Journal
PHYSICAL REVIEW RESEARCH
Volume 3, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.3.023081
Keywords
-
Categories
Funding
- National Natural Science Foundation Regional Innovation and Development Joint Fund [932021070]
- National Natural Science Foundation of China [912122020]
- China Postdoctoral Science Foundation [861905020051]
- Fundamental Research Funds for the Central Universities [841912027, 842041012, 201961009]
- Applied Research Project of Postdoctoral Fellows in Qingdao [861905040045]
- Young Talents Project at Ocean University of China [861901013107]
Ask authors/readers for more resources
The study introduces a novel entanglement-assisted sequential quantum random access code protocol that enables device-independent tasks. By relaxing certain measurement limits, the sharpness modulation region is expanded, with experimental results showing performance more than 27 standard deviations above classical bounds.
The sequential quantum random access code (QRAC) allows two or more decoders to obtain a desired message with higher success probability than the best classical bounds by appropriately modulating the measurement sharpness. Here, we propose an entanglement-assisted sequential QRAC protocol which can enable device-independent tasks. By relaxing the equal sharpness and mutually unbiased measurement limits, we widen the sharpness modulation region from a one-dimensional interval to a two-dimensional triangle. Then, we demonstrate our scheme experimentally and get more than 27 standard deviations above the classical bound even when both decoders perform approximately projective measurements. We use the observed success probability to quantify the connection among sequential QRAC, measurement sharpness, measurement biasedness, and measurement incompatibility. Finally, we show that our protocol can be applied to sequential device-independent randomness expansion and our measurement strategy can enhance the success probability of decoding the entire input string. Our results may promote a deeper understanding of the relationship among quantum correlation, quantum measurement, and quantum information processing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available