Emergence of junction dynamics in a strongly interacting Bose mixture

Barfknecht, R. E.; Foerster, Angela; Zinner, N. T.

doi:10.1088/1367-2630/aac718

Cited by 7 publications

(7 citation statements)

References 70 publications

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“…These results show that when a sufficiently small barrier is inserted into the system with large value of ∆, the transfer time is reduced. An analogous effect for atoms in a harmonic double-well geometry has been obtained in [27]. This indicates that the effect discussed here does not depend on the details of the trapping potential, given that a certain interaction regime is assumed.…”

Section: B Single Barriersupporting

confidence: 78%

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State transfer in an inhomogeneous spin chain

Iversen,

Barfknecht,

Foerster

et al. 2019

Preprint

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We present an analytical study of state transfer in a spin chain in the presence of an inhomogeneous set of exchange coefficients. We initially consider the homogeneous case and describe a method to obtain the energy spectrum of the system. Under certain conditions, the state transfer time can be predicted by taking into account the energy gap between the two lowest energy eigenstates. We then generalize our approach to the inhomogeneous case and show that including a barrier in the chain can lead to a reduction of the state transfer time. We additionally extend our analysis to the case of multiple barriers. These advances may contribute to the understanding of spin transfer dynamics in long chains where connections between neighboring spins can be manipulated.

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Section: B Single Barriersupporting

confidence: 78%

“…1). We interpret the inhomogeneous cases as spin chains that are split by potential barriers and show that, given certain conditions, the presence of such barriers can in fact enhance the transfer of a spin across the chain [27]. Moreover, this effect does not require any dynamical control of the parameters.…”

Section: Introductionmentioning

confidence: 92%

State transfer in an inhomogeneous spin chain

Iversen,

Barfknecht,

Foerster

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…For zero temperature, this correspondence was confirmed using different approaches [17][18][19][20][21]. It has been extensively developed and applied in subsequent works [22][23][24][25][26]. Experimentally, the validity of the spinchain description was verified in a few-body setup [27].…”

Section: Introductionmentioning

confidence: 67%

Generation of spin currents by a temperature gradient in a two-terminal device

Barfknecht,

Foerster,

Zinner

et al. 2021

Preprint

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Theoretical and experimental investigations of the interaction between spins and temperature gradients are vital for the development of spin caloritronics, and can dictate the design of future spintronics devices. In this work, we propose a two-terminal cold-atom simulator to study that interaction. The proposed quantum simulator consists of strongly interacting atoms that occupy two reservoirs connected by a one-dimensional link. The reservoirs are kept at different temperatures. We show the existence of a spin current in this system by studying the dynamics that follows a spin-flip of an atom in the link. We argue that the dynamics in the link can be described using an inhomogeneous Heisenberg chain whose couplings are defined by the local temperature. A temperature gradient accelerates the impurity in one direction more than in the other, leading to an overall spin current. Therefore, our study offers a way to simulate certain features of the spin Seebeck effect with cold atoms.

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“…[189]). Finally, we note that this problem has attracted recently a lot of interest, also in other external trapping potentials, such as double wells or optical lattices [190,191] as well as in the case of attractive impurity [192]. In general, when the mass imbalance is present and for any number of particles, certain arrangements of unequal masses make the problem solvable for limits in unsolvable in the equal mass case [193].…”

Section: H Mixtures With Several Atomsmentioning

confidence: 99%

One-dimensional mixtures of several ultracold atoms: a review

Sowiński¹,

2019

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Recent theoretical and experimental progress on studying one-dimensional systems of bosonic, fermionic, and Bose-Fermi mixtures of a few ultracold atoms confined in traps is reviewed in the broad context of mesoscopic quantum physics. We pay special attention to limiting cases of very strong or very weak interactions and transitions between them. For bosonic mixtures, we describe the developments in systems of three and four atoms as well as different extensions to larger numbers of particles. We also briefly review progress in the case of spinor Bose gases of a few atoms. For fermionic mixtures, we discuss a special role of spin and present a detailed discussion of the two-and three-atom cases. We discuss the advantages and disadvantages of different computation methods applied to systems with intermediate interactions. In the case of very strong repulsion, close to the infinite limit, we discuss approaches based on effective spin chain descriptions. We also report on recent studies on higherspin mixtures and inter-component attractive forces. For both statistics, we pay particular attention to impurity problems and mass imbalance cases. Finally, we describe the recent advances on trapped Bose-Fermi mixtures, which allow for a theoretical combination of previous concepts, well illustrating the importance of quantum statistics and inter-particle interactions. Lastly, we report on fundamental questions related to the subject which we believe will inspire further theoretical developments and experimental verification. :1903.12189v3 [cond-mat.quant-gas] CONTENTS arXiv

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Emergence of junction dynamics in a strongly interacting Bose mixture

Cited by 7 publications

References 70 publications

State transfer in an inhomogeneous spin chain

State transfer in an inhomogeneous spin chain

Generation of spin currents by a temperature gradient in a two-terminal device

One-dimensional mixtures of several ultracold atoms: a review

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