Path-polarization hyperentangled and cluster states of photons on a chip[J]. LSA, 2016,5(2).
Ciampini, M. A. et al. Path-polarization hyperentangled and cluster states of photons on a chip. Light: Science & Applications, 5, e16064 (2016).
Path-polarization hyperentangled and cluster states of photons on a chip[J]. LSA, 2016,5(2). DOI: 10.1038/lsa.2016.64.
Ciampini, M. A. et al. Path-polarization hyperentangled and cluster states of photons on a chip. Light: Science & Applications, 5, e16064 (2016). DOI: 10.1038/lsa.2016.64.
Path-polarization hyperentangled and cluster states of photons on a chip
Encoding many qubits in different degrees of freedom (DOFs) of single photons is one of the routes toward enlarging the Hilbert space spanned by a photonic quantum state. Hyperentangled photon states (that is
states showing entanglement in multiple DOFs) have demonstrated significant implications for both fundamental physics tests and quantum communication and computation. Increasing the number of qubits of photonic experiments requires miniaturization and integration of the basic elements
and functions to guarantee the setup stability
which motivates the development of technologies allowing the precise control of different photonic DOFs on a chip. We demonstrate the contextual use of path and polarization qubits propagating within an integrated quantum circuit. We tested the properties of four-qubit linear cluster states built on both DOFs
and we exploited them to perform the Grover's search algorithm according to the one-way quantum computation model. Our results pave the way toward the full integration on a chip of hybrid multi-qubit multiphoton states.
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