Roadmap on emerging hardware and technology for machine learning by Xia, Q, Berggren, KK, Likharev, K, Strukov, DB, Jiang, H, Mikolajick, T, Querlioz, D, Salinga, M, Erickson, J, Pi, S, Xiong, F, Lin, P, Li, C, Xiong, S, Hoskins, B, Daniels, M, Madhavan, A, Liddle, J, McClelland, J, Yang, Y, Rupp, J, Nonnenmann, S, Gong, N, Cheng, K-TT, Lastras Montaño, MA, Talin, AA, Salleo, A, Shastri, BJ, Ferreira de Lima, T, Tait, AN, Shen, Y, Meng, H, Roques-Carmes, C, Cheng, Z, Bhaskaran, H, Jariwala, D, Wang, H, Segall, K, Shainline, J, Yang, JJ, Roy, K, Datta, S, Raychowdhury, A