dorsal/arxiv
View SchemaA naturally error suppressing quantum memory
| Authors | Fumiko Yamaguchi, Yoshihisa Yamamoto |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603159 |
| URL | https://arxiv.org/abs/quant-ph/0603159 |
Abstract
We propose a method to construct quantum storage wherein the phase error due to decoherence is naturally suppressed without constant error detection and correction. As an example, we describe a quantum memory made of two physical qubits encoded in the ground state of a two-qubit phase-error detecting code. Such a system can be simulated by introducing a coupling between the two physical qubits. This method is effective for physical systems in which the $T_1$ decay process is negligible but coherence is limited by the $T_2$ decay process. We take trapped ions as a possible example to apply the natural suppression method and show that the $T_2$ decay time due to slow ambient fluctuating fields at the physical qubits can be lengthened as much as $10^4$.
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"abstract": "We propose a method to construct quantum storage wherein the phase error due\nto decoherence is naturally suppressed without constant error detection and\ncorrection. As an example, we describe a quantum memory made of two physical\nqubits encoded in the ground state of a two-qubit phase-error detecting code.\nSuch a system can be simulated by introducing a coupling between the two\nphysical qubits. This method is effective for physical systems in which the\n$T_1$ decay process is negligible but coherence is limited by the $T_2$ decay\nprocess. We take trapped ions as a possible example to apply the natural\nsuppression method and show that the $T_2$ decay time due to slow ambient\nfluctuating fields at the physical qubits can be lengthened as much as $10^4$.",
"arxiv_id": "quant-ph/0603159",
"authors": [
"Fumiko Yamaguchi",
"Yoshihisa Yamamoto"
],
"categories": [
"quant-ph"
],
"title": "A naturally error suppressing quantum memory",
"url": "https://arxiv.org/abs/quant-ph/0603159"
},
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