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Physics - Applied & Technical Physics | Integrated Devices for Quantum Information with Polarization Encoded Qubits

Integrated Devices for Quantum Information with Polarization Encoded Qubits

Series: Springer Theses

Sansoni, Linda

2014, XII, 140 p. 48 illus., 29 illus. in color.

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  • Nominated as an outstanding Ph.D. thesis by the Sapienza University of Rome
  • Shows how photons can be made to behave like fermions
  • Experimental quantum transport demonstrates the quantumness underlying the real world
  • Includes a chapter on the realization of the missing building block for quantum information
Quantum information science has found great experimental success by exploiting single photons. To date, however, the majority of quantum optical experiments use large-scale (bulk) optical elements bolted down to an optical bench, an approach that ultimately limits the complexity and stability of the quantum circuits required for quantum science and technology. The realization of complex optical schemes involving large numbers of elements requires the introduction of waveguide technology to achieve the desired scalability, stability and miniaturization of the device. This thesis reports on surprising findings in the field of integrated devices for quantum information. Here the polarization of the photon is shown to offer a suitable degree of freedom for encoding quantum information in integrated systems. The most important results concern: the quantum interference of polarization entangled photons in an on-chip directional coupler; the realization of a Controlled-NOT (CNOT) gate operating with polarization qubits; the realization of a quantum walk of bosons and fermions in an ordered optical lattice; and the quantum simulation of Anderson localization of bosons and fermions simulated by polarization entangled photons in a disordered quantum walk. The findings presented in this thesis represent an important step towards the integration of a complete quantum photonic experiment in a chip.

Content Level » Research

Keywords » Anderson Localization - Integrated Devices for Quantum Information Processing - Laser Writing - Photon Polarization Qubit - Polarization Encoding - Quantum Information Science and Technology - Quantum Simulation - Quantum Transport - Quantum Walk on a Chip

Related subjects » Applied & Technical Physics - Atomic, Molecular, Optical & Plasma Physics - Quantum Physics

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