Automated Synthesis of Encoder Circuits for Stabilizer Codes #275
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burgholzer
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #275 +/- ##
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- Coverage 83.6% 83.1% -0.5%
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Files 49 51 +2
Lines 4162 4343 +181
Branches 372 372
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+ Hits 3481 3611 +130
- Misses 681 732 +51
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| # def gate_optimal_encoding_circuit(code: CSSCode) -> QuantumCircuit: | ||
| # """Synthesize an encoding circuit for the given CSS code using the minimal number of gates. | ||
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| # Args: | ||
| # code: The CSS code to synthesize the encoding circuit for. | ||
| # optimize_depth: Whether to optimize the depth of the circuit. | ||
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| # Returns: | ||
| # The synthesized encoding circuit and the qubits that are used to encode the logical qubits. | ||
| # """ | ||
| # logging.info("Starting optimal encoding circuit synthesis.") | ||
| # checks, logicals, _ = _get_matrix_with_fewest_checks(code) | ||
| # checks, cnots = heuristic_gaussian_elimination(np.vstack((checks, logicals)), parallel_elimination=optimize_depth) | ||
| # cnots = cnots[::-1] |
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These will be needed later for the encoder synthesis.
Encoding wasn't optimal before. Consider the logicals as a group.
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Also added example circuits for the five qubit code and the 8,3,3 Gottesman code. Also moved Notebooks to example folder.
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Description
This PR introduces functionality to automatically synthesize encoder circuits for arbitrary stabilizer codes. Since this is closely related to state preparation circuit synthesis, this PR refactors and unifies the respective synthesis methods into a
circuit_synthesismodule.Planned Features:
Optimal (gate or depth) circuit synthesis for non-CSS ancilla statesHeuristic circuit synthesis for non-CSS ancilla statesThe last parts were canceled because qecc functionality already allows for the construction of such state preparation circuits.
Checklist: