Shunting an Andreev spin qubit with a linear inductor separates its two spin states into distinct phase-space wells, exponentially suppressing wavefunction overlap and enhancing predicted relaxation times by orders of magnitude.
Loopless multiterminal quantum circuits at odd parity
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
We theoretically investigate loopless multiterminal hybrid superconducting devices at odd fermion parity with time-reversal symmetry. We find that the energy-phase relationship has a double minimum corresponding to opposite windings of the superconducting phases. Spin-orbit coupling adds multi-axial spin splittings, which contrasts with two-terminal devices where spin dependence is uniaxial. Capacitive shunting localizes quantum circuit states in the wells and exponentially suppresses their splitting. For weak spin-orbit strength, the system has a four-dimensional spin-chirality low-energy subspace which can be universally controlled with electric fields only.
citation-role summary
background 1
citation-polarity summary
fields
cond-mat.mes-hall 1years
2026 1verdicts
CONDITIONAL 1roles
background 1polarities
unclear 1representative citing papers
citing papers explorer
-
Inductively-protected Andreev (IPA) spin qubit
Shunting an Andreev spin qubit with a linear inductor separates its two spin states into distinct phase-space wells, exponentially suppressing wavefunction overlap and enhancing predicted relaxation times by orders of magnitude.