Added ability to pass CompositeInstruction kernel to the qsim model (b7f33895) · Commits · ORNL Quantum Computing Institute / qcor

lib/qsim/base/kernel_evaluator.hpp

+12 −1

Original line number	Diff line number	Diff line
		@@ -25,11 +25,17 @@ protected:

		public:
		KernelFunctor(qreg qReg) : q(qReg){};
		// Direct construction via a Composite Instruction
		KernelFunctor(std::shared_ptr<CompositeInstruction> composite) {
		kernel = composite;
		q = qalloc(composite->nPhysicalBits());
		nbParams = composite->nParameters();
		}
		qreg &getQreg() { return q; }
		size_t nParams() const { return nbParams; }
		virtual std::shared_ptr<CompositeInstruction>
		evaluate_kernel(const std::vector<double> &in_params) {
		return nullptr;
		return kernel ? kernel->operator()(in_params) : nullptr;
		}
		};

		@@ -100,4 +106,9 @@ std::shared_ptr<KernelFunctor> createKernelFunctor(
		return std::make_shared<KernelFunctorImpl<Args...>>(
		kernel_ptr, args_translator, helper, q, nParams);
		}

		inline std::shared_ptr<KernelFunctor>
		createKernelFunctor(std::shared_ptr<CompositeInstruction> composite) {
		return std::make_shared<KernelFunctor>(composite);
		}
		} // namespace qcor
		No newline at end of file

+16 −0

Original line number	Diff line number	Diff line
		@@ -140,6 +140,22 @@ public:
		PauliOperator &obs, size_t nbQubits, size_t nbParams) {
		return createModel(quantum_kernel_functor, &obs, nbQubits, nbParams);
		}

		// Passing the state-preparation ansatz as a CompositeInstruction
		static inline QuantumSimulationModel
		createModel(std::shared_ptr<CompositeInstruction> composite,
		Observable *obs) {
		QuantumSimulationModel model;
		model.observable = obs;
		model.user_defined_ansatz = createKernelFunctor(composite);
		return model;
		}

		static inline QuantumSimulationModel
		createModel(std::shared_ptr<CompositeInstruction> composite,
		PauliOperator &obs) {
		return createModel(composite, &obs);
		}
		};

		// Quantum Simulation Workflow (Protocol)