Fragmented-condensate solid of dipolar excitons

Abstract

We discuss a possible link between the recently observed macroscopic ordering of ultra cold dipolar excitons (MOES) and the phenomenon of supersolidity. In the dilute limit we predict a stable supersolid state for a quasi-one-dimensional system of bosonic dipoles characterized by two- and three-body contact repulsion. We phenomenologically extend our theory to the strongly-correlated regime and find a critical value of the contact interaction parameter at which the supersolid exhibits a quantum phase transition to a fragmented state. The wavelength of the fragmented-condensate solid is defined by the balance between the quantum pressure and the entropy due to fluctuations of the relative phases between the fragments. Our model appears to be in good agreement with the relevant experimental data, including the very recent results on commensurability effect and wavelength of the MOES.

arXiv comment16 pages, 5 figures

References in corpus (44)

• Feshbach Resonances in Ultracold Gases
• Atomic Scattering in Presence of an External Confinement and a Gas of Impenetrable Bosons
• Bragg spectroscopy of a Bose-Einstein condensate
• Roton-maxon spectrum and stability of trapped dipolar condensates
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Macroscopically ordered state in exciton system
• Three-dimensional Roton-Excitations and Supersolid formation in Rydberg-excited Bose-Einstein Condensates
• Controlling the quantum stereodynamics of ultracold bimolecular reactions
• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Subwavelength vacuum lattices and atom-atom interactions in photonic crystals
• Spontaneous Coherence in a Cold Exciton Gas
• Observation of Heteronuclear Feshbach Resonances in a Bose-Fermi Mixture
• Josephson effect between trapped Bose-Einstein condensates
• Ultracold dense gas of deeply bound heteronuclear molecules
• A superfluid-droplet crystal and a free-space supersolid in a dipole-blockaded gas
• Bose-Einstein Condensation of Long-Lifetime Polaritons in Thermal Equilibrium
• Analysis of the exciton-exciton interaction in semiconductor quantum wells
• Order Parameter at the Boundary of a Trapped Bose Gas
• Dipolar gases in quasi one-dimensional geometries
• Thermal vs quantum decoherence in double well trapped Bose-Einstein condensates
• Bose-Einstein condensation into non-equilibrium states studied by condensate focusing
• Stable dilute supersolid of two-dimensional dipolar bosons
• Three-Body Interacting Bosons in Free Space
• Spin Texture in a Cold Exciton Gas
• Spin currents in a coherent exciton gas
• Topological p_x+ip_y Superfluid Phase of Fermionic Polar Molecules
• Bilayer superfluidity of fermionic polar molecules: many body effects
• Structure formation during the collapse of a dipolar atomic Bose-Einstein condensate
• Two-dimensional scattering and bound states of polar molecules in bilayers
• Vortex lattices in Bose-Einstein condensates with Dipolar Interactions Beyond the Weak Interaction Limit
• Phase diagram of soft-core bosons in two dimensions
• Pattern Formation as a Signature of Quantum Degeneracy in a Cold Exciton System
• Pattern formation of indirect excitons in coupled quantum wells
• The Interaction in the Macroscopically Ordered Exciton State
• Thermodynamic model of the macroscopically ordered exciton state
• On the microscopic theory of the exciton ring fragmentation
• Drift-diffusion model of the fragmentation of the external ring structure in the photoluminescence pattern of indirect excitons in coupled quantum wells
• Bose-Einstein supersolid phase for a novel type of momentum dependent interaction
• Josephson oscillations between exciton condensates in electrostatic traps
• Fluctuation and Commensurability Effect of Exciton Density Wave
• Scale invariance and universality in a cold gas of indirect excitons
• Resonant Pairing of Excitons in Semiconductor Heterostructures
• Autolocalization in a dipolar exciton system
• Classification of a supersolid: Trial wavefunctions, Symmetry breakings and Excitation spectra

Cited by in corpus (18)

• Effective interactions in a quantum Bose-Bose mixture
• Chester supersolid of spatially indirect excitons in double-layer semiconductor heterostructures
• Sound, superfluidity and layer compressibility in a ring dipolar supersolid
• Discrete Polynomial Optimization with Coherent Networks of Condensates and Complex Coupling Switching
• Quasi-condensation of bilayer excitons in a periodic potential
• Supersolid formation in a dipolar condensate by roton instability
• Supersolid behavior in one-dimensional self-trapped Bose-Einstein condensate
• Supersolid-like states in a two-dimensional trapped spin-orbit-coupled spin-1 condensate
• Dipolar polaritons squeezed at unitarity
• Transition to a supersolid phase in a two-dimensional dilute gas of electron-hole pairs
• Spin-orbit coupled depairing of a dipolar biexciton superfluid
• Magnetoroton in a two-dimensional Bose-Bose mixture
• Striped excitonic (super)solid in anisotropic semiconductors with screened exciton interactions
• Nonuniform Bose-Einstein condensate. II. Doubly coherent states
• Self-localization of magnons and magnetoroton in a binary Bose-Einstein condensate
• Exact crystalline solution for a one-dimensional few-boson system with point interaction
• Symmetry properties of the ground state of the system of interacting spinless bosons
• Dynamic formation of supersolid phase in a mixture of ultracold bosonic and fermionic atoms