Interference of chiral Andreev edge states
- URL: http://arxiv.org/abs/1907.01722v3
- Date: Fri, 1 Dec 2023 02:46:15 GMT
- Title: Interference of chiral Andreev edge states
- Authors: Lingfei Zhao, Ethan G. Arnault, Alexey Bondarev, Andrew Seredinski,
Trevyn Larson, Anne W. Draelos, Hengming Li, Kenji Watanabe, Takashi
Taniguchi, Fran\c{c}ois Amet, Harold U. Baranger and Gleb Finkelstein
- Abstract summary: We explore an interface between two phases of electrons with conceptually different ground states: the integer quantum Hall insulator and the s-wave superconductor.
We find clear signatures of hybridized electron and hole states similar to chiral Majorana fermions, to which we refer as chiral Andreev edge states (CAES)
Our results demonstrate that these excitations can propagate and interfere over a significant length, opening future possibilities for their coherent manipulation.
- Score: 0.709177079919186
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The search for topological excitations such as Majorana fermions has spurred
interest in the boundaries between distinct quantum states. Here, we explore an
interface between two prototypical phases of electrons with conceptually
different ground states: the integer quantum Hall insulator and the s-wave
superconductor. We find clear signatures of hybridized electron and hole states
similar to chiral Majorana fermions, to which we refer as chiral Andreev edge
states (CAES). They propagate along the interface in the direction determined
by magnetic field and their interference can turn an incoming electron into an
outgoing electron or a hole, depending on the phase accumulated by the CAES
along their path. Our results demonstrate that these excitations can propagate
and interfere over a significant length, opening future possibilities for their
coherent manipulation.
Related papers
- Topological Signatures of Magnetic Phase Transitions with Majorana Fermions through Local Observables and Quantum Information [2.7204116565403744]
The one-dimensional (1D) $J_1-J$ quantum spin model can be viewed as a strong-coupling analogue of the Schrieffer-Su-Heeger model.<n>This model also maps onto a p-wave superconducting wire which shows a topological phase transition with the emergence of low-energy Majorana fermions.<n>This system may be realized in materials and engineered in quantum circuits, optical lattices.
arXiv Detail & Related papers (2025-06-13T12:43:34Z) - Discovery of a topological exciton insulator with tunable momentum order [7.605112731805254]
Topology and correlations are fundamental concepts in modern physics, but their simultaneous occurrence within a single quantum phase is exceptionally rare.
We present the discovery of such a phase of matter in Ta2Pd3Te5, a semimetal where the Coulomb interaction between electrons and holes leads to the formation of excitonic bound states below T=100 K.
Our spectroscopy unveils the development of an insulating gap stemming from the condensation of these excitons, thus giving rise to a highly sought-after correlated quantum phase known as the excitonic insulator.
arXiv Detail & Related papers (2023-12-26T03:05:10Z) - Transport response of topological hinge modes in $\alpha$-Bi$_4$Br$_4$ [15.583792027812775]
We show the first evidence for quantum transport in gapless topological hinge states existing within the insulating bulk and surface energy gaps.
Our findings collectively reveal the quantum transport response of topological hinge modes with both topological nature and quantum coherence.
arXiv Detail & Related papers (2023-12-15T01:52:55Z) - Bound state of distant photons in waveguide quantum electrodynamics [137.6408511310322]
Quantum correlations between distant particles remain enigmatic since the birth of quantum mechanics.
We predict a novel kind of bound quantum state in the simplest one-dimensional setup of two interacting particles in a box.
Such states could be realized in the waveguide quantum electrodynamics platform.
arXiv Detail & Related papers (2023-03-17T09:27:02Z) - Microwave spectroscopy of interacting Andreev spins [0.0]
Andreev bound states are fermionic states localized in weak links between superconductors which can be occupied with spinful quasiparticles.
Here we use a flux-tunable superconducting circuit in external magnetic fields up to 1T to perform spectroscopy of spin-polarized Andreev states up to 250 mT.
We identify singlet and triplet states of two quasiparticles occupying different Andreev states through their dispersion in magnetic field.
arXiv Detail & Related papers (2022-08-23T21:27:10Z) - Tuning long-range fermion-mediated interactions in cold-atom quantum
simulators [68.8204255655161]
Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior.
Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
arXiv Detail & Related papers (2022-03-31T13:32:12Z) - Cavity-mediated electron hopping in disordered quantum Hall systems [0.0]
We show that the counter-rotating (anti-resonant) light-matter interaction produces an effective hopping between disordered eigenstates within the last occupied Landau band.
We study such a cavity-mediated hopping mechanism in the dual presence of a random disordered potential.
arXiv Detail & Related papers (2021-07-20T12:12:08Z) - Relativistic aspects of orbital and magnetic anisotropies in the
chemical bonding and structure of lanthanide molecules [60.17174832243075]
We study the electronic and ro-vibrational states of heavy homonuclear lanthanide Er2 and Tm2 molecules by applying state-of-the-art relativistic methods.
We were able to obtain reliable spin-orbit and correlation-induced splittings between the 91 Er2 and 36 Tm2 electronic potentials dissociating to two ground-state atoms.
arXiv Detail & Related papers (2021-07-06T15:34:00Z) - Quantum chaos driven by long-range waveguide-mediated interactions [125.99533416395765]
We study theoretically quantum states of a pair of photons interacting with a finite periodic array of two-level atoms in a waveguide.
Our calculation reveals two-polariton eigenstates that have a highly irregular wave-function in real space.
arXiv Detail & Related papers (2020-11-24T07:06:36Z) - Generation, Characterization and Manipulation of Quantum Correlations in
Electron Beams [0.0]
Entanglement engineering plays a central role in quantum-enhanced technologies.
However, free electrons remain largely unexplored despite their great capacity to encode and manipulate quantum information.
arXiv Detail & Related papers (2020-07-23T16:55:39Z) - Quantum coherent spin-electric control in a molecular nanomagnet at
clock transitions [57.50861918173065]
Electrical control of spins at the nanoscale offers architectural advantages in spintronics.
Recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising.
E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings.
arXiv Detail & Related papers (2020-05-03T09:27:31Z) - Quantum decoherence by Coulomb interaction [58.720142291102135]
We present an experimental study of the Coulomb-induced decoherence of free electrons in a superposition state in a biprism electron interferometer close to a semiconducting and metallic surface.
The results will enable the determination and minimization of specific decoherence channels in the design of novel quantum instruments.
arXiv Detail & Related papers (2020-01-17T04:11:44Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.