Precise
creation, characterization, and manipulation of single optical qubits
(pp503-517)
N. Peters, J. Altepeter, E. Jeffrey, D. Branning, and P. Kwiat
doi:
https://doi.org/10.26421/QIC3.s-4
Abstracts:
We present the theoretical basis for and experimental
verification of arbitrary single-qubit state generation, using the
polarization of photons generated via spontaneous parametric
downconversion. Our precision measurement and state reconstruction
system has the capability to distinguish over 3 million states, all of
which can be reproducibly generated using our state creation apparatus.
In order to complete the triumvirate of single qubit control, there must
be a way to not only manipulate single qubits after creation and before
measurement, but a way to characterize the manipulations themselves.
We present a general representation of arbitrary processes, and
experimental techniques for generating a variety of single qubit
manipulations, including unitary, decohering, and (partially) polarizing
operations.
Key words: photon
polarization, qubit, quantum process, tomography, parametric
down-conversion |