Miscibility and stability of dipolar bosonic mixtures

Lee, Au-Chen; Baillie, D.; Blakie, P. B.; Bisset, R. N.

doi:10.1103/physreva.103.063301

Cited by 15 publications

(11 citation statements)

References 53 publications

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“…Binary dipolar condensates also present another intriguing possibility. It has already been predicted that unmodulated binary BECs may be destabilized by spin roton excitations [32] (also see [33]), for which a periodic density modulation of one component develops out of phase with the other, as depicted in Fig. 1(a).…”

mentioning

confidence: 73%

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Alternating-domain supersolids in binary dipolar condensates

Bland¹,

Poli²,

Ardila³

et al. 2022

Preprint

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Two-component dipolar condensates are now experimentally producible, and we theoretically investigate the nature of supersolidity in this system. We predict the existence of a binary supersolid state in which the two components form a series of alternating domains, producing an immiscible double supersolid. Remarkably, we find that a dipolar component can even induce supersolidity in a nondipolar component. In stark contrast to single-component supersolids, the number of crystal sites is not strictly limited by the condensate populations, and the density is hence substantially lower. Our results are applicable to a wide range of dipole moment combinations, marking an important step towards long-lived bulk-supersolidity.

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confidence: 73%

“…For similar dipoles µ 2 ∼ µ 1 there is little energy incentive from the dipolar interactions for the components to phase separate [33], hence the immiscibility boundary in Fig. 3 is close to the nondipolar result a 12 = √ a 11 a 22 = 100a 0 , and the components separate to a macroscopicdomain immiscible state [39] [Fig.…”

mentioning

confidence: 93%

Alternating-domain supersolids in binary dipolar condensates

Bland¹,

Poli²,

Ardila³

et al. 2022

Preprint

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“…This presents a rich landscape for exploring new behavior. In recent work the miscibility and stability of a dipolar condensate mixture was studied in a harmonic trap [16]. This work found that criteria derived from a homogeneous theory provided a good quantitative prediction of the instabilities for various regimes, with the general observation that the miscible regime was reduced as the strength of the DDIs increased.…”

Section: Introductionmentioning

confidence: 99%

“…The interplay of immiscibility and the long-ranged interactions has been the subject of investigations exploring pattern formation and novel instabilities [14,15]. Also, a number of studies have considered properties of the condensate ground states in stationary [16] and in rotating frames [17][18][19][20] (also see [21]).…”

Section: Introductionmentioning

confidence: 99%

Stability of a flattened dipolar binary condensate: emergence of the spin roton

Lee,

Baillie,

Blakie

2022

Preprint

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We develop theory for a two-component miscible dipolar condensate in a planar trap. Using numerical solutions and a variational theory we solve for the excitation spectrum and identify regimes where density-and spin-roton excitations are favored. We characterize the various instabilities that can emerge in this system over a wide parameter regime and present results for the stability phase diagram. Importantly this allows us to identify the parameter regimes where a novel roton-immiscibility transition can occur, driven by the softening of the spin roton excitation.

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“…Consequently, the quasi-spin is more easily modulated than the total density, and even a moderate strength of DDI can generate quasi-spin patterns without causing dipolar collapse. Two-component mixtures of dipolar BECs have been experimentally realized [45,46] and theoretically investigated thoroughly [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]. A self-bound droplet including two components was also proposed [63,64].…”

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confidence: 99%

Long lifetime supersolid in a two-component dipolar Bose-Einstein condensate

Li,

Le,

Saito

2022

Preprint

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Recent studies on supersolidity in a single-component Bose-Einstein condensate (BEC) have relied on the Lee-Huang-Yang (LHY) correction for stabilization of self-bound droplets, which however involves a high density inside the droplets, limiting the lifetime of the supersolid. Here we propose a two-component mixture of dipolar and nondipolar BECs, such as an 166 Er-87 Rb mixture, to create and stabilize a supersolid without the LHY correction, which can suppress the atomic loss and may allow observation of the long-time dynamics of the supersolid. In such a system, supersolidity can be controlled by the difference in the trap centers between the two components.

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Miscibility and stability of dipolar bosonic mixtures

Cited by 15 publications

References 53 publications

Alternating-domain supersolids in binary dipolar condensates

Alternating-domain supersolids in binary dipolar condensates

Stability of a flattened dipolar binary condensate: emergence of the spin roton

Long lifetime supersolid in a two-component dipolar Bose-Einstein condensate

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