JPMorgan Chase has overhauled the leadership of its internal research group responsible for quantum computing and other forms of advanced technology, hiring a State Street executive, CNBC has learned.Marco Pistoia, the former IBM inventor who became head of JPMorgan's applied research group in 2020, has recently left the bank, according to a person briefed on the matter, who declined to be identified speaking about personnel.That group conducted research into how emerging technologies including quantum comp ...