quchip.results.steady_state

Backend-neutral results for stationary Lindblad calculations.

Functions

build_steady_state_result(solver_result, ...)

Wrap one backend stationary solve without concretizing native arrays.

Classes

SteadyStateBatchResult(results, *, shape, axes)	Immutable stationary results reshaped to their declared sweep grid.
SteadyStateResult(state, residual, trace, ...)	One normalized stationary density matrix and its diagnostics.

class quchip.results.steady_state.SteadyStateResult(state, residual, trace, trace_error, hermiticity_error, minimum_eigenvalue, positivity_error, nullity, condition_number, dims, device_info, stats, _backend, _expectations)

Bases: object

One normalized stationary density matrix and its diagnostics.

Parameters:

• state (Any)

• residual (Any)

• trace (Any)

• trace_error (Any)

• hermiticity_error (Any)

• minimum_eigenvalue (Any)

• positivity_error (Any)

• nullity (Any)

• condition_number (Any)

• dims (tuple[int, ...])

• device_info (tuple[tuple[str, bool], ...])

• stats (Mapping[str, Any])

• _backend (Backend)

• _expectations (Mapping[Any, Any])

state: Any

residual: Any

trace: Any

trace_error: Any

hermiticity_error: Any

minimum_eigenvalue: Any

positivity_error: Any

nullity: Any

condition_number: Any

dims: tuple[int, ...]

device_info: tuple[tuple[str, bool], ...]

stats: Mapping[str, Any]

property is_unique: Any

Return uniqueness, or None when the backend skipped that diagnostic.

expect(key, index=None)

Return one named stationary expectation value.

Parameters:

• key (Any)

• index (int | None)

Return type:

Any

reduced_state(device)

Partial-trace the stationary state down to one device.

Parameters:

device (str | BaseDevice)

Return type:

Any

quchip.results.steady_state.build_steady_state_result(solver_result, problem, backend)

Wrap one backend stationary solve without concretizing native arrays.

Parameters:

• solver_result (SteadyStateSolverResult)

• problem (Any)

• backend (Backend)

Return type:

SteadyStateResult

class quchip.results.steady_state.SteadyStateBatchResult(results, *, shape, axes)

Bases: object

Immutable stationary results reshaped to their declared sweep grid.

Parameters:

• results (list[SteadyStateResult])

• shape (tuple[int, ...])

• axes (tuple[tuple[str, Any], ...])

property results: tuple[SteadyStateResult, ...]

Return stationary results in C-order sweep order.

property shape: tuple[int, ...]

Return the natural sweep-grid shape.

property axes: tuple[tuple[str, Any], ...]

Return named sweep-axis metadata.

property backend: Backend

Return the backend shared by every result.

expect(key, index=None)

Return one expectation value reshaped to the sweep grid.

Parameters:

• key (Any)

• index (int | None)

Return type:

Any