6 papers
Field-Free Transverse Aharonov--Bohm Phase Gate for an Orbital -Qubit
Ju Gao, Fang Shen
The Aharonov--Bohm (AB) effect is usually read out through phase differences associated with spatially distinct electron paths. We show that confined orbital modes provide a same-p…
Heliciton-Assisted Chirality-Induced Spin Selectivity from Helical Dirac Current
Ju Gao, Fang Shen
We develop a quantized screw-mode mechanism for chirality-induced spin selectivity (CISS). The corresponding quantum, termed a heliciton, is a screw-symmetric environmental excitat…
Helical Dirac Current with Local Coupling to a Chiral Potential
Ju Gao, Fang Shen
We show that a propagating electron wave in the lowest cylindrical channel carries a spin-resolved helical conserved current, and connect this current texture to its local chiral c…
Separation-Dependent Bell Correlations from Prepared Coherence in Dirac Wavepackets
Ju Gao, Fang Shen
We calculate separation-dependent Bell correlations for a fixed pair of Dirac electron wavepackets in a free, weakly relativistic packet model, treating the prepared joint wave as…
Electron wave spin in a cavity
Ju Gao, Fang Shen
Our study reveals electron spin in a cavity as a stable circulating current density, characterized by a torus topology. This current density circulates concentrically beyond the ca…
Electron Wave Spin in Excited States
Ju Gao, Fang Shen
The wave spin of an electron can be fully characterized by the current density calculated from the exact four-spinor solution of the Dirac equation. In the excited states of the el…