Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Bao, Yimu"'
Autor:
Hauser, Jacob, Bao, Yimu, Sang, Shengqi, Lavasani, Ali, Agrawal, Utkarsh, Fisher, Matthew P. A.
Measurements can detect errors in a decohered quantum memory allowing active error correction to increase the memory time. Previous understanding of this mechanism has focused on evaluating the performance of error correction algorithms based on meas
Externí odkaz:
http://arxiv.org/abs/2407.07882
We define and classify symmetry-protected topological (SPT) phases in mixed states based on the tensor network formulation of the density matrix. In one dimension, we introduce strong injective matrix product density operators (MPDO), which describe
Externí odkaz:
http://arxiv.org/abs/2403.17069
The dynamics of open quantum systems can be simulated by unraveling it into an ensemble of pure state trajectories undergoing non-unitary monitored evolution, which has recently been shown to undergo measurement-induced entanglement phase transition.
Externí odkaz:
http://arxiv.org/abs/2306.17161
Topological quantum memory can protect information against local errors up to finite error thresholds. Such thresholds are usually determined based on the success of decoding algorithms rather than the intrinsic properties of the mixed states describ
Externí odkaz:
http://arxiv.org/abs/2301.05689
We develop an effective field theory characterizing the impact of decoherence on states with abelian topological order and on their capacity to protect quantum information. The decoherence appears as a temporal defect in the double topological quantu
Externí odkaz:
http://arxiv.org/abs/2301.05687
Publikováno v:
Phys. Rev. Lett. 129, 080501 (2022)
Generic many-body systems coupled to an environment lose their quantum entanglement due to decoherence and evolve to a mixed state with only classical correlations. Here, we show that measurements can stabilize quantum entanglement within open quantu
Externí odkaz:
http://arxiv.org/abs/2202.12905
Publikováno v:
Phys. Rev. Lett. 132, 030401 (2024)
How long does it take to entangle two distant qubits in a quantum circuit evolved by generic unitary dynamics? We show that if the time evolution is followed by measurements of all but two infinitely separated test qubits, then the entanglement betwe
Externí odkaz:
http://arxiv.org/abs/2110.06963
Publikováno v:
Phys. Rev. Lett. 128, 010604 (2022)
The competition between scrambling unitary evolution and projective measurements leads to a phase transition in the dynamics of quantum entanglement. Here, we demonstrate that the nature of this transition is fundamentally altered by the presence of
Externí odkaz:
http://arxiv.org/abs/2104.13372
Publikováno v:
Annals of Physics, 2021, 168618
Quantum circuits consisting of random unitary gates and subject to local measurements have been shown to undergo a phase transition, tuned by the rate of measurement, from a state with volume-law entanglement to an area-law state. From a broader pers
Externí odkaz:
http://arxiv.org/abs/2102.09164
Publikováno v:
Phys. Rev. B 101, 104301 (2020)
We present a theory of the entanglement transition tuned by measurement strength in qudit chains evolved by random unitary circuits and subject to either weak or random projective measurements. The transition can be understood as a nonanalytic change
Externí odkaz:
http://arxiv.org/abs/1908.04305