New Delhi: AI infrastructure startup Simplismart is in talks to raise $40-50 million at a valuation of $300-400 million, potentially more than tripling its valuation in a matter of months, as investors step up bets on a limited pool of artificial intelligence businesses in India, according to people aware of the development.Peak XV Partners and Damac Digital, the data centre arm of Dubai-based real estate group Damac, are in discussions to