Spin State Transfer in Laterally Coupled Quantum Dot Chains with Disorders
arXiv:1005.2571 · doi:10.1103/PhysRevA.82.022336
Abstract
Quantum dot arrays are a promising media for transferring quantum information between two distant points without resorting to mobile qubits. Here we study two most common disorders namely, hyperfine interaction and exchange coupling fluctuations, in quantum dot arrays and their effects on quantum communication through these chains. Our results show that the hyperfine interaction is more destructive than the exchange coupling fluctuations. The average optimal time for communication is not affected by any disorder in the system and our simulations show that anti-ferromagnetic chains are much more resistive than the ferromagnetic ones against both kind of disorders. Even when time modulation of a coupling and optimal control is employed to improve the transmission, the anti-ferromagnetic chain performs much better. We have assumed the quasi-static approximation for hyperfine interaction and time dependent fluctuations in the exchange couplings. Particularly, for studying exchange coupling fluctuations we have considered the static disorder, white noise and noise.
10 pages, 12 figures. Comments are welcome!
References in corpus (16)
- Single-shot read-out of an individual electron spin in a quantum dot
- Driven coherent oscillations of a single electron spin in a quantum dot
- Coherent control of a single electron spin with electric fields
- Zeeman energy and spin relaxation in a one-electron quantum dot
- The power of quantum systems on a line
- Universal set of quantum gates for double-dot spin qubits with fixed interdot coupling
- Current noise in a vibrating quantum dot array
- Exchange coupling in silicon quantum dots: Theoretical considerations for quantum computation
- State transfer in static and dynamic spin chains with disorder
- Decoherence effects on the quantum spin channels
- Robust Entanglement in Anti-ferromagnetic Heisenberg Chains by Single-spin Optimal Control
- Quantum communication beyond the localization length in disordered spin chains
- Global controllability with a single local actuator
- Freezing distributed entanglement in spin chains
- Heisenberg chains cannot mirror a state
- The Role of Rotational Invariance in the Properties of Hamiltonians
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