Share Email Print
cover

Proceedings Paper

Integrated devices for quantum information and quantum simulation with polarization encoded qubits
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The ability to manipulate quantum states of light by integrated devices may open new perspectives both for fundamental tests of quantum mechanics and for novel technological applications. The technology for handling polarization-encoded qubits, the most commonly adopted approach, was still missing in quantum optical circuits until the ultrafast laser writing (ULW) technique was adopted for the first time to realize integrated devices able to support and manipulate polarization encoded qubits.1 Thanks to this method, polarization dependent and independent devices can be realized. In particular the maintenance of polarization entanglement was demonstrated in a balanced polarization independent integrated beam splitter1 and an integrated CNOT gate for polarization qubits was realized and carachterized.2 We also exploited integrated optics for quantum simulation tasks: by adopting the ULW technique an integrated quantum walk circuit was realized3 and, for the first time, we investigate how the particle statistics, either bosonic or fermionic, influences a two-particle discrete quantum walk. Such experiment has been realized by adopting two-photon entangled states and an array of integrated symmetric directional couplers. The polarization entanglement was exploited to simulate the bunching-antibunching feature of non interacting bosons and fermions. To this scope a novel three-dimensional geometry for the waveguide circuit is introduced, which allows accurate polarization independent behaviour, maintaining a remarkable control on both phase and balancement of the directional couplers.

Paper Details

Date Published: 4 May 2012
PDF: 11 pages
Proc. SPIE 8440, Quantum Optics II, 84400D (4 May 2012); doi: 10.1117/12.924811
Show Author Affiliations
Linda Sansoni, Univ. degli Studi di Roma La Sapienza (Italy)
Fabio Sciarrino, Univ. degli Studi di Roma La Sapienza (Italy)
Istituto Nazionale di Ottica (Italy)
Paolo Mataloni, Univ. degli Studi di Roma La Sapienza (Italy)
Istituto Nazionale di Ottica (Italy)
Andrea Crespi, Istituto di Fotonica e Nanotecnologie (Italy)
Politecnico di Milano (Italy)
Roberta Ramponi, Istituto di Fotonica e Nanotecnologie (Italy)
Politecnico di Milano (Italy)
Roberto Osellame, Istituto di Fotonica e Nanotecnologie (Italy)
Politecnico di Milano (Italy)


Published in SPIE Proceedings Vol. 8440:
Quantum Optics II
Thomas Durt; Victor N. Zadkov, Editor(s)

© SPIE. Terms of Use
Back to Top