Coherence and Decay of Higher Energy Levels of a Superconducting Transmon Qubit

Abstract

We present measurements of coherence and successive decay dynamics of higher energy levels of a superconducting transmon qubit. By applying consecutive $\pi$-pulses for each sequential transition frequency, we excite the qubit from the ground state up to its fourth excited level and characterize the decay and coherence of each state. We find the decay to proceed mainly sequentially, with relaxation times in excess of 20 $\mu$s for all transitions. We also provide a direct measurement of the charge dispersion of these levels by analyzing beating patterns in Ramsey fringes. The results demonstrate the feasibility of using higher levels in transmon qubits for encoding quantum information.

arXiv commentMinor corrections. Added two plots in Figure 2. Added figures of the setup and the Ramsey fits in the supplemental material, as as more details on the device characterization. Rephrased last paragraph on charge dissipation. Added some references

References in corpus (24)

• Charge insensitive qubit design derived from the Cooper pair box
• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• Security of quantum key distribution using d-level systems
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture
• Approaching Unit Visibility for Control of a Superconducting Qubit with Dispersive Readout
• Quantum cryptography with 3-state systems
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Controlling the spontaneous emission of a superconducting transmon qubit
• Multi-valued Logic Gates for Quantum Computation
• Experimental Realization of Non-Abelian Geometric Gates
• Millisecond charge-parity fluctuations and induced decoherence in a superconducting qubit
• Relaxation and frequency shifts induced by quasiparticles in superconducting qubits
• Implementing optimal control pulse shaping for improved single-qubit gates
• Two-photon probe of the Jaynes-Cummings model and symmetry breaking in circuit QED
• Control and Tomography of a Three Level Superconducting Artificial Atom
• Quasiparticle relaxation of superconducting qubits in the presence of flux
• Measurement of the decay of Fock states in a superconducting quantum circuit
• Asymptotically Optimal Quantum Circuits for d-level Systems
• Microwave-activated conditional-phase gate for superconducting qubits
• Security of Quantum Key Distribution with entangled quNits
• Measurements of Quasiparticle Tunneling Dynamics in a Bandgap-Engineered Transmon Qubit
• Decoherence of superconducting qubits caused by quasiparticle tunneling
• Simple and secure quantum key distribution with biphotons

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