Magnetic Qubits as Hardware for Quantum Computers
By Javier Tejada, E. Chudnovsky, E. Barco, J. Hernàndez, T. Spiller. 2000
273 citations recorded by the source corpus.
We propose two potential realizations for quantum bits based on nanometre-scale magnetic particles of large spin S and high-anisotropy molecular clusters. In case (1) the bit-value basis states |0 and |1 are the ground and first excited spin states Sz = S and S-1, separated by an energy gap given by the ferromagnetic resonance frequency. In case (2), when there is significant tunnelling through the anisotropy barrier, the qubit states correspond to the symmetric, |0, and antisymmetric, |1, combinations of the twofold degenerate ground state Sz = ±S. In each case the temperature of operation must be low compared to the energy gap, Δ, between the states |0 and |1. The gap Δ in case (2) can be controlled with an external magnetic field perpendicular to the easy axis of the molecular cluster. The states of different molecular clusters and magnetic particles may be entangled by connecting them by superconducting lines with Josephson switches, leading to the potential for quantum computing hardware.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/738cc513175dc5bbd10fd01bf747d8124e4c4551
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Nano Superconducting Quantum Interference device: a powerful tool for nanoscale investigations (2015, background): “stacle to develop suitable memory device was the poor scale integration of the single cell memory, which had a size of some tens of µm. Exploiting the submicron size of nanoSQUIDs, Lam and Gnanarajan [278] proposed them as trapped-vortex memory device with the potentiality for high-density structure”