Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1546129 | Physica E: Low-dimensional Systems and Nanostructures | 2008 | 5 Pages |
Abstract
We present a simple but feasible quantum computing scheme in decoherence-free subspace by coupling four identical superconducting Josephson circuits. Two physical charge qubits are encoded to a logical one by connecting them with a common superconducting quantum interference device (SQUID). Well-controllable coupling between two logic qubits is further proposed by using a variable electrostatic transformer to construct the two-qubits controlled-phase gate. Taking into account the symmetry of system-bath interaction, our scheme may be helpful to suppress collective noises.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Zhi-Bo Feng, Xin-Ding Zhang,