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Generating accessible entanglement in bosons via pair-correlated tunneling
- Publication Year :
- 2019
-
Abstract
- We consider an extended Bose-Hubbard model that includes pair-correlated tunneling. We demonstrate that a minimal four-mode implementation of this model exhibits a pair-correlated regime in addition to Mott insulator and superfluid regimes. We propose a low complexity variational subspace for the ground state of the system in the pair-correlated regime, which we find to be numerically exact in pure pair-tunneling limit. Additionally, we propose a parameter-free high fidelity model wave function that qualitatively captures the features of the ground state in the pair-correlated regime. Although the operationally accessible entanglement vanishes deep inside the Mott insulator and superfluid regimes due to particle number conservation, we find that in the pure pair-correlated tunneling limit the accessible entanglement entropy grows logarithmically with the number of particles. Furthermore, we demonstrate that upon application of a unitary beamsplitter operation, the pair-correlated ground state is transformed into a state with completely accessible entanglement that is not limited by super-selection rules.<br />8 pages, 3 figures
- Subjects :
- Physics
Condensed Matter::Quantum Gases
Superselection
Quantum Physics
Mott insulator
FOS: Physical sciences
Quantum entanglement
01 natural sciences
010305 fluids & plasmas
Superfluidity
Quantum mechanics
0103 physical sciences
Quantum Physics (quant-ph)
010306 general physics
Ground state
Wave function
Quantum tunnelling
Boson
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....71edf318736c54126ae119536540f783