Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-calibrating Quantum State Tomography   We introduce and experimentally demonstrate a technique for performing
quantum state tomography on multiple-qubit states despite incomplete knowledge
about the unitary operations used to change the measurement basis. Given
unitary operations with unknown rotation angles, our method can be used to
reconstruct the density matrix of the state up to local sigma-z rotations as
well as recover the magnitude of the unknown rotation angle. We demonstrate
high-fidelity self-calibrating tomography on polarization-encoded one- and
two-photon states. The unknown unitary operations are realized in two ways:
using a birefringent polymer sheet---an inexpensive smartphone screen
protector---or alternatively a liquid crystal wave plate with a tuneable
retardance. We explore how our technique may be adapted for quantum state
tomography of systems such as biological molecules where the magnitude and
orientation of the transition dipole moment is not known with high accuracy.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th