Mitigating quantum errors via truncated Neumann series
Quantum gates and measurements on quantum hardware are inevitably subject to hardware imperfections that lead to quantum errors. Mitigating such unavoidable errors is crucial to …
Researchers make progress on quantum dense coding with locality constraints on decoder
The researchers explored the practicality of dense coding by elaborating 21 classes of dense coding capacities with different encoder-decoder pairs, where the encoders are …
Dense Coding with Locality Restriction on Decoders: Quantum Encoders versus Superquantum Encoders
We investigate practical dense coding by imposing locality restrictions on decoders and symmetry restrictions on encoders within the resource theory of asymmetry framework. In this …
masahito-hayashi
Experimental optimal verification of three-dimensional entanglement on a silicon chip
High-dimensional entanglement is significant for the fundamental studies of quantum physics and offers unique advantages in various quantum information processing tasks. Integrated …
lijun-xia
Detecting and quantifying entanglement on near-term quantum devices
Quantum entanglement is a key resource in quantum technology, and its quantification is a vital task in the current noisy intermediate-scale quantum (NISQ) era. This paper combines …
Physical Implementability of Linear Maps and Its Application in Error Mitigation
A computable measure of physical implementability quantifies the cost of simulating nonphysical linear maps and establishes fundamental sampling limits for quasiprobability-based …
jiaqing-jiang
Measurement Error Mitigation via Truncated Neumann Series
Measurements on near-term quantum processors are inevitably subject to hardware imperfections that lead to readout errors. Mitigation of such unavoidable errors is crucial to …
Finite Block Length Analysis on Quantum Coherence Distillation and Incoherent Randomness Extraction
We give the first systematic study on the second order asymptotics of the operational task of coherence distillation with and without assistance. In the unassisted setting, we …
masahito-hayashi
Permutation Enhances Classical Communication Assisted by Entangled States
We study classical communication over a noisy quantum channel when bipartite states are preshared between the sender and the receiver, and one of the following encoding strategies …
Towards the standardization of quantum state verification using optimal strategies
Quantum devices for generating entangled states have been extensively studied and widely used. As so, it becomes necessary to verify that these devices truly work reliably and …
xinhe-jiang