A bosonic Josephson junction

Gati, R.; Oberthaler, Markus K.

doi:10.1088/0953-4075/40/10/r01

Cited by 368 publications

(551 citation statements)

References 59 publications

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“…So far most experiments with BEC in a double-well potential were performed with atoms with repulsive interactions [8,16]. On the other hand experimental data can be collected over very long time, up to a few seconds.…”

Section: Decoherencementioning

confidence: 99%

“…Note that the Josephson junction in this system consists of the two localized matter wave packets in the two wells coupled via tunneling of particles through the potential barrier. The authors of [8] presented the experimental realization of the atomic Josephson Junction and compared the data obtained experimentally with predictions of a many-body two-mode model and a mean-field description.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Revivals in an attractive Bose-Einstein condensate in a double-well potential and their decoherence

Pawłowski¹,

Ziń²,

Rza̧żewski³

et al. 2011

Phys. Rev. A

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We study the dynamics of ultracold attractive atoms in a weakly linked two potential wells. We consider an unbalanced initial state and monitor dynamics of the population difference between the two wells. The average imbalance between wells undergoes damped oscillations, like in a classical counterpart, but then it revives almost to the initial value. We explain in details the whole behavior using three different models of the system. Furthermore we investigate the sensitivity of the revivals on the decoherence caused by one-and three-body losses. We include the dissipative processes using appropriate master equations and solve them using the stochastic wave approximation method.

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Section: Decoherencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Revivals in an attractive Bose-Einstein condensate in a double-well potential and their decoherence

Pawłowski¹,

Ziń²,

Rza̧żewski³

et al. 2011

Phys. Rev. A

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show abstract

“…In addition to the discussed dark soliton example, our results should be applicable to many other systems such as Bose gases in a doublewell potential [30], fragmenting bright solitons [12,13] or symmetrically colliding fragments in a harmonic trap [15,60]. If the central density turns out to be vanishing or too small such that g 2 (0, 0) becomes effectively ill-defined, the whole analysis has to be carried out in momentum space via long ToF measurements.…”

Section: Discussionmentioning

confidence: 98%

Two-body correlations and natural-orbital tomography in ultracold bosonic systems of definite parity

Krönke

Schmelcher

2015

Phys. Rev. A

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The relationship between natural orbitals, one-body coherences and two-body correlations is explored for bosonic many-body systems of definite parity with two occupied single-particle states. We show that the strength of local two-body correlations at the parity-symmetry center characterizes the number state distribution and controls the structure of non-local two-body correlations. A recipe for the experimental reconstruction of the natural orbital densities and quantum depletion is derived. These insights into the structure of the many-body wave-function are applied to the predicted quantum-fluctuations induced decay of dark solitons.

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“…The observed adiabaticity breakdown, which can not be found in the conventional two-level LZ problem, is a result of the inter-particle interaction. Due to the inter-particle interaction, swallow-tail-shaped loop structures [45,46], which correspond to the macroscopic quantum self-trapping in mean-field models [47][48][49][50][51][52][53][54][55], may ap-pear in the energy spectrum for our BHL system. Unlike the conventional two-level LZ problem, whose energylevel structures for the ground state and the highestexcited state are similar, the energy-level structures for the ground state and the highest-excited state of our BHL system are very different.…”

Section: B Population Dynamicsmentioning

confidence: 99%

Cluster Gutzwiller study of the Bose-Hubbard ladder: Ground-state phase diagram and many-body Landau-Zener dynamics

et al. 2015

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We present a cluster Gutzwiller mean-field study for ground states and time-evolution dynamics in the Bose-Hubbard ladder (BHL), which can be realized by loading Bose atoms in double-well optical lattices. In our cluster mean-field approach, we treat each double-well unit of two lattice sites as a coherent whole for composing the cluster Gutzwiller ansatz, which may remain some residual correlations in each two-site unit. For a unbiased BHL, in addition to conventional superfluid phase and integer Mott insulator phases, we find that there are exotic fractional insulator phases if the inter-chain tunneling is much stronger than the intra-chain one. The fractional insulator phases can not be found by using a conventional mean-field treatment based upon the single-site Gutzwiller ansatz. For a biased BHL, we find there appear single-atom tunneling and interaction blockade if the system is dominated by the interplay between the on-site interaction and the inter-chain bias. In the many-body Landau-Zener process, in which the inter-chain bias is linearly swept from negative to positive or vice versa, our numerical results are qualitatively consistent with the experimental observation [Nat. Phys. 7, 61 (2011)]. Our cluster bosonic Gutzwiller treatment is of promising perspectives in exploring exotic quantum phases and time-evolution dynamics of bosonic particles in superlattices.

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A bosonic Josephson junction

Cited by 368 publications

References 59 publications

Revivals in an attractive Bose-Einstein condensate in a double-well potential and their decoherence

Revivals in an attractive Bose-Einstein condensate in a double-well potential and their decoherence

Two-body correlations and natural-orbital tomography in ultracold bosonic systems of definite parity

Cluster Gutzwiller study of the Bose-Hubbard ladder: Ground-state phase diagram and many-body Landau-Zener dynamics

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