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Jun 26 at 16:22 comment added Branimir Ćaćić The weak $2$-category of $C^\ast$-algebras, Hilbert $C^*$-correspondences, and unitary intertwiners was considered in some detail by Buss–Meyer–Zhu, though they refer to Echterhoff–Kaliszewski–Quinn–Raeburn for the proof that equivalences in this weak 2-category are precisely strong Morita equivalence bimodules.
Jun 26 at 14:38 history edited Dave Penneys CC BY-SA 4.0
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Jun 26 at 13:39 history edited Dave Penneys CC BY-SA 4.0
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Jun 26 at 13:28 history edited Dave Penneys CC BY-SA 4.0
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Jun 25 at 16:54 history edited Dave Penneys CC BY-SA 4.0
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Jun 25 at 16:16 history answered Dave Penneys CC BY-SA 4.0