Investigation of resonant and transient phenomena in Josephson junction flux qubits
نویسندگان
چکیده
منابع مشابه
Josephson-Junction Qubits: Entanglement and Coherence
Since our previous article, " Quantum Computing with rf SQUIDs " , which appeared about four years ago in The Photon, we have made changes in our primary approach to the use of superconducting elements as qubits. Now we are focusing on single Josephson junctions as qubits, an idea that was suggested by members of our research group. 1 The qubit (quantum bit) of a quantum computer differs from t...
متن کاملSpectroscopy of capacitively coupled Josephson-junction qubits
We show that two capacitively coupled Josephson junctions, in the quantum limit, form a simple coupled qubit system with effective coupling controlled by the junction bias currents. We compute numerically the energy levels and wave functions for the system, and show how these may be tuned to make optimal qubits. The dependence of the energy levels on the parameters can be measured spectroscopic...
متن کاملJosephson Junction Materials Research Using Phase Qubits
At present, the performance of superconducting qubits is limited by decoherence. Strong decoherence of phase qubits is associated with spurious microwave resonators residing within the Josephson junction tunnel barrier [1]. In this work, we investigate three different fabrication techniques for producing tunnel junctions that vary the properties of the superconductor-insulator interface. Throug...
متن کاملLong Josephson junction in a resonant cavity
We present a model to describe an underdamped long Josephson junction coupled to a single-mode electromagnetic cavity, and carry out numerical calculations using this model in various regimes. The coupling may occur through either the electric or the magnetic field of the cavity mode. When a current is injected into the junction, we find that the time-averaged voltage exhibits self-induced reso...
متن کاملDecoherence and dephasing in coupled Josephson-junction qubits
We investigate the decoherence and dephasing of two coupled Josephson qubits. With the interaction between the qubits being generated by current-current correlations, two different situations in which the qubits are coupled to the same bath, or to two independent baths, are considered. Upon focussing on dissipation being caused by the fluctuations of voltage sources, the relaxation and dephasin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2009
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.79.094517