Lllama and the Lake Monster: SDR in Neutral Atom Quantum Computing
summary
Neutral-atom system uses lasers, magnets and cameras to trap strontium qubits with coherence on the order of tens of seconds; about 50% of sites load randomly and atoms are optically moved to fully fill the array. Control uses a custom RFSoC-based SDR (Hapyxelor) in a MicroTCA chassis producing arbitrary RF from ~50 MHz to 16 GHz (external upconverters above 6 GHz), FPGA/ARM AWGs with eight DAC channels per card, acousto-optic deflectors for per-site addressing, and a USRP N210 with UBX-40 + GNU Radio LLLama system that downmixes 28–100 MHz beat notes to keep lasers locked for weeks.
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chapters (12)
- 0:00Quantum computing and SDR intro
- 1:05What is a quantum computer
- 7:05Why neutral atoms
- 10:33Lasers magnets atomic physics
- 14:27Quantum circuits and control
- 15:54Single-qubit gates with SDR
- 19:54Pixlr SDR architecture
- 23:06Why build our own SDR
- 24:50Pixlr in microTCA scaling
- 25:53Moving atoms with RF pulses
- 26:55Laser locking with frequency comb
- 29:21Summary hiring
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