dorsal/arxiv
View SchemaSuperconducting Analogues of Quantum Optical Phenomena: Macroscopic Quantum Superpositions and Squeezing in a SQUID Ring
| Authors | M. J. Everitt, T. D. Clark, P. B. Stiffell, A. Vourdas, J. F. Ralph, R. J. Prance, H. Prance |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0307175 |
| URL | https://arxiv.org/abs/quant-ph/0307175 |
| DOI | 10.1103/PhysRevA.69.043804 |
| Journal | Phys. Rev. A 69, 043804 (2004) |
Abstract
In this paper we explore the quantum behaviour of a SQUID ring which has a significant Josephson coupling energy. We show that that the eigenfunctions of the Hamiltonian for the ring can be used to create macroscopic quantum superposition states of the ring. We also show that the ring potential may be utilised to squeeze coherent states. With the SQUID ring as a strong contender as a device for manipulating quantum information, such properties may be of great utility in the future. However, as with all candidate systems for quantum technologies, decoherence is a fundamental problem. In this paper we apply an open systems approach to model the effect of coupling a quantum mechanical SQUID ring to a thermal bath. We use this model to demonstrate the manner in which decoherence affects the quantum states of the ring.
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"abstract": "In this paper we explore the quantum behaviour of a SQUID ring which has a\nsignificant Josephson coupling energy. We show that that the eigenfunctions of\nthe Hamiltonian for the ring can be used to create macroscopic quantum\nsuperposition states of the ring. We also show that the ring potential may be\nutilised to squeeze coherent states. With the SQUID ring as a strong contender\nas a device for manipulating quantum information, such properties may be of\ngreat utility in the future. However, as with all candidate systems for quantum\ntechnologies, decoherence is a fundamental problem. In this paper we apply an\nopen systems approach to model the effect of coupling a quantum mechanical\nSQUID ring to a thermal bath. We use this model to demonstrate the manner in\nwhich decoherence affects the quantum states of the ring.",
"arxiv_id": "quant-ph/0307175",
"authors": [
"M. J. Everitt",
"T. D. Clark",
"P. B. Stiffell",
"A. Vourdas",
"J. F. Ralph",
"R. J. Prance",
"H. Prance"
],
"categories": [
"quant-ph",
"cond-mat.supr-con"
],
"doi": "10.1103/PhysRevA.69.043804",
"journal_ref": "Phys. Rev. A 69, 043804 (2004)",
"title": "Superconducting Analogues of Quantum Optical Phenomena: Macroscopic Quantum Superpositions and Squeezing in a SQUID Ring",
"url": "https://arxiv.org/abs/quant-ph/0307175"
},
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