Numerical simulation of leakage effect for quantum NOT operation on three-Josephson-junction flux qubit
arXiv:cond-mat/0511012 · doi:10.1088/0256-307X/23/4/058
Abstract
Superconducting flux qubits with three Josephson junctions are promising candidates for the building blocks of a quantum computer. We have applied the imaginary time evolution method to study the model of this qubit accurately by calculating its wave functions and eigenenergies. Because such qubits are manipulated with magnetic flux microwave pulses they might be irradiated into non-computational states which is called the leakage effect. Through the evolution of the density matrix of the qubit under either hard-shaped pulse or Gaussian-shaped pulse to carry out quantum NOT operation, we show that the leakage effect is not a serious problem for a flux qubit.
6pages, 3figures; accepted by Chinese Physics Letters
References in corpus (9)
- Quantum state engineering with Josephson-junction devices
- Manipulating the Quantum State of an Electrical Circuit
- Coherent Quantum Dynamics of a Superconducting Flux Qubit
- A Superconducting Persistent Current Qubit
- Fast two-bit operations in inductively coupled flux qubits
- Low-frequency characterization of quantum tunneling in flux qubits
- Spectroscopy of capacitively coupled Josephson-junction qubits
- Method for direct observation of coherent quantum oscillations in a superconducting phase qubit
- Method for direct observation of coherent quantum oscillations in a superconducting phase qubit. Computer simulations