Suppressing decoherence and improving entanglement by quantum-jump-based feedback control in two-level systems

Journal Article · Thu Jul 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.012336· OSTI ID:21442899

Hou, S C; Huang, X L; Yi, X X ^[1]

---

1. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

We study the quantum-jump-based feedback control on the entanglement shared between two qubits with one of them subject to decoherence while the other qubit is under the control. This situation is very relevant to a quantum system consisting of nuclear and electron spins in solid states. The possibility of prolonging the coherence time of the dissipative qubit is also explored. Numerical simulations show that the quantum-jump-based feedback control can improve the entanglement between the qubits and prolong the coherence time for the qubit subject directly to decoherence.

• OSTI ID: 21442899
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR MOMENTUM
COMPUTERIZED SIMULATION
CONTROL
ELECTRONS
ELEMENTARY PARTICLES
ENERGY LEVELS
FEEDBACK
FERMIONS
INFORMATION
LEPTONS
PARTICLE PROPERTIES
QUANTUM DECOHERENCE
QUANTUM ENTANGLEMENT
QUANTUM INFORMATION
QUANTUM STATES
QUBITS
SIMULATION
SOLIDS
SPIN