| Line | Branch | Decision | Exec | Source |
|---|---|---|---|---|
| 1 | // Copyright 2019-2022 Cambridge Quantum Computing | |||
| 2 | // | |||
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |||
| 4 | // you may not use this file except in compliance with the License. | |||
| 5 | // You may obtain a copy of the License at | |||
| 6 | // | |||
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 | |||
| 8 | // | |||
| 9 | // Unless required by applicable law or agreed to in writing, software | |||
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, | |||
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |||
| 12 | // See the License for the specific language governing permissions and | |||
| 13 | // limitations under the License. | |||
| 14 | ||||
| 15 | #pragma once | |||
| 16 | ||||
| 17 | #include <stdexcept> | |||
| 18 | ||||
| 19 | #include "Circuit/Circuit.hpp" | |||
| 20 | #include "Utils/PauliStrings.hpp" | |||
| 21 | ||||
| 22 | namespace tket { | |||
| 23 | ||||
| 24 | class ImplicitPermutationNotAllowed : public std::logic_error { | |||
| 25 | public: | |||
| 26 | 1 | explicit ImplicitPermutationNotAllowed(const std::string& message) | ||
| 27 | 1 | : std::logic_error(message) {} | ||
| 28 | }; | |||
| 29 | ||||
| 30 | /** | |||
| 31 | * Append a Pauli gadget to the end of a given circuit. | |||
| 32 | * Automatically uses Snake CX configuration | |||
| 33 | * | |||
| 34 | * @param circ circuit to append to | |||
| 35 | * @param pauli Pauli operators and their respective qubits | |||
| 36 | * @param angle angle in half-turns | |||
| 37 | * @param cx_config which type of CX configuration to decompose into | |||
| 38 | */ | |||
| 39 | void append_single_pauli_gadget( | |||
| 40 | Circuit& circ, const QubitPauliTensor& pauli, Expr angle, | |||
| 41 | CXConfigType cx_config = CXConfigType::Snake); | |||
| 42 | ||||
| 43 | /** | |||
| 44 | * Append a pair of Pauli gadgets to the end of a given circuit. | |||
| 45 | * (shallow) Uses an adapted arrangement of CX that gives balanced trees | |||
| 46 | * over the matching qubits to improve depth. Better performance | |||
| 47 | * is not guaranteed as CXs may not align for cancellation and | |||
| 48 | * it can be harder to route. | |||
| 49 | * (!shallow) Uses the original method with naive arrangement of CXs. | |||
| 50 | * | |||
| 51 | * @param circ circuit to append to | |||
| 52 | * @param pauli0 first Pauli string | |||
| 53 | * @param angle0 angle for \p pauli0 (half-turns) | |||
| 54 | * @param pauli1 second Pauli string | |||
| 55 | * @param angle1 angle for \p pauli1 (half-turns) | |||
| 56 | * @param cx_config which type of CX configuration to decompose into | |||
| 57 | */ | |||
| 58 | void append_pauli_gadget_pair( | |||
| 59 | Circuit& circ, QubitPauliTensor pauli0, Expr angle0, | |||
| 60 | QubitPauliTensor pauli1, Expr angle1, | |||
| 61 | CXConfigType cx_config = CXConfigType::Snake); | |||
| 62 | ||||
| 63 | } // namespace tket | |||
| 64 |