The capability to generate and manipulate quantum states in high-dimensional Hilbert spaces is a crucial step for the development of quantum technologies, from quantum communication to quantum computation. One-dimensional quantum walk dynamics represents a valid tool in the task of engineering arbitrary quantum states. Here we affirm such potential in a linear-optics platform that realizes discrete-time quantum walks in the orbital angular momentum degree of freedom of photons. Different classes of relevant qudit states in a six-dimensional space are prepared and measured, confirming the feasibility of the protocol. Our results represent a further investigation of quantum walk dynamics in photonics platforms, paving the way for the use of such a quantum state-engineering toolbox for a large range of applications.
Experimental engineering of arbitrary qudit states with discrete-time quantum walks / Giordani, Taira; Polino, Emanuele; Emiliani, Sabrina; Suprano, Alessia; Innocenti, Luca; Majury, Helena; Marrucci, Lorenzo; Paternostro, Mauro; Ferraro, Alessandro; Spagnolo, Nicolò; Sciarrino, Fabio. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 122:2(2019). [10.1103/PhysRevLett.122.020503]
Experimental engineering of arbitrary qudit states with discrete-time quantum walks
Giordani, Taira;Polino, Emanuele;Emiliani, Sabrina;Suprano, Alessia;Spagnolo, Nicolò;Sciarrino, Fabio
2019
Abstract
The capability to generate and manipulate quantum states in high-dimensional Hilbert spaces is a crucial step for the development of quantum technologies, from quantum communication to quantum computation. One-dimensional quantum walk dynamics represents a valid tool in the task of engineering arbitrary quantum states. Here we affirm such potential in a linear-optics platform that realizes discrete-time quantum walks in the orbital angular momentum degree of freedom of photons. Different classes of relevant qudit states in a six-dimensional space are prepared and measured, confirming the feasibility of the protocol. Our results represent a further investigation of quantum walk dynamics in photonics platforms, paving the way for the use of such a quantum state-engineering toolbox for a large range of applications.File | Dimensione | Formato | |
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