By Medha Singh (Reuters) -Shares of U.S. quantum computing companies jumped on Thursday after the Wall Street Journal reported that President Donald Trump's administration is in discussions to acquire equity stakes in exchange for federal funding. Shares of IonQ, Rigetti, D-Wave Quantum and Quantum Computing surged between 7.8% and 16% after the report said the companies are in talks about the U.S. government becoming a shareholder as part of the agreements. A U.S. Department of Commerce official told Reuters in an email that the department is "not currently negotiating with any of the companies". The Defiance Quantum ETF, which tracks companies whose products or services are tied to the development of quantum computing and machine learning technology, added 1.3%, and was set to build on i

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