Observation of flux qubit states with the help of a superconducting differential double contour interferometer
arXiv:1909.09460 · doi:10.1016/j.physleta.2019.125979
Abstract
The quantum states of flux qubit is suggested to observe with the help of a new device, the superconducting differential double contour interferometer (DDCI). The flux qubit and the superconducting quantum interference device (DC-SQUID) are connected in the DDCI through the phase of the wave function rather than through magnetic flux. The critical current of DC-SQUID should change to the maximum value at the change of the flux qubit state thanks to this phase coupling. A large jump in the critical current and voltage enables to observe continuously the change in time the state of the flux qubit. This observation can have fundamental importance for the investigation of the superposition of macroscopic quantum states.
arXiv comment7 pages, 1 figure. A version of this article will be published in Phys. Lett. A
References in corpus (15)
- Coherent Quantum Dynamics of a Superconducting Flux Qubit
- Quantum information processing with superconducting circuits: a review
- Superconducting qubit-oscillator circuit beyond the ultrastrong-coupling regime
- Leggett-Garg Inequalities
- A strict experimental test of macroscopic realism in a superconducting flux qubit
- A survey of classical and quantum interpretations of experiments on Josephson junctions at very low temperatures
- Macroscopic quantum tunneling in spin filter ferromagnetic Josephson junctions
- Multiple flux jumps and irreversible behavior of thin Al superconducting rings
- Evidence of two-dimensional macroscopic quantum tunneling of a current-biased DC-SQUID
- Superconducting quantum interference device without Josephson junctions
- Quantum periodicity in the critical current of superconducting rings with asymmetric link-up of current leads
- A development of superconducting differential double contour interferometer
- Fluxoid fluctuations in mesoscopic superconducting rings
- Superconducting qubit in a nonstationary transmission line cavity: parametric excitation, periodic pumping, and energy dissipation
- Macroscopic quantum oscillator based on a flux qubit