Quantum State Compression Shadow
- URL: http://arxiv.org/abs/2312.13036v1
- Date: Wed, 20 Dec 2023 14:00:41 GMT
- Title: Quantum State Compression Shadow
- Authors: Chen Ding, Xiao-Yue Xu, Shuo Zhang, Wan-Su Bao, He-Liang Huang
- Abstract summary: In this study, we introduce an innovative readout architecture called Compression Shadow (CompShadow)
CompShadow transforms the conventional readout paradigm by compressing multi-qubit states into single-qubit shadows before measurement.
Our findings mark the emergence of a new era in quantum state readout, setting the stage for a revolutionary leap in quantum information processing capabilities.
- Score: 7.060202833581429
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum state readout serves as the cornerstone of quantum information
processing, exerting profound influence on quantum communication, computation,
and metrology. In this study, we introduce an innovative readout architecture
called Compression Shadow (CompShadow), which transforms the conventional
readout paradigm by compressing multi-qubit states into single-qubit shadows
before measurement. Compared to direct measurements of the initial quantum
states, CompShadow achieves comparable accuracy in amplitude and observable
expectation estimation while consuming similar measurement resources.
Furthermore, its implementation on near-term quantum hardware with
nearest-neighbor coupling architectures is straightforward. Significantly,
CompShadow brings forth novel features, including the complete suppression of
correlated readout noise, fundamentally reducing the quantum hardware demands
for readout. It also facilitates the exploration of multi-body system
properties through single-qubit probes and opens the door to designing quantum
communication protocols with exponential loss suppression. Our findings mark
the emergence of a new era in quantum state readout, setting the stage for a
revolutionary leap in quantum information processing capabilities.
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