dorsal/arxiv
View SchemaTheory of multiwave mixing and decoherence control in qubit array system
| Authors | M. Sasaki, A. Hasegawa, J. I. Hayase, Y. Mitsumori, F. Minami |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0411021 |
| URL | https://arxiv.org/abs/quant-ph/0411021 |
| DOI | 10.1103/PhysRevB.71.165314 |
Abstract
We develop a theory to analyze the decoherence effect in a charged qubit array system with photon echo signals in the multiwave mixing configuration. We present how the decoherence suppression effect by the {\it bang-bang} control with the $\pi$ pulses can be demonstrated in laboratory by using a bulk ensemble of exciton qubits and optical pulses whose pulse area is even smaller than $\pi$. Analysis is made on the time-integated multiwave mixing signals diffracted into certain phase matching directions from a bulk ensemble. Depending on the pulse interval conditions, the cross over from the decoherence acceleration regime to the decoherence suppression regime, which is a peculiar feature of the coherent interaction between a qubit and the reservoir bosons, may be observed in the time-integated multiwave mixing signals in the realistic case including inhomogeneous broadening effect. Our analysis will successfully be applied to precise estimation of the reservoir parameters from experimental data of the direction resolved signal intensities obtained in the multiwave mixing technique.
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"abstract": "We develop a theory to analyze the decoherence effect in a charged qubit\narray system with photon echo signals in the multiwave mixing configuration. We\npresent how the decoherence suppression effect by the {\\it bang-bang} control\nwith the $\\pi$ pulses can be demonstrated in laboratory by using a bulk\nensemble of exciton qubits and optical pulses whose pulse area is even smaller\nthan $\\pi$. Analysis is made on the time-integated multiwave mixing signals\ndiffracted into certain phase matching directions from a bulk ensemble.\nDepending on the pulse interval conditions, the cross over from the decoherence\nacceleration regime to the decoherence suppression regime, which is a peculiar\nfeature of the coherent interaction between a qubit and the reservoir bosons,\nmay be observed in the time-integated multiwave mixing signals in the realistic\ncase including inhomogeneous broadening effect. Our analysis will successfully\nbe applied to precise estimation of the reservoir parameters from experimental\ndata of the direction resolved signal intensities obtained in the multiwave\nmixing technique.",
"arxiv_id": "quant-ph/0411021",
"authors": [
"M. Sasaki",
"A. Hasegawa",
"J. I. Hayase",
"Y. Mitsumori",
"F. Minami"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevB.71.165314",
"title": "Theory of multiwave mixing and decoherence control in qubit array system",
"url": "https://arxiv.org/abs/quant-ph/0411021"
},
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