Method for direct observation of coherent quantum oscillations in a superconducting phase qubit. Computer simulations

Abstract

Time-domain observations of coherent oscillations between quantum states in mesoscopic superconducting systems have so far been restricted to restoring the time-dependent probability distribution from the readout statistics. We propose a method for direct observation of Rabi oscillations in a phase qubit. The external source, typically in GHz range, induces transitions between the qubit levels. The resulting Rabi oscillations of supercurrent in the qubit loop are detected by a high quality resonant tank circuit, inductively coupled to the phase qubit. Here we present the results of detailed computer simulations of the interaction of a classical object (resonant tank circuit) with a quantum object (phase qubit). We explicitly account for the back action of a tank circuit and for the unpredictable nature of outcome of a single measurement. According to the results of our simulations the Rabi oscillations in MHz range can be detected using conventional NMR pulse Fourier technique.

References in corpus (4)

• Manipulating the Quantum State of an Electrical Circuit
• Relaxation and Zeno effect in qubit measurements
• Low-frequency characterization of quantum tunneling in flux qubits
• Method for direct observation of coherent quantum oscillations in a superconducting phase qubit

Cited by in corpus (4)

• Effects of counterrotating interaction on driven tunneling dynamics: coherent destruction of tunneling and Bloch-Siegert shift
• Bias-modulated dynamics of a strongly driven two-level system
• Two-level systems: exact solutions and underlying pseudo-supersymmetry
• Numerical simulation of leakage effect for quantum NOT operation on three-Josephson-junction flux qubit