dorsal/arxiv
View SchemaQuantum measurements and new concepts for experiments with trapped ions
| Authors | Christof Wunderlich, Christoph Balzer |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0305129 |
| URL | https://arxiv.org/abs/quant-ph/0305129 |
| Journal | Advances in Atomic, Molecular, and Optical Physics Vol. 49, Academic Press, 2003, 295-376 |
Abstract
Experiments with individual trapped ions are ideally suited to investigate fundamental issues of quantum mechanics such as the measurement process. At the same time electrodynamically trapped ions have been used with great success to demonstrate quantum logic operations and are a candidate for scalable quantum computing. In this article a brief introduction is given to the basic steps that constitute a quantum measurement; in particular, measurements on single quantum systems are considered. Then experiments with single Yb+ are reviewed demonstrating the quantum Zeno paradox, as well as an experiment where an adaptive algorithm for quantum state estimation of qubits was implemented. In the last section of this article -- devoted to experiments and new ideas related to quantum information processing (QIP) with trapped ions -- the realization of various quantum channels using a hyperfine qubit of Yb+ is briefly discussed. Then a concept for QIP with trapped ions is reviewed where rf or microwave radiation is used instead of laser light for coherent manipulation of a collection of ions. In a suitably modified trap the ions form an artificial ion "molecule" to which the techniques developed in nuclear magnetic resonance and electron spin resonance experiments can be directly applied. Finally, coherent excitation of optical electric quadrupole transitions in Yb+ and Ba+ is reported. In addition, robust Raman cooling of a pair of Ba+ ions is reviewed.
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"abstract": "Experiments with individual trapped ions are ideally suited to investigate\nfundamental issues of quantum mechanics such as the measurement process. At the\nsame time electrodynamically trapped ions have been used with great success to\ndemonstrate quantum logic operations and are a candidate for scalable quantum\ncomputing. In this article a brief introduction is given to the basic steps\nthat constitute a quantum measurement; in particular, measurements on single\nquantum systems are considered. Then experiments with single Yb+ are reviewed\ndemonstrating the quantum Zeno paradox, as well as an experiment where an\nadaptive algorithm for quantum state estimation of qubits was implemented. In\nthe last section of this article -- devoted to experiments and new ideas\nrelated to quantum information processing (QIP) with trapped ions -- the\nrealization of various quantum channels using a hyperfine qubit of Yb+ is\nbriefly discussed. Then a concept for QIP with trapped ions is reviewed where\nrf or microwave radiation is used instead of laser light for coherent\nmanipulation of a collection of ions. In a suitably modified trap the ions form\nan artificial ion \"molecule\" to which the techniques developed in nuclear\nmagnetic resonance and electron spin resonance experiments can be directly\napplied. Finally, coherent excitation of optical electric quadrupole\ntransitions in Yb+ and Ba+ is reported. In addition, robust Raman cooling of a\npair of Ba+ ions is reviewed.",
"arxiv_id": "quant-ph/0305129",
"authors": [
"Christof Wunderlich",
"Christoph Balzer"
],
"categories": [
"quant-ph"
],
"journal_ref": "Advances in Atomic, Molecular, and Optical Physics Vol. 49,\n Academic Press, 2003, 295-376",
"title": "Quantum measurements and new concepts for experiments with trapped ions",
"url": "https://arxiv.org/abs/quant-ph/0305129"
},
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