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  1. 2841
    por Dick, Rainer
    Publicado 2012
    “…On one hand, we discuss the impact of thermodynamics in one or two dimensions on the behavior of fermions in low-dimensional systems. On the other hand, we use both quantum wells and interfaces with different effective electron or hole mass to study the question when charge carriers in interfaces or layers exhibit two-dimensional or three-dimensional behavior. …”
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    Inter-dimensional effects in nano-structures
  2. 2842
    “…By combining the Bravyi-Kitaev construction to map fermions to qubits with perturbative gadgets to reduce the Hamiltonian to 2-body, we obtain precision requirements on the coupling strengths and a number of ancilla qubits that scale polynomially in the problem size. …”
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    Adiabatic Quantum Simulation of Quantum Chemistry
  3. 2843
    “…Giant resonances are collective excitation modes for many-body systems of fermions governed by a mean field, such as the atomic nuclei. …”
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    Signatures of the Giant Pairing Vibration in the (14)C and (15)C atomic nuclei
  4. 2844
    “…Here, we report the observation of the LLs of massive Dirac fermions on atomically flat areas of a nitrogen-doped graphite surface in the absence of external magnetic fields. …”
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    Observation of Landau levels on nitrogen-doped flat graphite surfaces without external magnetic fields
  5. 2845
    “…Such ideal Weyl semimetals could further provide a unique platform to study emergent phenomena such as the interplay between ideal Weyl fermions and superconductivity in the half-Heusler compound LaPtBi.…”
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    Symmetry-protected ideal Weyl semimetal in HgTe-class materials
  6. 2846
    por Alattas, M., Schwingenschlögl, U.
    Publicado 2016
    “…We find that Cs intercalation restores the linear dispersion characteristic of Dirac fermions, which agrees with experiments, but the Dirac cone is shifted to lower energy, i.e., the graphene sheet is n-doped. …”
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    Quasi-freestanding graphene on Ni(111) by Cs intercalation
  7. 2847
    “…Density functional calculations find that TaAs(2) is a new topological semimetal [ℤ(2) invariant (0;111)] without Dirac dispersion, demonstrating that a negative magnetoresistance in non-magnetic semimetals cannot be attributed uniquely to the Adler-Bell-Jackiw chiral anomaly of bulk Dirac/Weyl fermions.…”
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    Anomalous electronic structure and magnetoresistance in TaAs(2)
  8. 2848
    “…Transition metal dichalcogenide MoTe(2) is an important candidate for realizing the newly predicted type-II Weyl fermions, for which the breaking of the inversion symmetry is a prerequisite. …”
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    Raman signatures of inversion symmetry breaking and structural phase transition in type-II Weyl semimetal MoTe(2)
  9. 2849
    por Bighin, G., Salasnich, L.
    Publicado 2017
    “…Very recent experiments with two-dimensional superfluid fermions motivate the present work: we present theoretical results based on the renormalization group showing that the universal jump of the superfluid density and the critical temperature crucially depend on the interaction strength, providing a strong benchmark for forthcoming investigations.…”
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    Vortices and antivortices in two-dimensional ultracold Fermi gases
  10. 2850
    “…Interacting bosons or fermions give rise to some of the most fascinating phases of matter, including high-temperature superconductivity, the fractional quantum Hall effect, quantum spin liquids and Mott insulators. …”
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    Optimal free descriptions of many-body theories
  11. 2851
    “…A three times increase in the cold atoms population is obtained with contact-less pulsed light-induced desorption, applied to different isotopes, either bosonic or fermionic, of Francium. A six times increase of (210)Fr population is obtained with a desorption mechanism based on direct charge transfer from a triboelectric probe to the adatom-organic coating complex. …”
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    Enhanced Atomic Desorption of 209 and 210 Francium from Organic Coating
  12. 2852
    “…When electron-hole pairs are excited in a semiconductor, it is a priori not clear if they form a plasma of unbound fermionic particles or a gas of composite bosons called excitons. …”
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    Exciton fission in monolayer transition metal dichalcogenide semiconductors
  13. 2853
    por McOrist, Jock
    Publicado 2017
    “…In particular, we compute the contribution of the matter sector to the Kähler potential and derive the Yukawa couplings and other quadratic fermionic couplings. From this we write down a Kähler potential [Image: see text] and superpotential [Image: see text].…”
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    On the effective field theory of heterotic vacua
  14. 2854
    “…Here, we use an all-optical quantum system that simulates the statistical evolution of Majorana fermions. As a result, we experimentally realize non-Abelian Berry phases with the topological characteristic that they are invariant under continuous deformations of their control parameters. …”
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    Photonic implementation of Majorana-based Berry phases
  15. 2855
    por Yu, You-Zhong, Chern, Ruey-Lin
    Publicado 2018
    “…In particular, the combined Hamiltonian of the hybrid modes complies with a fermionic-like pseudo time-reversal symmetry that ensures the Kramers degeneracy, leading to the topological protection of helical edge states. …”
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    Photonic topological phases in dispersive metamaterials
  16. 2856
    “…The surface of a three-dimensional topological insulator (TI) hosts two-dimensional massless Dirac fermions (DFs), the gapless and spin-helical nature of which leads to their high transmission through surface defects or potential barriers. …”
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    Selective trapping of hexagonally warped topological surface states in a triangular quantum corral
  17. 2857
    “…Weyl fermions as emergent quasiparticles can arise in Weyl semimetals (WSMs) in which the energy bands are nondegenerate, resulting from inversion or time-reversal symmetry breaking. …”
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    Spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd(2)As(2)
  18. 2858
    “…The crossover from the superconductivity of the Bardeen-Cooper-Schrieffer (BCS) regime to the Bose-Einstein condensation (BEC) regime holds a key to understanding the nature of pairing and condensation of fermions. It has been mainly studied in ultracold atoms, but in solid systems, fundamentally previously unknown insights may be obtained because multiple energy bands and coexisting electronic orders strongly affect spin and orbital degrees of freedom. …”
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    Bose-Einstein condensation superconductivity induced by disappearance of the nematic state
  19. 2859
    “…We find that the protocol allows for efficient two-excitation routing on a fermionic network, although for a spin- [Formula: see text] network only a limited region of the network is suitable for high-quality routing.…”
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    Two-Excitation Routing via Linear Quantum Channels
  20. 2860
    “…This is ultimately related to the elastic scattering amplitude for the fermionic excitations evaluated at different injection energies. …”
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    Electronic Wave-Packets in Integer Quantum Hall Edge Channels: Relaxation and Dissipative Effects
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