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

Journal Article · Thu Jul 15 00:00:00 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, Vol. 82, Issue 1; Other Information: DOI: 10.1103/PhysRevA.82.012336; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

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