Correlation-induced suppression of decoherence in capacitively coupled Cooper-pair boxes

Abstract

Charge fluctuations from gate bias and background traps severely limit the performance of a charge qubit in a Cooper-pair box (CPB). Here we present an experimentally realizable method to control the decoherence effects of these charge fluctuations using two strongly capacitively coupled CPBs. This coupled-box system has a low-decoherence subspace of two states. Our results show that the inter-box Coulomb correlation can help significantly suppress decoherence of this two-level system, making it a promising candidate as a logical qubit, encoded using two CPBs.

5 pages, 2 figures. Phys. Rev. B, in press

References in corpus (1)

• Quantum noise in the Josephson charge qubit

Cited by in corpus (27)

• Open quantum systems with local and collective incoherent processes: Efficient numerical simulation using permutational invariance
• Entanglement dynamics in chains of qubits with noise and disorder
• All-Microwave Control and Dispersive Readout of Gate-Defined Quantum Dot Qubits in Circuit Quantum Electrodynamics
• Environment-Assisted Quantum State Restoration Via Weak Measurement
• A decoherence-free subspace in a charge quadrupole qubit
• Generation and propagation of entanglement in driven coupled-qubit systems
• In-situ Tuning of the Electric Dipole Strength of a Double Dot Charge Qubit: Charge Noise Protection and Ultra Strong Coupling
• Restoration of Quantum State in Dephasing Channel
• Quantum mechanical approach to decoherence and relaxation generated by fluctuating environment
• Correlated flux noise and decoherence in two inductively coupled flux qubits
• Quantum electromechanics: Quantum tunneling near resonance and qubits from buckling nanobars
• Effects of low-frequency noise cross-correlations in coupled superconducting qubits
• Hybridized solid-state qubit in the charge-flux regime
• Implementing topological quantum manipulation with superconducting circuits
• Correlated vs. uncorrelated noise acting on a quantum refrigerator
• Retrieving qubit information despite decoherence
• Decoherence of coupled electron spins via nuclear spin dynamics in quantum dots
• Nonperturbative stochastic dynamics driven by strongly correlated colored noises
• Multielectron Ground State Electroluminescence
• Decoherence dynamics of a qubit coupled to a quantum two-level system
• Dissipation and decoherence induced by collective dephasing in coupled-qubit system with a common bath
• Universal Dissipationless Dynamics in Gaussian Continuous-variable Open Systems
• Collective quantum phase slips in multiple nanowire junctions
• Strongly-coupled Josephson junction array for simulation of frustrated one-dimensional spin models
• Noise-spectroscopy of multiqubit systems: Determining all their parameters by applying an external classical noise
• A Chain-Boson Model for the Decoherence and Relaxation of a Few Coupled SQUIDs in a Phonon Bath
• Geometric and holonomic quantum computation