dorsal/arxiv
View SchemaAssessment of a quantum phase gate operation based on nonlinear optics
| Authors | S. Rebic, C. Ottaviani, G. Di Giuseppe, D. Vitali, P. Tombesi |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0605100 |
| URL | https://arxiv.org/abs/quant-ph/0605100 |
| DOI | 10.1103/PhysRevA.74.032301 |
| Journal | Phys Rev A 74, 032301 (2006) |
Abstract
We analyze in detail the proposal for a two-qubit gate for travelling single-photon qubits recently presented by C. Ottaviani \emph{et al}. [Phys. Rev. A \textbf{73}, 010301(R) (2006)]. The scheme is based on an ensemble of five-level atoms coupled to two quantum and two classical light fields. The two quantum fields undergo cross-phase modulation induced by electromagnetically induced transparency. The performance of this two-qubit quantum phase gate for travelling single-photon qubits is thoroughly examined in the steady-state and transient regimes, by means of a full quantum treatment of the system dynamics. In the steady-state regime, we find a general trade-off between the size of the conditional phase shift and the fidelity of the gate operation. However, this trade-off can be bypassed in the transient regime, where a satisfactory gate operation is found to be possible, significantly reducing the gate operation time.
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"abstract": "We analyze in detail the proposal for a two-qubit gate for travelling\nsingle-photon qubits recently presented by C. Ottaviani \\emph{et al}. [Phys.\nRev. A \\textbf{73}, 010301(R) (2006)]. The scheme is based on an ensemble of\nfive-level atoms coupled to two quantum and two classical light fields. The two\nquantum fields undergo cross-phase modulation induced by electromagnetically\ninduced transparency. The performance of this two-qubit quantum phase gate for\ntravelling single-photon qubits is thoroughly examined in the steady-state and\ntransient regimes, by means of a full quantum treatment of the system dynamics.\nIn the steady-state regime, we find a general trade-off between the size of the\nconditional phase shift and the fidelity of the gate operation. However, this\ntrade-off can be bypassed in the transient regime, where a satisfactory gate\noperation is found to be possible, significantly reducing the gate operation\ntime.",
"arxiv_id": "quant-ph/0605100",
"authors": [
"S. Rebic",
"C. Ottaviani",
"G. Di Giuseppe",
"D. Vitali",
"P. Tombesi"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.74.032301",
"journal_ref": "Phys Rev A 74, 032301 (2006)",
"title": "Assessment of a quantum phase gate operation based on nonlinear optics",
"url": "https://arxiv.org/abs/quant-ph/0605100"
},
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