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October 21, 20224:00 pm – 5:00 pm (CDT)

Rainbows in 2D quantum XY model: long-range entanglement and many-body teleportation.


Shenglong Xu (TAMU)


Shenglong Xu



Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

Long-range entanglement is a valuable resource for quantum information applications. In this talk, I will present a simple protocol to engineer long-range entangled states, the rainbow states, in the quantum XY model by iterative measurements on two local qubits with feedback control. The long-range entangled rainbow state appears as the unique steady state of the quantum operations.  I will show that the rainbow state can be used for quantum many-body teleportation, in which a single qubit state is teleported through the strongly-interacting quantum system as a result of thermalizing unitary dynamics and local measurements on a few qubits. The state engineering and teleportation protocols rely on a newly identified special scarred eigenstate in the XY model.

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