Entanglement Structure and Information Protection in Noisy Hybrid Quantum Circuits.

Shuo Liu, Ming-Rui Li, Shi-Xin Zhang, Shao-Kai Jian
Author Information
  1. Shuo Liu: Institute for Advanced Study, Tsinghua University, Beijing 100084, China.
  2. Ming-Rui Li: Institute for Advanced Study, Tsinghua University, Beijing 100084, China.
  3. Shi-Xin Zhang: Tencent Quantum Laboratory, Tencent, Shenzhen, Guangdong 518057, China.
  4. Shao-Kai Jian: Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA.

Abstract

In the context of measurement-induced entanglement phase transitions, the influence of quantum noises, which are inherent in real physical systems, is of great importance and experimental relevance. In this Letter, we present a comprehensive theoretical analysis of the effects of both temporally uncorrelated and correlated quantum noises on entanglement generation and information protection. This investigation reveals that entanglement within the system follows q^{-1/3} scaling for both types of quantum noises, where q represents the noise probability. The scaling arises from the Kardar-Parisi-Zhang fluctuation with effective length scale L_{eff}∼q^{-1}. More importantly, the information protection timescales of the steady states are explored and shown to follow q^{-1/2} and q^{-2/3} scaling for temporally uncorrelated and correlated noises, respectively. The former scaling can be interpreted as a Hayden-Preskill protocol, while the latter is a direct consequence of Kardar-Parisi-Zhang fluctuations. We conduct extensive numerical simulations using stabilizer formalism to support the theoretical understanding. This Letter not only contributes to a deeper understanding of the interplay between quantum noises and measurement-induced phase transition but also provides a new perspective to understand the effects of Markovian and non-Markovian noises on quantum computation.

Word Cloud

Created with Highcharts 10.0.0noisesquantumscalingentanglementmeasurement-inducedphaseLettertheoreticaleffectstemporallyuncorrelatedcorrelatedinformationprotectionKardar-Parisi-Zhangunderstandingcontexttransitionsinfluenceinherentrealphysicalsystemsgreatimportanceexperimentalrelevancepresentcomprehensiveanalysisgenerationinvestigationrevealswithinsystemfollowsq^{-1/3}typesqrepresentsnoiseprobabilityarisesfluctuationeffectivelengthscaleL_{eff}∼q^{-1}importantlytimescalessteadystatesexploredshownfollowq^{-1/2}q^{-2/3}respectivelyformercaninterpretedHayden-PreskillprotocollatterdirectconsequencefluctuationsconductextensivenumericalsimulationsusingstabilizerformalismsupportcontributesdeeperinterplaytransitionalsoprovidesnewperspectiveunderstandMarkoviannon-MarkoviancomputationEntanglementStructureInformationProtectionNoisyHybridQuantumCircuits

Similar Articles

Cited By