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Towards Chemically Stable Fermionic Ground State Molecules with Strong Dipolar Interactions

Sebastian Will, Jee Woo Park, Cheng-Hsun Wu +2 more

Bulletin of the American Physical SocietyJun 4, 20130 citations

Strongly Dipolar Quantum Gas of Molecules

Siwei Zhang

Oct 6, 20260 citations

Extreme loss suppression in an ultracold molecular gas with widely tunable dipolar interactions

Weijun Yuan, Siwei Zhang, Niccolò Bigagli +5 more

Ultracold dipolar molecules hold great promise for the creation of exotic quantum states of matter, but the realization of long-lived molecular bulk samples with strong dipole-dipole interactions has remained challenging. In this work, we realized a collisionally stable gas of ultracold ground state molecules with a lifetime of several seconds. Utilizing double-microwave dressing, we achieved an extreme suppression of inelastic two- and three-body losses by factors of more than 10,000 and 1000, respectively. We found that losses remained suppressed across a wide range of dipole-dipole interactions, allowing the continuous tuning of the dipolar length from −21,000 to 12,000 a 0 , where a 0 is the Bohr radius. Combined with the recent realization of Bose-Einstein condensation of dipolar molecules, our findings open the door to the exploration of strongly dipolar quantum liquids.Ultracold dipolar molecules hold great promise for the creation of exotic quantum states of matter, but the realization of long-lived molecular bulk samples with strong dipole-dipole interactions has remained challenging. In this work, we realized a collisionally stable gas of ultracold ground state molecules with a lifetime of several seconds. Utilizing double-microwave dressing, we achieved an extreme suppression of inelastic two- and three-body losses by factors of more than 10,000 and 1000, respectively. We found that losses remained suppressed across a wide range of dipole-dipole interactions, allowing the continuous tuning of the dipolar length from −21,000 to 12,000 a 0 , where a 0 is the Bohr radius. Combined with the recent realization of Bose-Einstein condensation of dipolar molecules, our findings open the door to the exploration of strongly dipolar quantum liquids.

ScienceSep 17, 20260 citations

Stabilization of a purely dipolar quantum gas against collapse

Tobias Benedikt Koch, Thierry Lahaye, Jonas Metz +3 more

arXiv:0710.3643Nature PhysicsFeb 24, 2008431 citations

Second-scale nuclear spin coherence time of ultracold 23 Na 40 K molecules

Jee Woo Park, Zoe Z. Yan, Huanqian Loh +2 more

Coherence, the stability of the relative phase between quantum states, is central to quantum mechanics and its applications. For ultracold dipolar molecules at sub-microkelvin temperatures, internal states with robust coherence are predicted to offer rich prospects for quantum many-body physics and quantum information processing. We report the observation of stable coherence between nuclear spin states of ultracold fermionic sodium-potassium (NaK) molecules in the singlet rovibrational ground state. Ramsey spectroscopy reveals coherence times on the scale of 1 second; this enables high-resolution spectroscopy of the molecular gas. Collisional shifts are shown to be absent down to the 100-millihertz level. This work opens the door to the use of molecules as a versatile quantum memory and for precision measurements on dipolar quantum matter.Coherence, the stability of the relative phase between quantum states, is central to quantum mechanics and its applications. For ultracold dipolar molecules at sub-microkelvin temperatures, internal states with robust coherence are predicted to offer rich prospects for quantum many-body physics and quantum information processing. We report the observation of stable coherence between nuclear spin states of ultracold fermionic sodium-potassium (NaK) molecules in the singlet rovibrational ground state. Ramsey spectroscopy reveals coherence times on the scale of 1 second; this enables high-resolution spectroscopy of the molecular gas. Collisional shifts are shown to be absent down to the 100-millihertz level. This work opens the door to the use of molecules as a versatile quantum memory and for precision measurements on dipolar quantum matter.

arXiv:1606.04184ScienceJul 27, 2017134 citations

Coherent Destruction of Tunneling of Dipolar Bosonic Gas

鱼自发, 张爱霞, 薛具奎

Chinese Physics LettersJan 1, 20140 citations

Collisionally stable gas of bosonic dipolar ground-state molecules

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