Measuring Entanglement in a Photonic Embedding Quantum Simulator
arXiv:1506.05108 · doi:10.1103/PhysRevLett.116.070503
Abstract
Measuring entanglement is a demanding task that usually requires full tomography of a quantum system, involving a number of observables that grows exponentially with the number of parties. Recently, it was suggested that adding a single ancillary qubit would allow for the efficient measurement of concurrence, and indeed any entanglement monotone associated to antilinear operations. Here, we report on the experimental implementation of such a device---an embedding quantum simulator---in photonics, encoding the entangling dynamics of a bipartite system into a tripartite one. We show that bipartite concurrence can be efficiently extracted from the measurement of merely two observables, instead of fifteen, without full tomographic information.
Updated version
References in corpus (8)
- Scalable multi-particle entanglement of trapped ions
- 14-qubit entanglement: creation and coherence
- Experimental demonstration of Shor's algorithm with quantum entanglement
- Demonstration of Shor's quantum factoring algorithm using photonic qubits
- Experimental demonstration of topological error correction
- Constructing N-qubit entanglement monotones from anti-linear operators
- Efficient Measurement of Multiparticle Entanglement with Embedding Quantum Simulator
- Entanglement Measures in Ion-Trap Quantum Simulators without Full Tomography
Cited by in corpus (11)
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- Imaginarity-free quantum multiparameter estimation
- Fermion-antifermion scattering via boson exchange in a trapped ion
- Efficient Measurement of Multiparticle Entanglement with Embedding Quantum Simulator
- Entanglement Measures in Embedding Quantum Simulators with Nuclear Spins
- Algorithmic quantum simulation of memory effects
- Improving direct state measurements by using rebits in real enlarged Hilbert spaces
- Switchable Particle Statistics with an Embedding Quantum Simulator
- Continuous monitoring measured signals bounded by past and future conditions in enlarged quantum systems