,000 DC sources at the 4.2 K stage of a dilution fridge, paving the way for large-scale quantum computing applications.
Statistikk
The memristor-based DC source prototype exhibits a voltage drift of approximately 1 μV/s at 1.2 K.
The power consumption of the AD8605 operational amplifier is around 10 mW at 1.2 K.
Sitater
"Memristor-based DC sources offer a promising avenue for in situ biasing of quantum dot arrays."
"Simulations reveal a reduction in power consumption, down to 10 μW per DC source and in footprint. This allows for the integration of up to one million eNVM-based DC sources at the 4.2 K stage of a dilution fridge, paving the way for near term large-scale quantum computing applications."