What can unitary sequences tell us about multi-time physics?

Understand

Multi-time quantum processes are endowed with the same richness as multipartite states, including temporal entanglement and exotic causal structures.

• However, experimentally probing these rich phenomena leans heavily on fast and clean mid-circuit measurements, which are rarely available.
• We show here how surprisingly accessible these phenomena are in nascent quantum processors even when faced with substantially limited control.
• We work within the limitation where only unitary control is allowed, followed by a terminating measurement.