Measurement of geometric dephasing using a superconducting qubit

Abstract

A quantum system interacting with its environment is subject to dephasing which ultimately destroys the information it holds. Using a superconducting qubit, we experimentally show that this dephasing has both dynamic and geometric origins. It is found that geometric dephasing, which is present even in the adiabatic limit and when no geometric phase is acquired, can either reduce or restore coherence depending on the orientation of the path the qubit traces out in its projective Hilbert space. It accompanies the evolution of any system in Hilbert space subjected to noise.

10 pages, 6 figures

References in corpus (9)

• Charge insensitive qubit design derived from the Cooper pair box
• Experimental realisation of the topological Haldane model
• Observation of Berry's Phase in a Solid State Qubit
• Geometric nature of the environment-induced Berry phase and geometric dephasing
• Geometric phase with nonunitary evolution in presence of a quantum critical bath
• Geometric Phase Gates with Adiabatic Control in Electron Spin Resonance
• Decoherence of adiabatically steered quantum systems
• Geometric phases in superconducting qubits beyond the two-level-approximation
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Cited by in corpus (13)

• Geometric phase from Aharonov-Bohm to Pancharatnam-Berry and beyond
• Entanglement generation in superconducting qubits using holonomic operations
• Robustness of error-suppressing entangling gates in cavity-coupled transmon qubits
• Dephasing Enabled Fast Charging of Quantum Batteries
• Non-Abelian Berry phase for open quantum systems: Topological protection vs geometric dephasing
• Weak-measurement-induced asymmetric dephasing: manifestation of intrinsic measurement chirality
• Non-Abelian Geometric Dephasing
• Weak-measurement-induced phases and dephasing: broken symmetry of the geometric phase
• Protocols to measure the non-Abelian Berry phase by pumping a spin qubit through a quantum-dot loop
• Suppressing the geometric dephasing of Berry phase by using modified dynamical decoupling sequences
• Impacts of Intrinsic Noise and Quantum Entanglement on the Geometric and Dynamical Properties of the XXZ Heisenberg Interacting Spin Model
• Geometric phase and non-adiabatic resonance of the Rabi model
• Non-adiabatic geometric phases and dephasing in an open quantum system