Carrier drives change internal state without changing packet index. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

The sideband cites the trap gap and packet spacing

The trap source has gap 8 joules and spacing 2 joules.

ΔE=8 J,hνm=2 J\Delta E=8\ \text{J},\quad h\nu_m=2\ \text{J}
Carrier drive sourceThe drive will cite this trap source.lowerEnergy=0 JupperEnergy=8 JqubitGap=8 JpacketIndex=2 packetmodeSpacing=2 JmotionalEnergy=4 JreadoutBit=1 bit

Carrier drive matches the internal gap and leaves motion unchanged

The drive energy is 8 joules, taking packet 2 to packet 2.

8 J,228\ \text{J},\quad 2\to 2
Carrier driveThe drive energy and packet update are checked together.driveEnergy=8 JstartPacket=2 packetendPacket=2 packetmatchedBit=1 bitacceptedBit=1 bit