Ferroelectric-superconductor heterostructures in solid state quantum computing systems
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United States of America Patent
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Issued Date -
Dec 5, 2002
app pub date -
May 31, 2001
filing date -
May 31, 2001
priority date (Note) -
Abandoned
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Abstract
A ferroelectric is used to switch a superconductor computer element. Part of the superconductor element can be a high temperature superconductor layer, doped to the vicinity of a superconductor insulator transition. The ferroelectric overlies the superconductor layer, forming a heterostructure. A voltage can be applied to polarize the ferroelectric. This polarization in turn generates an electric field for the superconductor layer, effectively changing its doping. For sufficiently large voltages the superconductor transitions into an insulating state. When included into a sensor, this heterostructure can function as a switch, used in relation to reading the state of qubits. When coupling two qubits, this heterostructure can be used to control the entanglement of the two qubits.
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