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The Chiral Qubit: quantum computing with chiral anomaly
Authors
Dmitri E. Kharzeev
Qiang Li
Publication date
21 January 1997
Publisher
View
on
arXiv
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
1
0
4
10^4
1
0
4
. The proposed "Chiral Qubit" is a micron-scale ring made of a Weyl or Dirac semimetal, with the
∣
0
⟩
|0\rangle
∣0
⟩
and
∣
1
⟩
|1\rangle
∣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
⟩
|0\rangle
∣0
⟩
and
∣
1
⟩
|1\rangle
∣1
⟩
quantum states. The entanglement of qubits can be implemented through the near-field THz frequency electromagnetic fields.Comment: 7 pages, 3 figure
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Trinity College
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Trinity College
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