RT Journal Article
T1 Photonic quantum circuits with only synchronous directional couplers in ion-exchanged glass
A1 Liñares Beiras, Jesús
A1 Montero Orille, Carlos
A1 Prieto Blanco, Xesús
A1 Varela Carballo, Javier
A1 Balado Souto, Daniel
K1 Synchronous directional couplers
K1 Integrated phase shifters
K1 Ion-exchanged glass platform
AB We show that photonic quantum circuits for implementing arbitrary SU(N) transformations can be made using only synchronous directional couplers. These simple elements provide both beam splitting and phase shifting so that, under a proper concatenation of such elements, unitary transformations of arbitrary dimension can be implemented. The circuits made in this way are robust and controllable, because only one type of element is used and the technology involved in their fabrication is very mature. We present several examples of original passive photonic circuits intended for quantum projective measurements and quantum state generation due to their interest in photonic quantum technology for quantum key distribution systems. Likewise, we have designed, fabricated, and characterized, on an ion-exchanged glass platform, different couplers, which form the basic elements or building blocks of these passive circuits highly compatible with optical fibres.
PB IopScience
YR 2025
FD 2025-11-06
LK https://hdl.handle.net/10347/44047
UL https://hdl.handle.net/10347/44047
LA eng
NO Jesús Liñares et al 2026. Photonic quantum circuits with only synchronous directional couplers in ion-exchanged glass. J. Phys. Photonics 8 015003
NO Grant PRTR-C17.I1, the Galician Regional Government
NO MCIU / AEI / 10.13039/501100011033 / FEDER, UE (Project PID2023-152607NB-I00)
DS Minerva
RD 23 abr 2026