dorsal/arxiv
View SchemaMultimode theory of measurement-induced non-Gaussian operation on wideband squeezed light
| Authors | M. Sasaki, S. Suzuki |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0512073 |
| URL | https://arxiv.org/abs/quant-ph/0512073 |
| DOI | 10.1103/PhysRevA.73.043807 |
Abstract
We present a multimode theory of non-Gaussian operation induced by an imperfect on/off-type photon detector on a splitted beam from a wideband squeezed light. The events are defined for finite time duration $T$ in the time domain. The non-Gaussian output state is measured by the homodyne detector with finite bandwidh $B$. Under this time- and band-limitation to the quantm states, we develop a formalism to evaluate the frequency mode matching between the on/off trigger channel and the conditional signal beam in the homodyne channel. Our formalism is applied to the CW and pulsed schemes. We explicitly calculate the Wigner function of the conditional non-Gaussian output state in a realistic situation. Good mode matching is achieved for $BT\alt1$, where the discreteness of modes becomes prominant, and only a few modes become dominant both in the on/off and the homodyne channels. If the trigger beam is projected nearly onto the single photon state in the most dominant mode in this regime, the most striking non-classical effect will be observed in the homodyne statistics. The increase of $BT$ and the dark counts degrades the non-classical effect.
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"abstract": "We present a multimode theory of non-Gaussian operation induced by an\nimperfect on/off-type photon detector on a splitted beam from a wideband\nsqueezed light. The events are defined for finite time duration $T$ in the time\ndomain. The non-Gaussian output state is measured by the homodyne detector with\nfinite bandwidh $B$. Under this time- and band-limitation to the quantm states,\nwe develop a formalism to evaluate the frequency mode matching between the\non/off trigger channel and the conditional signal beam in the homodyne channel.\nOur formalism is applied to the CW and pulsed schemes. We explicitly calculate\nthe Wigner function of the conditional non-Gaussian output state in a realistic\nsituation. Good mode matching is achieved for $BT\\alt1$, where the discreteness\nof modes becomes prominant, and only a few modes become dominant both in the\non/off and the homodyne channels. If the trigger beam is projected nearly onto\nthe single photon state in the most dominant mode in this regime, the most\nstriking non-classical effect will be observed in the homodyne statistics. The\nincrease of $BT$ and the dark counts degrades the non-classical effect.",
"arxiv_id": "quant-ph/0512073",
"authors": [
"M. Sasaki",
"S. Suzuki"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.043807",
"title": "Multimode theory of measurement-induced non-Gaussian operation on wideband squeezed light",
"url": "https://arxiv.org/abs/quant-ph/0512073"
},
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