MOUNTAIN VIEW, Calif. - Quantum computing is such an elusive goal that even the company claiming to have the "world's first commercial quantum computer" acknowledged it isn't entirely sure the machine is performing true quantum calculations. ADVERTISEMENT And independent quantum computing researchers said they are dubious of some of the claims made by D-Wave Systems Inc. because the privately held Canadian company has not yet submitted its findings for peer review, a standard step for gaining acceptance in scientific circles. Many scientists believe that true quantum computing — which is based on the unusual properties of quantum physics — promises...