Generating entanglement with linear optics
arXiv:1702.05209 · doi:10.1103/PhysRevA.96.043861
Abstract
Entanglement is the basic building block of linear optical quantum computation, and as such understanding how to generate it in detail is of great importance for optical architectures. We prove that Bell states cannot be generated using only 3 photons in the dual-rail encoding, and give strong numerical evidence for the optimality of the existing 4 photon schemes. In a setup with a single photon in each input mode, we find a fundamental limit on the possible entanglement between a single mode Alice and arbitrary Bob. We investigate and compare other setups aimed at characterizing entanglement in settings more general than dual-rail encoding. The results draw attention to the trade-off between the entanglement a state has and the probability of postselecting that state, which can give surprising constant bounds on entanglement even with increasing numbers of photons.
arXiv comment13 pages, 10 figures, 1 table, comments welcome
References in corpus (14)
- Quantum entanglement
- Review article: Linear optical quantum computing
- Quantum information with Rydberg atoms
- Photonic quantum technologies
- Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems
- Universal Linear Optics
- On the role of entanglement in quantum computational speed-up
- From three-photon GHZ states to ballistic universal quantum computation
- Unified quantification of nonclassicality and entanglement
- Demonstration of efficient scheme for generation of "Event Ready" entangled photon pairs from single photon source
- Bipartite entanglement in systems of identical particles: the partial transposition criterion
- Entanglement robustness and geometry in systems of identical particles
- Linear optical quantum metrology with single photons --- Experimental errors, resource counting, and quantum Cramér-Rao bounds
- One-way quantum computation with four-dimensional photonic qudits
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