Prospects of Forming High-Spin Polar Molecules from Ultracold Atoms

Frye, Matthew D.; Cornish, Simon L.; Hutson, Jeremy M.

doi:10.1103/physrevx.10.041005

Cited by 12 publications

(7 citation statements)

References 97 publications

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“…Numerous bialkali molecules have been created in this way, including KRb [36], Cs 2 [37], Rb 2 [38], RbCs [39,40], NaK [41][42][43], NaRb [44], and NaLi [45]. Significant progress is also being made toward producing molecules from mixtures of open-shell and closed-shell atoms [46][47][48][49][50][51]. The second method employs direct laser cooling of molecules.…”

Section: Introductionmentioning

confidence: 99%

Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

et al. 2020

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We investigate the effects of static electric and magnetic fields on the differential ac Stark shifts for microwave transitions in ultracold bosonic 87 Rb 133 Cs molecules, for light of wavelength λ = 1064 nm. Near this wavelength we observe unexpected two-photon transitions that may cause trap loss. We measure the ac Stark effect in external magnetic and electric fields, using microwave spectroscopy of the first rotational transition. We quantify the isotropic and anisotropic parts of the molecular polarizability at this wavelength. We demonstrate that a modest electric field can decouple the nuclear spins from the rotational angular momentum, greatly simplifying the ac Stark effect. We use this simplification to control the ac Stark shift using the polarization angle of the trapping laser.

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Section: Introductionmentioning

confidence: 99%

Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

et al. 2020

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“…Future work might also explore the finite-temperature behaviour of this system, e.g., to ascertain the existence of a Fourier's law for the energy transfer between the two chains due to the coupling. These potential avenues for future research point to the potential of this rich model, and support the interest to explore its potential realization in a quantum simulator based on ultracold polar molecules [3,9] or highly magnetic atoms [10].…”

Section: Discussionmentioning

confidence: 59%

“…Ultracold polar molecules [3,9] and ultracold magnetic atoms [10] constitute good candidates to quantum simu- * abhishek.agarwal@npl.co.uk late multiferroicity because they can possess both electric dipole moments (EDMs) and magnetic dipole moments (MDMs). While mapping our Hamiltonian to that of a realistic physical system is outside the scope of this paper, we choose Hamiltonian parameters in accordance with physical parameters achievable in these ultracold platforms.…”

Section: Introductionmentioning

confidence: 99%

Phase diagram and post-quench dynamics in a double spin-chain system in transverse fields

Agarwal¹,

Hughes²,

Mur-Petit³

2021

Preprint

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We propose and explore the physics of a toy multiferroic model by coupling two distinct dipolar XXZ models in transverse fields. We determine first the rich ground-state phase diagram of the model using density matrix renormalization group techniques. Then, we explore the dynamics of the system after global and local quenches, using the time-evolving block decimation algorithm. After a global quench, the system displays decaying coupled oscillations of the electric and magnetic spins, in agreement with the Eigenstate Thermalization Hypothesis (ETH) for many-body interacting quantum systems. Notably, the spin-spin interactions lead to a sizeable quadratic shift in the oscillation frequency as the inter-chain coupling is increased. Local quenches lead to a light-cone-like propagation of excitations. In this case, the inter-chain coupling drives a transfer of energy between the chains that generates a novel fast spin-wave mode along the 'magnetic' chain at the speed of the 'electric' spin-wave. This suggests a limited control mechanism for faster information transfer in magnetic spin chains using electric fields that harnesses the electric dipoles as intermediaries.

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“…Vibrationally-excited molecules may additionally undergo reactive collisions and other decoherence or loss processes may occur, which, however, are out of the scope of the present study. Non-zero or large electronic spin may be realized with alkaline-earth-metal fluoride molecules in the doublet 2 Σ + electronic state [81], alkalimetal molecules in the triplet 3 Σ + electronic state [82,83], or molecules containing highly-magnetic atom [84,85], respectively. Thus, the considered system may potentially be realized in state-of-the-art experiments on ultracold molecules trapped in optical tweezers [60,61].…”

Section: Experimental Feasibilitymentioning

confidence: 99%

Magnetic properties and quench dynamics of two interacting ultracold molecules in a trap

Dawid,

Tomza

2020

Preprint

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We theoretically investigate the magnetic properties and nonequilibrium dynamics of two interacting ultracold polar and paramagnetic molecules in a one-dimensional harmonic trap in external electric and magnetic fields. The molecules interact via a multichannel two-body contact potential, incorporating the short-range anisotropy of intermolecular interactions. We show that various magnetization states arise from the interplay of the molecular interactions, electronic spins, dipole moments, rotational structures, external fields, and spin-rotation coupling. The rich magnetization diagrams depend primarily on the anisotropy of the intermolecular interaction and the spin-rotation coupling. These specific molecular properties are challenging to calculate or measure. Therefore, we propose the quench dynamics experiments for extracting them from observing the time evolution of the analyzed system. Our results indicate the possibility of controlling the molecular few-body magnetization with the external electric field and pave the way towards studying the magnetization of ultracold molecules trapped in optical tweezers or optical lattices and their application in quantum simulation of molecular multichannel many-body Hamiltonians and quantum information storing.

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Prospects of Forming High-Spin Polar Molecules from Ultracold Atoms

Cited by 12 publications

References 97 publications

Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

Phase diagram and post-quench dynamics in a double spin-chain system in transverse fields

Magnetic properties and quench dynamics of two interacting ultracold molecules in a trap

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