English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The field of quantum information has been growing fast over the past decade.Optical quantum computation, based on the concepts of KLM and cluster states,has witnessed experimental realizations of larger and more complex systems interms of photon number. Quantum optical systems, which offer long coherencetimes and easy manipulation of single qubits, allow us to probe quantumproperties of the light itself and of the physical systems around it. Recently,a linear scheme for quantum computing, relying on the bosonic nature ofparticles, has been proposed and realized experimentally with photons. Theability to efficiently measure superpositions of quantum states consisting ofseveral photons is essential to the characterization of such systems. In fact,the entire field of quantum information completely relies on the ability torecover quantum states from measurements. However, the characterization ofquantum states requires many measurements, and often necessitates complicatedmeasurements schemes; for example, characterizing qubits requires measurements.Here, we utilize structure, inherent to physically interesting quantum statesof light, in order to reduce the complexity in the recovery of a quantum state.In particular, we devise a method enabling the recovery of three-photon quantumstates from only two-fold correlation measurements in a single setting. Theability to take two-fold coincidences instead of three-fold offers the recoveryof the quantum states in far less measurements and in a considerably higherSNR, because detection of two-photon events is much more likely than that ofthree-photon ones. The concept suggested here paves the way to further ideas onstructure-based super resolution in quantum state tomography, such asrecovering a quantum state in an unknown basis in a single setup and recoveringthe state of several photons without number resolving detectors.

Structure-Based Super-Resolution Recovery of Three-Photon Quantum States from Two-Fold Coincidences