Measurement-induced phase transitions in the toric code
Measurement-induced phase transitions in the toric code
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复曲面码中测量引起的相变
DOI:
10.1103/physrevb.109.125148
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发表时间:
2023
影响因子:
3.7
通讯作者:
T. Hsieh
中科院分区:
文献类型:
--
作者:
Amir;S. Sahu;T. Hsieh
We show how distinct phases of matter can be generated by performing random single-qubit measurements on a subsystem of toric code. Using a parton construction, such measurements map to random Gaussian tensor networks, and in particular, random Pauli measurements map to a classical loop model in which watermelon correlators precisely determine measurement-induced entanglement. Measuring all but a 1d boundary of qubits realizes hybrid circuits involving unitary gates and projective measurements in 1+1 dimensions. We find that varying the probabilities of different Pauli measurements can drive transitions in the un-measured boundary between phases with different orders and entanglement scaling, corresponding to short and long loop phases in the classical model. Furthermore, by utilizing single-site boundary unitaries conditioned on the bulk measurement outcomes, we generate mixed state ordered phases and transitions that can be experimentally diagnosed via linear observables. This demonstrates how parton constructions provide a natural framework for measurement-based quantum computing setups to produce and manipulate phases of matter.
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影响因子:
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