Quantum-polarization state tomography

Abstract

We propose and demonstrate a method for quantum-state tomography of qudits encoded in the quantum polarization of $N$-photon states. This is achieved by distributing $N$ photons nondeterministically into three paths and their subsequent projection, which for $N=1$ is equivalent to measuring the Stokes (or Pauli) operators. The statistics of the recorded $N$-fold coincidences determines the unknown $N$-photon polarization state uniquely. The proposed, fixed setup manifestly rules out any systematic measurement errors due to moving components and allows for simple switching between tomography of different states, which makes it ideal for adaptive tomography schemes.

5 pages, 2 figures; modified model of photon-number resolving detectors, revised inclusion of detector quantum efficiencies in state reconstruction

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Cited by in corpus (14)

• Quantum metasurface for multi-photon interference and state reconstruction
• Scalable on-chip quantum state tomography
• Quantum optical frequency up-conversion for polarisation entangled qubits: towards interconnected quantum information devices
• Quantum state tomography with informationally complete POVMs generated in the time domain
• Phase estimation of time-bin qudits by time-resolved single-photon counting
• Quantum Polarimetry
• Quantum Tomography of Pure States with Projective Measurements Distorted by Experimental Noise
• Robust Classical and Quantum Polarimetry with a Single Nanostructured Metagrating
• In-line detection and reconstruction of multi-photon quantum states
• Experimental characterization of quantum polarization of three-photon states
• Entanglement quantification enhanced by dark count correction
• Are vector vortex beams endowed with any entanglement?
• A full characterization of the polarization of vector light beams
• 3D compact photonic circuits for realizing quantum state tomography of qudits in any finite dimension