Activated Tree Tensor Network topology in exatn-gen (a44155f3) · Commits · ORNL Quantum Computing Institute / tnqvm

tnqvm/visitors/exatn-gen/ExatnGenVisitor.cpp

+2 −1

Original line number	Diff line number	Diff line
		@@ -275,7 +275,7 @@ void ExatnGenVisitor<TNQVM_COMPLEX_TYPE>::initialize(
		m_initReconstructionRandom = options.get<bool>("init-random");
		}
		m_previousOptExpansion.reset();
		// Default builder: MPS
		// Tensor network builder
		m_reconstructBuilder = "MPS";
		if (m_layersReconstruct > 0) {
		if (options.keyExists<double>("reconstruct-tolerance")) {
		@@ -722,6 +722,7 @@ void ExatnGenVisitor<TNQVM_COMPLEX_TYPE>::reconstructCircuitTensor(bool forced)
		auto &networkBuildFactory = *(exatn::numerics::NetworkBuildFactory::get());
		auto builder = networkBuildFactory.createNetworkBuilderShared(m_reconstructBuilder);
		builder->setParameter("max_bond_dim", m_maxBondDim);
		if(m_reconstructBuilder == "TTN") builder->setParameter("arity", 2);
		auto approximant = [&]() {
		if (m_initReconstructionRandom \|\| !m_previousOptExpansion) {
		auto approximantTensorNetwork =

tnqvm/visitors/exatn-gen/ExatnGenVisitor.hpp

+11 −11

Original line number	Diff line number	Diff line
		@@ -29,17 +29,17 @@
		* Implementation - Dmitry Lyakh
		*
		**********************************************************************************/
		// +-----------------------------+------------------------------------------------------------------------+-------------+--------------------------+
		// +-----------------------------+------------------------------------------------------------------------+-----------------+--------------------------+
		// \| Initialization Parameter \| Parameter Description \| type \| default \|
		// +=============================+========================================================================+=============+==========================+
		// +=============================+========================================================================+=================+==========================+
		// \| reconstruct-gates \| Perform reconstruction after this number of consecutive 2-q gates \| int \| -1 (no reconstruct) \|
		// +-----------------------------+------------------------------------------------------------------------+-------------+--------------------------+
		// +-----------------------------+------------------------------------------------------------------------+-----------------+--------------------------+
		// \| reconstruct-tolerance \| Reconstruction convergence tolerance \| double \| 1e-4 \|
		// +-----------------------------+------------------------------------------------------------------------+-------------+--------------------------+
		// +-----------------------------+------------------------------------------------------------------------+-----------------+--------------------------+
		// \| max-bond-dim \| Reconstruction max bond dimension (inside approximating tensor network)\| int \| 16 \|
		// +-----------------------------+------------------------------------------------------------------------+-------------+--------------------------+
		// \| reconstruct-builder \| Reconstruction network builder (builds the tensor network ansatz) \| string \| "MPS" \|
		// +-----------------------------+------------------------------------------------------------------------+-------------+--------------------------+
		// +-----------------------------+------------------------------------------------------------------------+-----------------+--------------------------+
		// \| reconstruct-builder \| Reconstruction network builder (builds the tensor network ansatz) \| string: MPS,TTN \| "MPS" \|
		// +-----------------------------+------------------------------------------------------------------------+-----------------+--------------------------+
		#pragma once

		#ifdef TNQVM_HAS_EXATN