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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Entangled matter waves for quantum enhanced sensing
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Carving entangled multiparticle states with exponentially improved fidelity
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Multiqubit entanglement generation with squeezed modes
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Entanglement and its relation to energy variance for local one-dimensional Hamiltonians
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Tracking the evolution from isolated dimers to many-body entanglement in $\mathrm{NaLu}_x \mathrm{Yb}_{1-x}\mathrm{Se_2}$
Here, we synthesize homogeneous compositions of NaLu x Yb 1-x Se 2 , connecting nonmagnetic NaLuSe 2 to the triangular lattice spin liquid candidate NaYbSe 2 . Thermal and magnetic properties are studied as the system evolves from one with dilute magnetic defects to one of a dense magnetic lattice. The field- and temperature-dependent heat capacity show the carriers of entropy cross over from isolated magnetic ions to a correlated lattice born from spin dimers. For the dilute system we estimate the single-ion anisotropy (g ⟂ /g ∥ =3.13) and also the dimer exchange couplings J ⟂ (=5.4 K) and J ⟂ (=9.6 K), in order to draw comparison to the half-doped and full magnetic compounds.
Quantum phase transitions in a model Hamiltonian exhibiting entangled simultaneous fermion-pair and exciton condensations
Quantum states of a novel Bose-Einstein condensate, in which both fermion-pair and exciton condensations are simultaneously present, have recently been realized theoretically in a model Hamiltonian system. Here, in this study, we identify quantum phase transitions in that model between fermion-pair and exciton condensations based on a geometric analysis of the convex set of ground-state two-particle reduced density matrices (2-RDMs). The 2-RDM set provides a finite representation of the infinite parameter space of Hamiltonians that readily reveals a fermion-pair condensate phase and two distinct exciton condensate phases, as well as the emergence of first- and second-order phase transitions as the particle number of the system is increased. The set, furthermore, shows that the fermion-exciton condensate (FEC) lies along the second-order phase transition between the exciton and fermion-pair condensate phases. The detailed information about the exciton and fermion-pair phases, the forces behind these phases, as well as their associated transitions provides additional insight into the formation of the FEC condensate, which we anticipate will prove useful in its experimental realization.
Observing quasiparticles through the entanglement lens
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Entanglement and topology in Su-Schrieffer-Heeger cavity quantum electrodynamics
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Anyon condensation web and multipartite entanglement in two-dimensional modulated gauge theories
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Entanglement and absorbing-state transitions in interactive quantum dynamics
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Pseudogap phases, chiral anomaly, and topological order with quantum loop entanglement
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Quantum entanglement and quantum geometry measured with inelastic x-ray scattering
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Quantum entanglement in nuclear Cooper-pair tunneling with γ rays
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Novel observables for exploring QCD collective evolution and quantum entanglement within individual jets
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Quantum null energy condition, entanglement wedge nesting, and quantum focusing
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