Ion-Trap Qubits: Sidebands, Shared Modes, and Fluorescence Readout Step by Step
A lightweight execution-visualization book.
Levels and Motion
Qubit Gap Is an Energy Ledger
Motion Uses Packet Indexes
Same Ion Carries State and Motion
Carrier and Sidebands
Carrier Matches the Internal Gap
Red Sideband Removes One Packet
Blue Sideband Adds One Packet
Red Sideband at Ground Motion Rejects
Shared Mode
Two Ions Cite the Same Mode
Red Sideband on One Ion Updates the Shared Mode
Blue Sideband on the Other Ion Updates the Same Mode
Fluorescence Readout and Audit
Bright State Crosses the Count Threshold
Dark State Stays Below Threshold
Ion-Trap Audit Cites Every Source
Drive and Readout Cross-Scans
Sideband Energy Ladder Cross-Scan
Red Boundary Packet Cross-Scan
Blue Growth Packet Cross-Scan
Shared Mode Addressed-Ion Cross-Scan
Fluorescence Threshold Boundary Cross-Scan
Source Calibration and Boundary Scans
Carrier Gap Source Three-Row Scan
Red Spacing Source Three-Row Scan
Packet Energy Source Three-Row Scan
Shared Red Packet Source Three-Row Scan
Fluorescence Threshold Source Three-Row Scan