Chemical reactions typically proceed via stochastic encounters between reactants. Going beyond this paradigm, we combine exactly two atoms into a single, controlled reaction. The experimental apparatus traps individual laser-cooled (one sodium and one cesium) in separate optical tweezers then merges them dipole trap. Subsequently, photoassociation forms an excited-state NaCs molecule. discovery of previously unseen resonances near the molecular dissociation threshold measurement collision...

We demonstrate the coherent creation of a single NaCs molecule in its rotational, vibrational, and electronic (rovibronic) ground state an optical tweezer. Starting with weakly bound Feshbach molecule, we locate two-photon transition via |c3Σ1,v′=26⟩ excited drive Rabi oscillations between hyperfine level rovibronic |X1Σ,v′′=0,N′′=0⟩ binding energy D0=h×147044.63(11) GHz. measure lifetime 3.4±1.6 s for which possesses large molecule-frame dipole moment 4.6D occupies predominantly motional...

Abstract Fully internal and motional state controlled individually manipulable polar molecules are desirable for many quantum science applications leveraging the rich space intrinsic interactions of molecules. While prior efforts at assembling from their constituent atoms trapped in optical tweezers achieved such a goal exactly one molecule (Zhang J T et al 2020 Phys. Rev. Lett. 124 253401; Cairncross W B 2021 126 123402; He X Science 370 331–5), here we extend technique to an array five...

We demonstrate the formation of a single NaCs molecule in an optical tweezer by magnetoassociation through s-wave Feshbach resonance at 864.11(5)G. Starting from atoms cooled to their motional ground states, we achieve conversion efficiencies 47(1)%, and measure molecular lifetime 4.7(7)ms. By construction, molecules are predominantly (77(5)%) center-of-mass state tweezer. Furthermore, produce p-wave near 807G first preparing one with quantum excitation. Our creation weakly bound designated...

We report Raman sideband cooling of a single sodium atom to its three-dimensional motional ground state in an optical tweezer. Despite large Lamb-Dicke parameter, high initial temperature, and differential light shifts between the excited state, we achieve ground-state population 93.5(7)% after 53 ms cooling. Our technique includes addressing high-order sidebands, where several quanta are removed by laser pulse, fast modulation tweezer intensity. demonstrate that is possible, even without...

We demonstrate full quantum state control of two species single atoms using optical tweezers and assemble the into a molecule. Our demonstration includes 3D ground-state cooling atom (Cs) in an tweezer, transport by several microns with minimal heating, merging Na atom. Subsequently, both occupy simultaneous motional ground 61(4)% probability. This realizes sample exactly cotrapped near phase-space-density limit one, allows for efficient stimulated-Raman transfer pair molecular bound triplet...

We report on photoassociation spectroscopy probing the ${c}^{3}{\mathrm{\ensuremath{\Sigma}}}_{1}^{+}$ potential of bialkali NaCs molecule, identifying 11 vibrational lines between ${v}^{\ensuremath{'}}=0$ and ${v}^{\ensuremath{'}}=25$ excited fitting their rotational hyperfine structure. The observed are assigned by to an effective Hamiltonian model excited-state structure with constants as free parameters. discuss unexpected broadening select its possible link strong spin-orbit coupling...

Abstract Photonic interconnects between quantum processing nodes are likely the only way to achieve large-scale computers and networks. The bottleneck in such an architecture is interface well-isolated memories flying photons. We establish high-fidelity entanglement remotely separated trapped atomic qubit memories, mediated by photonic qubits stored timing of their pulses. Such time-bin encoding removes sensitivity polarization errors, enables long-distance communication, extensible with...

The authors present a new technique for characterizing the scattering and Feshbach resonances of two different species atoms. A single ultracold Na Cs atom are trapped in same optical tweezer cooled to ground state. interactions atoms modify their motional trapping frequencies, which measured spectroscopically used characterize properties.

We report coherent association of atoms into a single weakly bound NaCs molecule in an optical tweezer through Raman transition. The technique uses deeply electronic excited intermediate state to achieve large transition dipole moment while reducing photon scattering. Starting from two their relative motional ground state, we transfer efficiency 69%. molecules have binding energy 770.2 MHz at 8.83(2) G. This does not rely on Feshbach resonances or narrow excited-state lines and may allow...

Different regimes of collective light scattering are observed when an elongated Bose-Einstein condensate is pumped by two noninterfering beams counterpropagating along its long axis. In the limit small Rayleigh rates, presence a second pump beam suppresses superradiance, whereas at large rates it lowers effective threshold power for scattering. latter regime, quench dynamics two-beam system oscillatory, compared to monotonic in single-beam case. addition, dependence on power, detuning, and...

Microscopically controlled neutral atoms in optical tweezers and lattices have led to exciting advances the study of quantum information many-body systems. The light shifts atomic levels from trapping potential these systems can result detrimental effects such as fluctuating dipole force heating, inhomogeneous detunings, inhibition laser cooling, which limits species that be manipulated. In particular, large enough prevent loading into directly a magneto-optical trap. We implement general...

Chemical reactions can be surprisingly efficient at ultracold temperatures ( < 1mK) due to the wave nature of atoms and molecules. The study in regime is a new research frontier enabled by cooling trapping techniques developed atomic molecular physics. In addition, gases that offer diverse internal states large electric dipolar interactions are sought after for studies strongly interacting many-body quantum Here we propose approach producing molecules absolute motional ground state, where...

In this work we discuss the progress of commissioning next-generation trapped-ion quantum computing system. Heating rates, coherence times, background gas collision individual-addressing cross-talk and other factors contributing to gate fidelity are discussed.

Photonic interconnects between quantum processing nodes are likely the only way to achieve large-scale computers and networks. The bottleneck in such an architecture is interface well-isolated memories flying photons. We establish high-fidelity entanglement remotely separated trapped atomic qubit memories, mediated by photonic qubits stored timing of their pulses. Such time-bin encoding removes sensitivity polarization errors, enables long-distance communication, extensible with more than...

<title>Abstract</title> Photonic interconnects between quantum processing nodes are likely the only way to achieve large-scale computers and networks (1). The bottleneck in such an architecture is interface well-isolated memories flying photons. We establish high-fidelity entanglement remotely separated trapped atomic qubit (2–4), mediated by photonic qubits stored timing of their pulses (5). Such time-bin encoding removes sensitivity polarization errors, enables long-distance communication,...

Fully internal and motional state controlled individually manipulable polar molecules are desirable for many quantum science applications leveraging the rich space intrinsic interactions of molecules. While prior efforts at assembling from their constituent atoms trapped in optical tweezers achieved such a goal exactly one molecule, here we extend technique to an array five molecules, unlocking ability study molecular interactions. We detail technical challenges solutions inherent scaling...