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Random insights into the complexity of two-dimensional tensor network calculations
Sofia Gonzalez-Garcia, Shengqi Sang, Timothy H. Hsieh +4
Projected entangled pair states (PEPS) offer memory-efficient representations of some quantum many-body states that obey an entanglement area law, and are the basis for classical s…
Measurement-induced phase transitions in the toric code
Amir-Reza Negari, Subhayan Sahu, Timothy H. 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 m…
Experimental demonstration of the advantage of adaptive quantum circuits
Michael Foss-Feig, Arkin Tikku, Tsung-Cheng Lu +16
Adaptive quantum circuits employ unitary gates assisted by mid-circuit measurement, classical computation on the measurement outcome, and the conditional application of future unit…
Channeling quantum criticality
Yijian Zou, Shengqi Sang, Timothy H. Hsieh
We analyze the effect of decoherence, modelled by local quantum channels, on quantum critical states and we find universal properties of the resulting mixed state's entanglement, b…
Probing sign structure using measurement-induced entanglement
Cheng-Ju Lin, Weicheng Ye, Yijian Zou +2
The sign structure of quantum states is closely connected to quantum phases of matter, yet detecting such fine-grained properties of amplitudes is subtle. Here we employ as a diagn…
Entanglement Dynamics of Noisy Random Circuits
Zhi Li, Shengqi Sang, Timothy H. Hsieh
The process by which open quantum systems thermalize with an environment is both of fundamental interest and relevant to noisy quantum devices. As a minimal model of this process,…