6533b7d4fe1ef96bd12620c3
RESEARCH PRODUCT
On-chip generation of high-dimensional entangled quantum states and their coherent control
David J. MossJosé AzañaLucia CaspaniChristian ReimerYu ZhangLuis Romero CortesMichael KuesBrent E. LittleBenjamin WetzelBenjamin WetzelStefania SciaraStefania SciaraAlfonso Carmelo CinoPiotr RoztockiSai T. ChuRoberto MorandottiRoberto Morandottisubject
Quantum opticFiber optics communicationQuantum imaging01 natural sciencesSettore ING-INF/01 - Elettronica010309 opticsOpen quantum systemQC350Quantum mechanics0103 physical sciencesQuantum information010306 general physicsQuantum information scienceQCSingle photons and quantum effectQuantum computerPhysicsQuantum networkMultidisciplinaryTheoryofComputation_GENERALIntegrated opticSettore ING-INF/02 - Campi ElettromagneticiQuantum PhysicsQC0350Quantum technologyPhotonicsQuantum teleportationdescription
Optical quantum states based on entangled photons are essential for solving questions in fundamental physics and are at the heart of quantum information science1. Specifically, the realization of high-dimensional states (D-level quantum systems, that is, qudits, with D > 2) and their control are necessary for fundamental investigations of quantum mechanics2, for increasing the sensitivity of quantum imaging schemes3, for improving the robustness and key rate of quantum communication protocols4, for enabling a richer variety of quantum simulations5, and for achieving more efficient and error-tolerant quantum computation6. Integrated photonics has recently become a leading platform for the compact, cost-efficient, and stable generation and processing of non-classical optical states7. However, so far, integrated entangled quantum sources have been limited to qubits (D = 2)8, 9, 10, 11. Here we demonstrate on-chip generation of entangled qudit states, where the photons are created in a coherent superposition of multiple high-purity frequency modes. In particular, we confirm the realization of a quantum system with at least one hundred dimensions, formed by two entangled qudits with D = 10. Furthermore, using state-of-the-art, yet off-the-shelf telecommunications components, we introduce a coherent manipulation platform with which to control frequency-entangled states, capable of performing deterministic high-dimensional gate operations. We validate this platform by measuring Bell inequality violations and performing quantum state tomography. Our work enables the generation and processing of high-dimensional quantum states in a single spatial mode.
year | journal | country | edition | language |
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2017-06-29 |