Here we present the experimental distribution of four-dimensional entangled qudits between integrated photonic devices. Qudits offer advantages over qubits such as higher information capacity, and improved noise robustness. Integrated photonics allows for the reliable preparation and manipulation of large-scale entangled quantum states on a single device, with outstanding phase stability. However, reliable transmission of these states between devices, integrated or otherwise, has been a challenge, mainly due to the difficulty of maintaining phase stability between multiple optical channels. We implement an active phase stabilisation algorithm, utilising the same circuitry as for the quantum states, enabling stable distribution of qudits.
Quantum communication, i.e., the ability to transport a quantum state from one place to another, represents a crucial task for many quantum applications, i.e. quantum cryptography, quantum secret sharing and quantum networks. However current systems present main limitations in terms of low information rates, short propagation distances and low compatibility with today classical optical infrastructure. These restrictions bound the development of this field and its practical applications. High-dimensional quantum communication can help in overcoming these challenges enhancing the information rate and the system error tolerance. We here report our recent results on high-dimensional fiber based quantum communication, both with multicore and multimode fibers, in which we prove the capability of preparing, manipulating, transmitting and measuring advanced quantum states with excellent fidelities. Our results pave the way towards high-dimensional quantum communication in an optical fiber infrastructure.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.