Experimental characterization of quantum dynamics through many-body interactions
arXiv:1205.2490 · doi:10.1103/PhysRevLett.110.060403
Abstract
We report on the implementation of a quantum process tomography (QPT) technique known as direct characterization of quantum dynamics (DCQD) applied on coherent and incoherent single- qubit processes in a system of trapped calcium 40 ions. Using quantum correlations with an ancilla qubit, DCQD reduces exponentially the number of experimental configurations required for standard QPT. With this technique, the system's relaxation times T1 and T2 were measured with a single experimental configuration. We further show the first complete characterization of single-qubit processes using a single generalized measurement realized through multi-body correlations with three ancilla qubits.
(7 pages, 4 figures) This is part of a joint submission with an implementation with hyperentangled photons: "Hyperentanglement-enabled Direct Characterization of Quantum Dynamics" by T.M. Graham, J.T. Barreiro, M. Mohseni and P.G. Kwiat
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Cited by in corpus (8)
- A quantum information processor with trapped ions
- Hyperentanglement-enabled Direct Characterization of Quantum Dynamics
- Quantum Process Tomography by 2D Fluorescence Spectroscopy
- Coherence and quantum correlations measure sensitivity to dephasing channels
- Suppressing Amplitude Damping in Trapped Ions: Discrete Weak Measurements for a Non-unitary Probabilistic Noise Filter
- Benchmarking quantum gates and circuits
- Direct Characterization of Quantum Dynamics with Noisy Ancilla
- Discrimination of correlated and entangling quantum channels with selective process tomography