Testing Bell's inequality in constantly coupled Josephson circuits by effective single-qubit operations
arXiv:quant-ph/0408089 · doi:10.1103/PhysRevB.72.104516
Abstract
In superconducting circuits with interbit untunable (e.g., capacitive) couplings, ideal local quantum operations cannot be exactly performed on individual Josephson qubits. Here we propose an effective dynamical decoupling approach to overcome the "fixed-interaction" difficulty for effectively implementing elemental logical gates for quantum computation. The proposed single-qubit operations and local measurements should allow testing Bell's inequality with a pair of capacitively-coupled Josephson qubits. This provides a powerful approach, besides spectral-analysis [Nature \textbf{421}, 823 (2003); Science \textbf{300}, 1548 (2003)], to verify the existence of macroscopic quantum entanglement between two fixed-coupling Josephson qubits.
5 pages, three figures
References in corpus (17)
- Violation of Bell's inequality under strict Einstein locality conditions
- Violation of Bell inequalities by photons more than 10 km apart
- Universal Quantum Computation with the Exchange Interaction
- Quantum oscillations in two coupled charge qubits
- Josephson-Junction Qubits with Controlled Couplings
- Deterministic entanglement of two trapped ions
- Demonstration of conditional gate operation using superconducting charge qubits
- Hilbert space structure of a solid state quantum computer: two-electron states of a double quantum dot artificial molecule
- Unification of Dynamical Decoupling and the Quantum Zeno Effect
- Direct detection of quantum entanglement
- Scalable quantum computing with Josephson charge qubits
- Reducing Constraints on Quantum Computer Design by Encoded Selective Recoupling
- Decoherence and gate performance of coupled solid state qubits
- Degree of entanglement for two qubits
- Quantum computation with two-level trapped cold ions beyond Lamb-Dicke limit
- Quantum tomography for solid state qubits
- Coupling Josephson qubits via a current-biased information bus
Cited by in corpus (19)
- Atomic physics and quantum optics using superconducting circuits
- Microwave photonics with superconducting quantum circuits
- Nonperturbative theory of weak pre- and post-selected measurements
- Generation and control of Greenberger-Horne-Zeilinger entanglement in superconducting circuits
- Quantum transducers: Integrating Transmission Lines and Nanomechanical Resonators via Charge Qubits
- Topological states and braiding statistics using quantum circuits
- Distinguishing quantum and classical transport through nanostructures
- Macroscopic Einstein-Podolsky-Rosen pairs in superconducting circuits
- Experimental violation of Bell inequalities for multi-dimensional systems
- Controllable entanglement preparations between atoms in spatially-separated cavities via quantum Zeno dynamics
- Analysis of Bell inequality violation in superconducting qubits
- Jaynes-Cummings Models with trapped electrons on liquid Helium
- Quantum state engineering with flux-biased Josephson phase qubits by Stark-chirped rapid adiabatic passages
- Testing tripartite Mermin inequalities by spectral joint-measurements of qubits
- Entanglement Dynamics for Two Spins in an Optical Cavity---Field Interaction Induced Decoherence and Coherence Revival
- Non-Markovian entanglement dynamics in coupled superconducting qubit systems
- Effects of decoherence and errors on Bell-inequality violation
- Extended Bell inequality and maximum violation
- Circuit QED: Generation of two-transmon-qutrit entangled states via resonant interaction