Decoherence effects in interacting qubits under the influence of various environments
arXiv:0905.3399 · doi:10.1088/0953-4075/42/20/205502
Abstract
We study competition between the dissipative and coherent effects in the entanglement dynamics of two qubits. The coherent interactions are needed for designing logic gate operations with systems like ion traps, semicondutor quantum dots and atoms. We show that the interactions lead to a phenomenon of periodic disentanglement and entanglement between the qubits. The disentanglement is primarily caused by environmental perturbations. The qubits are seen to remain disentangled for a finite time before getting entangled again. We find that the phenomenon is generic and occurs for wide variety of models of the environment. We present analytical results for the time dependence of concurrence for all the models. The periodic disentanglement and entanglement behavior is seen to be precursor to the sudden death of entanglement (ESD) and can happen, for environments which do not show ESD for noninteracting qubits. Further we also find that this phenomenon can even lead to delayed death of entanglement for correlated environments.
New published version, new figures
References in corpus (29)
- Experimental quantum teleportation
- Finite-Time Disentanglement via Spontaneous Emission
- Sudden Death of Entanglement
- Quantum Open System Theory: Bipartite Aspects
- Quantum Teleportation Between Distant Matter Qubits
- Dark periods and revivals of entanglement in a two qubit system
- Sudden Birth Versus Sudden Death of Entanglement in Multipartite Systems
- Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
- Heralded Entanglement between Atomic Ensembles: Preparation, Decoherence, and Scaling
- Sudden Death of Entanglement: Classical Noise Effects
- Sudden Death of Entanglement of Two Jaynes-Cummings Atoms
- Dynamics of the entanglement between two oscillators in the same environment
- Sudden death and sudden birth of entanglement in common structured reservoirs
- Delayed (sudden) birth of entanglement
- Direct measurement of finite-time disentanglement induced by a reservoir
- Exact Master Equation and Quantum Decoherence of Two Coupled Harmonic Oscillators in a General Environment
- Entanglement and purity of two-mode Gaussian states in noisy channels
- Non-Markovian entanglement dynamics of quantum continuous variable systems in thermal environments
- Entanglement oscillations in non-Markovian quantum channels
- Universal set of quantum gates for double-dot spin qubits with fixed interdot coupling
- Entangling oscillators through environment noise
- Preventing Multipartite Disentanglement by Local Modulations
- Decoherence of two qubit systems: A random matrix description
- Entangling capacities of noisy two-qubit Hamiltonians
- Decoherence of Bell states by local interactions with a dynamic spin environment
- Decoherence of an -qubit quantum memory
- Entanglement sudden birth of two trapped ions interacting with a time-dependent laser field
- Vacuum as a less hostile environment to entanglement
- Dependence of the decoherence of polarization states in phase-damping channels on the frequency spectrum envelope of photons
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- Protecting Bi-Partite Entanglement by Quantum Interferences
- Experimental investigation of enviroment--induced entanglement using an all--optical setup
- Suppression of Decoherence and Disentanglement by the Exchange Interaction
- Autonomous quantum absorption refrigerators
- Exact non-Markovian master equation for a driven damped two-level system
- Quantum interference in timed Dicke basis and its effect on bipartite entanglement
- Random Matrix Ensembles For Many-Body Quantum Systems
- General recipe for immediate entanglement death-birth transitions via Bell states: environmental Heisenberg exchange as an example
- Entanglement properties of superconducting qubits coupled to a semi-infinite transmission line
- Time evolution of quantum correlations in presence of state dependent bath