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High Energy Theory Seminar

Friday, January 6, 2023
11:00am to 12:00pm
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Measurement-induced phase transition in teleportation and wormholes
Alexey Milekhin, UC Santa Barbara,

Recently discovered measurement-induced phase transitions demonstrated that quantum systems are often resilient to noise. However, decoherence coming from measurements is not always "bad": many quantum teleportation protocols are based on measurements. In my talk I ask: are there any phase transitions if I apply such teleportation protocols at high rates? Specifically, I study Gao--Jafferis--Wall and Kitaev--Yoshida protocols in Sachdev--Ye--Kitaev (SYK) model. I argue that for both of these protocols there is a phase transition to a phase with an enhanced teleportation rate. SYK has a holographic gravity dual, there this transition corresponds to the formation of an eternal traversable wormhole. In the Kitaev--Yoshida case, this novel type of wormhole is supported by continuous projections (also known as forced measurements).
Based on arXiv: 2210.03083

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