dorsal/arxiv
View SchemaCoherent state LOQC gates using simplified diagonal superposition resource states
| Authors | A. P. Lund, T. C. Ralph |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0410204 |
| URL | https://arxiv.org/abs/quant-ph/0410204 |
| DOI | 10.1103/PhysRevA.71.032305 |
Abstract
In this paper we explore the possibility of fundamental tests for coherent state optical quantum computing gates [T. C. Ralph, et. al, Phys. Rev. A \textbf{68}, 042319 (2003)] using sophisticated but not unrealistic quantum states. The major resource required in these gates are state diagonal to the basis states. We use the recent observation that a squeezed single photon state ($\hat{S}(r) \ket{1}$) approximates well an odd superposition of coherent states ($\ket{\alpha} - \ket{-\alpha}$) to address the diagonal resource problem. The approximation only holds for relatively small $\alpha$ and hence these gates cannot be used in a scaleable scheme. We explore the effects on fidelities and probabilities in teleportation and a rotated Hadamard gate.
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"abstract": "In this paper we explore the possibility of fundamental tests for coherent\nstate optical quantum computing gates [T. C. Ralph, et. al, Phys. Rev. A\n\\textbf{68}, 042319 (2003)] using sophisticated but not unrealistic quantum\nstates. The major resource required in these gates are state diagonal to the\nbasis states. We use the recent observation that a squeezed single photon state\n($\\hat{S}(r) \\ket{1}$) approximates well an odd superposition of coherent\nstates ($\\ket{\\alpha} - \\ket{-\\alpha}$) to address the diagonal resource\nproblem. The approximation only holds for relatively small $\\alpha$ and hence\nthese gates cannot be used in a scaleable scheme. We explore the effects on\nfidelities and probabilities in teleportation and a rotated Hadamard gate.",
"arxiv_id": "quant-ph/0410204",
"authors": [
"A. P. Lund",
"T. C. Ralph"
],
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"quant-ph"
],
"doi": "10.1103/PhysRevA.71.032305",
"title": "Coherent state LOQC gates using simplified diagonal superposition resource states",
"url": "https://arxiv.org/abs/quant-ph/0410204"
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