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PhysicalLayoutGraph

cqlib_core::compile::physical_target

Struct PhysicalLayoutGraph 

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pub struct PhysicalLayoutGraph { /* private fields */ }
Expand description

Compiler-local physical graph with usable qubits, distances, and calibration data.

The graph intentionally separates undirected routing connectivity from directed coupling support. Use Self::distance or Self::is_adjacent_undirected for routing reachability, and Self::supports_directed_coupling when a target-specific direction matters.

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impl PhysicalLayoutGraph

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pub fn from_device(device: &Device) -> Result<Self, CompilerError>

Builds a layout physical graph from a device, excluding unusable qubits.

The resulting graph includes all usable qubits even when the topology is disconnected. Disconnected pairs have no finite distance and are rejected later by layout or routing checks when an interaction needs them.

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pub fn physical_qubits(&self) -> &[PhysicalQubit]

Returns usable physical qubits in deterministic order.

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pub fn distances(&self) -> &DistanceTable

Returns all-pairs undirected shortest-path distances over usable qubits.

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pub fn distance(&self, a: PhysicalQubit, b: PhysicalQubit) -> Option<u32>

Returns the undirected shortest-path distance between two usable qubits.

Returns None when either qubit is unusable or when the two usable qubits are disconnected.

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pub fn is_adjacent_undirected(&self, a: PhysicalQubit, b: PhysicalQubit) -> bool

Returns whether two usable physical qubits are adjacent in either direction.

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pub fn readout_error(&self, qubit: PhysicalQubit) -> Option<f64>

Returns the readout error for a physical qubit, if known.

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pub fn supports_two_qubit_gate_directed( &self, control: PhysicalQubit, target: PhysicalQubit, gate: StandardGate, ) -> bool

Returns whether gate is a native capability on the directed edge.

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pub fn two_qubit_gate_error_directed( &self, control: PhysicalQubit, target: PhysicalQubit, gate: StandardGate, ) -> Option<f64>

Returns the calibrated error for gate on the directed edge.

None means either that the gate is unsupported or that it is supported without a known calibration. Use Self::supports_two_qubit_gate_directed to distinguish those states.

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pub fn supports_directed_coupling( &self, control: PhysicalQubit, target: PhysicalQubit, ) -> bool

Returns whether there is a directed coupling from control to target.

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pub fn has_fidelity_data(&self) -> bool

Returns whether any readout or two-qubit calibration data is available.

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pub fn has_readout_error_data(&self) -> bool

Returns whether readout-error data is available.

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pub fn has_two_qubit_error_data(&self) -> bool

Returns whether two-qubit error data is available.

Trait Implementations§

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impl Clone for PhysicalLayoutGraph

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for PhysicalLayoutGraph

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for PhysicalLayoutGraph

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fn eq(&self, other: &Self) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for PhysicalLayoutGraph

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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