Archaeologically, this period is still blank… There is no special Aryan pottery… no particular Aryan or Indo-Aryan technique is to be identified by the archaeologists even at the close of the second millennium.
Source, in full
About the Aryan invasions. The Culture and Civilization of Ancient India in Historical Outline by D.D. Kosambi, Vikas Publishing House Pvt. Ltd, Delhi-Bombay-Bangalore-Kanpur, 1975 (first printed 1970). Quoted in Talageri, S. (2000). The Rigveda: A historical analysis. New Delhi: Aditya Prakashan.