Evading Vacuum Noise: Wigner Projections or Husimi Samples?
arXiv:1604.07692 · doi:10.1103/PhysRevLett.117.070801
Abstract
The accuracy in determining the quantum state of a system depends on the type of measurement performed. Homodyne and heterodyne detection are the two main schemes in continuous-variable quantum information. The former leads to a direct reconstruction of the Wigner function of the state, whereas the latter samples its Husimi ~function. We experimentally demonstrate that heterodyne detection outperforms homodyne detection for almost all Gaussian states, the details of which depend on the squeezing strength and thermal noise.
6 pages, 4 figures
References in corpus (5)
- Gaussian states in continuous variable quantum information
- Quantum state estimation with informationally overcomplete measurements
- Quantum reconstruction of an intense polarization squeezed optical state
- An effective method to estimate multidimensional Gaussian states
- Quantum polarization tomography of bright squeezed light
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