Arbitrary control of multiple-qubit systems in the symmetric Dicke subspace

Abstract

We discuss a general physical mechanism for arbitrary control of the quantum states of multiple qubits in the symmetric Dicke subspace. The qubit-qubit coupling leads to unequal energy spacing in the symmetric Dicke subspace. This allows one to manipulate a prechosen transition with an external driving source, with other transitions remaining off-resonant. Any entangled state in the symmetric Dicke subspace can be created from the initial ground state by tuning the driving source. We illustrate the idea in cavity QED, but it should be applicable to other related systems.

References in corpus (8)

• Long-distance quantum communication with atomic ensembles and linear optics
• Three qubits can be entangled in two inequivalent ways
• Dark-State Polaritons in Electromagnetically Induced Transparency
• Quantum memory for photons: I. Dark state polaritons
• Coherent control of an atomic collision in a cavity
• Characterizing the entanglement of symmetric many-particle spin-1/2 systems
• Characterizing multiparticle entanglement in symmetric N-qubit states via negativity of covariance matrices
• Decoherence in collective quantum memories for photons

Cited by in corpus (4)

• Stochastic local operations and classical communication properties of the n-qubit symmetric Dicke states
• Multipartite Entanglement Generation Assisted by Inhomogeneous Coupling
• A proposal for implementing an n-qubit controlled-rotation gate with three-level superconducting qubit systems in cavity QED
• Precision magnetometry exploiting excited state quantum phase transitions