The Chiral Qubit: quantum computing with chiral anomaly

Abstract

The quantum chiral anomaly enables a nearly dissipationless current in the presence of chirality imbalance and magnetic field -- this is the Chiral Magnetic Effect (CME), observed recently in Dirac and Weyl semimetals. Here we propose to utilize the CME for the design of qubits potentially capable of operating at THz frequency, room temperature, and the coherence time to gate time ratio of about $10^4$. The proposed "Chiral Qubit" is a micron-scale ring made of a Weyl or Dirac semimetal, with the $|0⟩$ and $|1⟩$ quantum states corresponding to the symmetric and antisymmetric superpositions of quantum states describing chiral fermions circulating along the ring clockwise and counter-clockwise. A fractional magnetic flux through the ring induces a quantum superposition of the $|0⟩$ and $|1⟩$ quantum states. The entanglement of qubits can be implemented through the near-field THz frequency electromagnetic fields.

7 pages, 3 figures

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Cited by in corpus (8)

• Thermal transport, geometry, and anomalies
• Foundations and Applications of Quantum Kinetic Theory
• Structural and electronic properties of the pure and stable elemental 3D topological Dirac semimetal $\alpha$-Sn
• Evidence of Ba substitution induced spin-canting in the magnetic Weyl semimetal EuCd${}_2$As${}_2$
• How massless are Weyl fermions in Weyl semimetals?
• Robust and tunable Weyl phases by coherent infrared phonons in ZrTe${}_5$
• Recent developments in chiral and spin polarization effects in heavy-ion collisions
• Three-dimensional chiral Veselago lensing