The single-atom box: bosonic staircase and effects of parity

Abstract

We have developed a theory of a Josephson junction formed by two tunnel-coupled Bose-Einstein condensates in a double-well potential in the regime of strong atom-atom interaction for an arbitrary total number $N$ of bosons in the condensates. The tunnel resonances in the junction are shown to be periodically spaced by the interaction energy, forming a single-atom staircase sensitive to the parity of $N$ even for large $N$. One of the manifestations of the staircase structure is the periodic modulation with the bias energy of the visibility of the interference pattern in lattices of junctions.

5 pages, 4 included figues, published version

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Cited by in corpus (13)

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• Spin-1 Atoms in Optical Superlattices: Single-Atom Tunneling and Entanglement
• A single fermion in a Bose Josephson Junction
• Analytical approach to the two-site Bose-Hubbard model: from Fock states to Schrödinger cat states and entanglement entropy
• Mean-Field Analysis of Spinor Bosons in Optical Superlattices
• Resonant persistent currents for ultracold bosons on a lattice ring
• Efficient generation of many-body singlet states of spin-1 bosons in optical superlattices
• Squeezed and fragmented states of strongly interacting bosons in a double well. Part II: Quantum Monte Carlo simulations
• Number squeezed and fragmented states of strongly interacting bosons in a double well
• Tunneling without tunneling: wavefunction reduction in a mesoscopic qubit