A molecular superfluid: non-classical rotations in doped para-hydrogen clusters

Abstract

Clusters of para-hydrogen (pH2) have been predicted to exhibit superfluid behavior, but direct observation of this phenomenon has been elusive. Combining experiments and theoretical simulations, we have determined the size evolution of the superfluid response of pH2 clusters doped with carbon dioxide (CO2). Reduction of the effective inertia is observed when the dopant is surrounded by the pH2 solvent. This marks the onset of molecular superfluidity in pH2. The fractional occupation of solvation rings around CO2 correlates with enhanced superfluid response for certain cluster sizes.

References in corpus (4)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Worm Algorithm and Diagrammatic Monte Carlo: A New Approach to Continuous-Space Path Integral Monte Carlo Simulations
• Superfluidity and Quantum Melting of para-Hydrogen clusters
• Structure, superfluidity, and quantum melting of hydrogen clusters

Cited by in corpus (18)

• Microscopic molecular superfluid response: theory and simulations
• A path integral Monte Carlo method for Rényi entanglement entropies
• Particle entanglement in continuum many-body systems via quantum Monte Carlo
• On the possible "supersolid" character of parahydrogen clusters
• Superfluidity of metastable bulk glass para-hydrogen at low temperature
• Search for superfluidity in supercooled liquid parahydrogen
• Superfluid behavior of quasi-1D p-H${}_2$ inside carbon nanotube
• Three-body potential energy surface for parahydrogen
• Equation of State and First Principles Prediction of the Vibrational Matrix Shift of Solid Parahydrogen
• Supersolidity of the $\alpha$ cluster structure in the nucleus ${}^{12}$C
• Superfluid response of parahydrogen clusters in superfluid He-4
• Supersolidity in the second layer of $para$-H${}_2$ adsorbed on graphite
• Neural Network Interaction Potentials for para-Hydrogen with Flexible Molecules
• Computer simulation study of nanoscale size parahydrogen clusters
• Quasi-2D parahydrogen: On the verge of turning superfluid?
• Isotopic separation in mixed clusters of molecular hydrogen
• Exchange-driven self-diffusion of nanoscale crystalline parahydrogen clusters on graphite
• Six-$\alpha$ cluster Bose-Einstein condensation and supersolid ${}^{12}$C($0_2^{+})$+${}^{12}$C($0_2^{+})$ molecular structure in ${}^{24}$Mg