qubit – TechConnect Briefs

Tunneling Spectrum of Single-Spin Oscillations

Bulaevskii L.N., Hruska M., Ortiz G., Los Alamos National Laboratory, US

We consider tunneling between electrodes via a microscopic system which can be modeled by the two-level Hamiltonian (a localized spin 1/2 probed by STM or a quantum dot). Measurements of the tunneling current I(t) in [...]

Quantum Computation with Persistent-current Aharonov-Bohm Qubits and Qugates

Kulik I.O., Bilkent University, TR

We propose that Aharonov-Bohm effect can be used for quantum computation. The effect consists of existence of persistent currents in mesoscopic/nanoscopic loops of normal metal or semiconductor in a magnetic field perpendicular to loop. Three-site [...]

Gain in a Semiconductor Waveguide Qubit

Harris J., Akis R., Ferry D.K., Arizona State University, US

Recently, it has been suggested that it may be possible to use combinations of coupled quantum wire waveguides to form quantum computational qubits [1],[2]. However, there are several related problems intrinsic to this approach. First, [...]

Gain in a Semiconductor Waveguide Qubit

Harris J., Akis R., Ferry D.K., Arizona State University, US

Recently, it has been suggested that it may be possible to use combinations of coupled quantum wire waveguides to form quantum computational qubits [1],[2]. However, there are several related problems intrinsic to this approach. First, [...]