Table 2 Qubit control protocols on the pipeline

From: Pipeline quantum processor architecture for silicon spin qubits

Operation

Symbol

Time

Method

Shuttling

τs

10 ns

Global bucket-brigade pulses

Single-qubit Z-rotations

τ1Q

1 μs (0.1 μs)

Local g-factor Stark shifts

Single-qubit X-rotations

τ1X

3τ1Q + 8τs = 3.06 μs (0.36 μs)

Global B1-drive frequency bins

Two-qubit native gates

τ2Q

1 μs (0.1 μs)

Native exchange interaction

Two-qubit phase gates

τ2P

τ2Q + τ1Q + 3τs = 2.0 μs (0.23 μs)

Composite from native gates and Z-rotations

Two-qubit SWAP-rotations

τ2S

3τ2Q + 2τ1Q + 12τs = 5.1 μs (0.62 μs)

Composite from native gates and Z-rotations

  1. Summary of the protocols introduced in “Implementation with silicon quantum dots”. We have marked the gate times assuming τ1Q = τ2Q = 0.1 μs in parenthesis. Numbers that are not in parentheses assume τ1Q = τ2Q = 1 μs. Faster gate times require higher attainable g-factor tuning to prevent gate time errors from dominating the infidelities.
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