Coherence control for qubits

2003/07/31 by Karen M. Fonseca-Romero, K. M. Fonseca-Romero, Sigmund Kohler +1 · 5 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #quant-ph

paper · pdf · doi:10.1016/j.chemphys.2003.09.015

published as Chem. Phys. 296, 307 (2004) · 15 pages, 1 figure

arxiv created 2003/07/31 · openalex publication_date 2003/10/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the influence of an external driving field on the coherence properties of a qubit under the influence of bit-flip noise. In the presence of driving, two paradigmatic cases are considered: (i) a field that results for a suitable choice of the parameters in so-called coherent destruction of tunneling and (ii) one that commutes with the static qubit Hamiltonian. In each case, we give for high-frequency driving a lower bound for the coherence time. This reveals the conditions under which the external fields can be used for coherence stabilization.

Citations

• Solution of the Schrödinger Equation with a Hamiltonian Periodic in Time
• Dynamics of the dissipative two-state system

Cited by

• Time-resolved qubit readout via nonlinear Josephson inductance
• Continuous dynamical protection of two-qubit entanglement from uncorrelated dephasing, bit flipping, and dissipation
• Qubit interference at avoided crossings: The role of driving shape and bath coupling
• Improving the purity of one‐ and two‐qubit gates
• Decoherence control: Universal protection of two-qubit states and two-qubit gates using continuous driving fields

Related

• Autonomous coherence protection of a two-level system in a fluctuating environment
• Stabilizing qubit coherence via tracking-control
• Coherence Stabilization of a Two-Qubit Gate by ac Fields
• Protecting qubit coherence by spectrally engineered driving of the spin environment
• Decoherence of a solid-state qubit by different noise correlation spectra