Describing a Quantum Channel by State Tomography of a Single Probe State
arXiv:0905.0512 · doi:10.1209/0295-5075/86/40007
Abstract
A general law is presented for (composite) quantum systems which directly describes the time evolution of quantum states (with one or both components) through an arbitrary noisy quantum channel. It is shown that the time evolution of all quantum states through a quantum channel can be completely captured by the evolution of a single 'probe state'. Thus in order to grasp the information of the final output states subject to a quantum channel, especially an unknown one, it only requires quantum state tomography of a single probe state, which dramatically simplifies the practical operations in experiment.
3 pages, To be publised in EPL
References in corpus (10)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Experimental quantum teleportation
- The Quantum Jump Approach to Dissipative Dynamics in Quantum Optics
- Decoherence, the measurement problem, and interpretations of quantum mechanics
- Scalable multi-particle entanglement of trapped ions
- Experimental entanglement of six photons in graph states
- Quantum Open System Theory: Bipartite Aspects
- Qubit Disentanglement and Decoherence via Dephasing
- A Factorization Law for Entanglement Decay
- Measurable entanglement for tripartite quantum pure states of qubits