Physics – Condensed Matter – Superconductivity
Scientific paper
2011-11-28
Physics
Condensed Matter
Superconductivity
7 pages, 5 figures, in v.2: corrected typos, some clarifying additions to the text, improved figures readability
Scientific paper
Superconducting quantum coherent circuits have opened up a novel area of fundamental low temperature science since they could potentially be the element base for future quantum computers. Here we report a quasi-3-level coherent system, so called superconducting qutrit, which has some advantages over 2-level information cell (qubit), and based on the qutrit readout circuit intended to measure individually states of each qubit in the quantum computer. Designed and implemented superconducting qutrit detector (SQUTRID) with ScS junction utilizes the coherent state superposition in 3-well potential with energy splitting Delta_E_01/k_B=1.5 K at 30-th quantized energy level with good isolation from the electromagnetic environment. The reason why larger values of Delta_E_01 (and ScS type of Josephson junction) are required is to make use of the adiabatic limit while considering quantum dynamics of magnetic flux in the SQUTRID.
Shnyrkov V. I.
Soroka A. A.
Turutanov O. G.
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