Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
arXiv:0712.3581 · doi:10.1103/PhysRevB.77.180502
Abstract
We present an experimental realization of the transmon qubit, an improved superconducting charge qubit derived from the Cooper pair box. We experimentally verify the predicted exponential suppression of sensitivity to 1/f charge noise [J. Koch et al., Phys. Rev. A 76, 042319 (2007)]. This removes the leading source of dephasing in charge qubits, resulting in homogenously broadened transitions with relaxation and dephasing times in the microsecond range. Our systematic characterization of the qubit spectrum, anharmonicity, and charge dispersion shows excellent agreement with theory, rendering the transmon a promising qubit for future steps towards solid-state quantum information processing.
4+ pages, 4 figures
References in corpus (9)
- Charge insensitive qubit design derived from the Cooper pair box
- Coupling Superconducting Qubits via a Cavity Bus
- Superconducting Circuits and Quantum Information
- Resolving photon number states in a superconducting circuit
- Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
- AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
- Generating Single Microwave Photons in a Circuit
- Decoherence of flux qubits due to 1/f flux noise
- Kinetics of the superconducting charge qubit in the presence of a quasiparticle
Cited by in corpus (24)
- Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
- Simple pulses for elimination of leakage in weakly nonlinear qubits
- Climbing the Jaynes-Cummings Ladder and Observing its Sqrt(n) Nonlinearity in a Cavity QED System
- Controlling the spontaneous emission of a superconducting transmon qubit
- Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics
- Dispersive regime of circuit QED: photon-dependent qubit dephasing and relaxation rates
- Nonlinear response of the vacuum Rabi resonance
- Ultrastrong coupling regime of cavity QED with phase-biased flux qubits
- Randomized benchmarking and process tomography for gate errors in a solid-state qubit
- Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
- Two-Qubit State Tomography using a Joint Dispersive Read-Out
- Two-resonator circuit QED: A superconducting quantum switch
- Life after charge noise: recent results with transmon qubits
- Non-linear dispersive regime of cavity QED: The dressed dephasing model
- Dynamics of dispersive single qubit read-out in circuit quantum electrodynamics
- Optimal control of a leaking qubit
- Proposal for generating and detecting multi-qubit GHZ states in circuit QED
- Anomalous avoided level crossings in a Cooper-pair box spectrum
- Coherent oscillations in a superconducting tunable flux qubit manipulated without microwaves
- Quantum decoherence of a charge qubit in a spin-fermion model
- Entanglement Dynamics in a Dispersively Coupled Qubit-Oscillator System
- Phase sensitive amplification in a superconducting stripline resonator integrated with a dc-SQUID
- Realistic quantum manipulation of two-level system fluctuators
- Coherent oscillations between classically separable quantum states of a superconducting loop