Preparation of pure and mixed polarization qubits and the direct measurement of figures of merit
arXiv:quant-ph/0606191 · doi:10.1103/PhysRevA.75.012104
Abstract
Non-classical joint measurements can hugely improve the efficiency with which certain figures of merit of quantum systems are measured. We use such a measurement to determine a particular figure of merit, the purity, for a polarization qubit. In the process we highlight some of subtleties involved in common methods for generating decoherence in quantum optics.
arXiv comment5 pages, 3 figures, 1 table
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Cited by in corpus (8)
- Improving Quantum State Estimation with Mutually Unbiased Bases
- Direct method for measuring of purity, superfidelity, and subfidelity of photonic two-qubit mixed states
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- Bidirectional deep learning of polarization transfer in liquid crystals with application to quantum state preparation
- Implementation of controllable universal unital optical channels
- Conditional purity and quantum correlation measures in two qubit mixed states
- Identification of Decoherence-Free Subspaces Without Quantum Process Tomography
- Direct estimation of decoherence rates