QunaSys Tech BlogQuantum-Selected Configuration Interaction: Classical Diagonalization of Hamiltonians in Subspaces…Introduction4 min read·Feb 9, 2024----

QunaSys Tech BlogAnalytical gradient of energies with a sophisticated calculation method by quantum computers…Researchers at QunaSys Inc., Osaka University, and Mitsubishi Chemical Co. have developed an algorithm for calculating the gradient of…5 min read·Feb 18, 2022--1--1

QunaSys Tech BlogAccelerating variational quantum algorithmsA novel way to estimate expectation values on quantum computers6 min read·Jan 13, 2022----

QunaSys Tech BlogComputing the Green's function on near-term quantum computersMethods to calculate an indispensable tool in quantum physics6 min read·Mar 22, 2021----

QunaSys Tech BlogQuantum machine learning of quantum data with NISQ devicesLearning wavefunctions of molecules in quantum chemistry8 min read·Feb 15, 2021----

QunaSys Tech BlogCalculating derivatives of molecular electronic energy on a quantum computerWhile classical computers have bits representing either 0 or 1 values, quantum computers have qubits which provide arbitrary superposition…5 min read·Nov 30, 2020----

QunaSys Tech BlogComprehensive approach for resolving energy spectrum with symmetry using a quantum computer“Symmetry” appears everywhere in modern physics, and it plays a significant role in understanding various properties of a quantum system…7 min read·Nov 16, 2020----

QunaSys Tech BlogTesting important industrial problems with Honeywell’s Ion-Trap quantum computerCalculating transition amplitudes of Azobenzene isomers using Honeywell System Model HØ5 min read·Nov 2, 2020----

QunaSys Tech BlogQuantum algorithm for calculating electronically excited states of moleculesSubspace-Search Variational Quantum Eigensolver6 min read·Oct 19, 2020----

QunaSys Tech BlogAccelerate quantum computation from a classical approachA simple, efficient, and robust optimizer for NISQ devices5 min read·Oct 1, 2020--2--2