The Bipartite and Tripartite Entanglement in PT-Symmetric System

Duc, Vinh Le; Nowotarski, Mateusz; Kalaga, J. K.

doi:10.3390/sym13020203

Cited by 3 publications

(1 citation statement)

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“…We note that bipartite entanglement (unfilled regions) is predicted when the GME condition <0.5 and exists between two states within the full unreduced density matrix. 28 , 29 Therefore, controlled alternation between bipartite and tripartite entanglement is realized, which was recently confirmed to be attainable in non-Hermitian parity-time (PT) symmetric coupled cavity systems 30 , 31 along with inherent applications toward quantum teleportation.…”

Section: Tripartite Entanglementmentioning

confidence: 90%

Near-Field Generation and Control of Ultrafast, Multipartite Entanglement for Quantum Nanoplasmonic Networks

2022

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For a quantum Internet, one needs reliable sources of entangled particles that are compatible with measurement techniques enabling time-dependent, quantum error correction. Ideally, they will be operable at room temperature with a manageable decoherence versus generation time. To accomplish this, we theoretically establish a scalable, plasmonically based archetype that uses quantum dots (QD) as quantum emitters, known for relatively low decoherence rates near room temperature, that are excited using subdiffracted light from a near-field transducer (NFT). NFTs are a developing technology that allow rasterization across arrays of qubits and remarkably generate enough power to strongly drive energy transitions on the nanoscale. This eases the fabrication of QD media, while efficiently controlling picosecond-scale dynamic entanglement of a multiqubit system that approaches maximum fidelity, along with fluctuation between tripartite and bipartite entanglement. Our strategy radically increases the scalability and accessibility of quantum information devices while permitting fault-tolerant quantum computing using time-repetition algorithms.

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