Ramsey-biased spectroscopy of superconducting qubits under dispersion
arXiv:2004.08188 · doi:10.1103/PhysRevA.102.013710
Abstract
We proposed a spectroscopic method that extends Ramsey's atomic spectroscopy to detect the transition frequency of a qubit fabricated on a superconducting circuit. The method uses a multi-interval train of qubit biases to implement an alternate resonant and dispersive couplings to an incident probe field. The consequent absorption spectrum of the qubit has a narrower linewidth at its transition frequency than that obtained from constantly biasing the qubit to resonance while the middle dispersive evolution incurs only a negligible shift in detected frequency. Modeling on transmon qubits, we find that the linewidth reduction reaches 23% and Ramsey fringes are simultaneously suppressed at extreme duration ratio of dispersion over resonance for a double-resonance scheme. If the scheme is augmented by an extra resonance segment, a further 37% reduction can be achieved.
References in corpus (20)
- Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
- Charge insensitive qubit design derived from the Cooper pair box
- Coupling Superconducting Qubits via a Cavity Bus
- Coherent Quantum Dynamics of a Superconducting Flux Qubit
- Superconducting Circuits and Quantum Information
- A Superconducting Persistent Current Qubit
- Resonance Fluorescence of a Single Artificial Atom
- Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
- Dressed Collective Qubit States and the Tavis-Cummings Model in Circuit QED
- Input-output theory for waveguide QED with an ensemble of inhomogeneous atoms
- Two-Qubit State Tomography using a Joint Dispersive Read-Out
- Rotating-frame relaxation as a noise spectrum analyzer of a superconducting qubit undergoing driven evolution
- Spectroscopy of low-frequency noise and its temperature dependence in a superconducting qubit
- Ramsey's Method of Separated Oscillating Fields and its Application to Gravitationally Induced Quantum Phaseshifts
- Large collective Lamb shift of two distant superconducting artificial atoms
- Reflective amplification without population inversion from a strongly driven superconducting qubit
- Resonant excitations of single and two-qubit systems coupled to a tank circuit
- Generalized Hyper-Ramsey Resonance with separated oscillating fields
- Locking Local Oscillator Phase to the Atomic Phase via Weak Measurement
- Generalized Ramsey Interferometry Explored with a Single Nuclear Spin Qudit