Magnetic-field gradiometer based on ultracold collisions

Wasak, Tomasz; Jachymski, Krzysztof; Calarco, Tommaso; Negretti, Antonio

doi:10.1103/physreva.97.052701

Cited by 7 publications

(5 citation statements)

References 61 publications

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“…Our results are helpful for realizing strong effective inter-atomic interaction of ultracold atoms in an quasi-1D confinement with localized impurities, which can be either spin-dependent or spin-independent. Such a system can be used for the study of Kondo physics [19][20][21][26][27][28], quantum open system [29] and precision measurement [30,31]. In addition, our result also show the existence of the broad CIRs for small positive 3D scattering length, and thus implies the possibility of finding such CIRs in more other confinements.…”

Section: Introductionsupporting

confidence: 60%

Confinement-induced resonance with weak background interaction

Zhang

2019

Phys. Rev. A

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We studied the scattering problem of two atoms with unequal mass, where one atom (atom α) is trapped in a quasi-one-dimensional (quasi-1D) tube and the other one (atom β) is localized by a 3D harmonic trap. We show that in such a system if atom α is much heavier than β, confinementinduced resonance (CIR) can appear when the 3D scattering length as of these two atoms is much smaller than the characteristic lengths (CLs) of the confinements, for either as > 0 or as < 0. This is quite different from the usual CIRs which occurs only when as is comparable with the CL of confinement. Moreover, the CIRs we find are broad enough that can serve as a tool for the control of effective inter-atomic interaction. We further show the mechanism of these CIRs via the Born-Oppenheimer approximation. Our results can be used for the realization of stronglyinteracting systems with ultracold atoms with weak 3D background interaction (i.e., small as), e.g., the realization of ultracold gases with strong spin-dependent interaction at zero magnetic field.

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Section: Introductionsupporting

confidence: 60%

Confinement-induced resonance with weak background interaction

Zhang

2019

Phys. Rev. A

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“…As for the neutral atomic counterpart, atom-ion or atom-dipole CIRs can be an additional 'knob' for manipulating the mixture's interaction in low spatial dimensions. For instance, CIRs can be utilised to steer the particle flow in Josephson junctions [9,29,30], to tune interactions in a Tomonaga-Luttinger liquid in which a linear ion crystal is immersed [31], for precise magnetometry [32,33], and quantum simulation [20,[34][35][36][37][38]. This is especially important in the atom-ion setting when state-dependent atom-ion interactions are needed to perform particular quantum information processing tasks.…”

Section: Introductionmentioning

confidence: 99%

Impact of ion motion on atom-ion confinement-induced resonances in hybrid traps

2019

Self Cite

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We investigate confinement-induced resonances in atom-ion quantum mixtures confined in hybrid traps for small atom-ion mass ratios. Specifically, we consider an ion confined in a time-dependent radio-frequency Paul trap with linear geometry, while the atom is constrained to move into a quasione-dimensional optical waveguide within the ion trap. We evaluate the impact of the ion intrinsic micromotion on the resonance position. Thus, we solve the atom-ion dynamics semiclassically, namely the atom dynamics is governed by the three-dimensional time-dependent Schrödinger equation, whereas the ion motion is described by the classical Hamilton equations. We find that the energy of the ion provided by the oscillating radiofrequency fields can affect the resonance position substantially. Notwithstanding, the peculiar phenomenology of those resonances regarding perfect transmission and reflection is still observable. These findings indicate that the intrinsic micromotion of the ion is not detrimental for the occurrence of the resonance and that its position can be controlled by the radiofrequency fields. This provides an additional mean for tuning atom-ion interactions in low spatial dimensions. The study represents an important advancement in the scattering physics of compound atomic quantum systems in time-dependent traps.

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“…A timely question is to explore mediated interactions between the impurities and understand to what extent analytical approaches effectively describe them. The interaction between quasi-particles is not only crucial for conventional and high-T c superconductivity [3,63], but it is also instrumental for developing quantum technologies with compound atom-ion systems such as quantum sensors [41,64,65] and hybrid interfaces for information processing [39,40]. Let us consider a concrete and technologically relevant example in this regard.…”

Section: Motivation and Summary Of The Main Resultsmentioning

confidence: 99%