Local model of a qubit in the interferometric setup
We consider a typical realization of a qubit as a single particle in two-path interferometric circuits built from phase shifters, beam splitters and detectors. This framework is often taken as a standard example illustrating various paradoxes and quantum effects, including non-locality. In this pape...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/17/11/113043 |
| _version_ | 1797751103366889472 |
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| author | Pawel Blasiak |
| author_facet | Pawel Blasiak |
| author_sort | Pawel Blasiak |
| collection | DOAJ |
| description | We consider a typical realization of a qubit as a single particle in two-path interferometric circuits built from phase shifters, beam splitters and detectors. This framework is often taken as a standard example illustrating various paradoxes and quantum effects, including non-locality. In this paper we show that it is possible to simulate the behaviour of such circuits in a classical manner using stochastic gates and two kinds of particles, real ones and ghosts , which interact only locally. The model has built-in limited information gain and state disturbance in measurements which are blind to ghosts . We demonstrate that predictions of the model are operationally indistinguishable from the quantum case of a qubit, and allegedly ‘non-local’ effects arise only on the epistemic level of description by the agent whose knowledge is incomplete due to the restricted means of investigating the system. |
| first_indexed | 2024-03-12T16:42:33Z |
| format | Article |
| id | doaj.art-7896597a0209446f9da08d0df791e7d8 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:42:33Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-7896597a0209446f9da08d0df791e7d82023-08-08T14:23:18ZengIOP PublishingNew Journal of Physics1367-26302015-01-01171111304310.1088/1367-2630/17/11/113043Local model of a qubit in the interferometric setupPawel Blasiak0Institute of Nuclear Physics , Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, PolandWe consider a typical realization of a qubit as a single particle in two-path interferometric circuits built from phase shifters, beam splitters and detectors. This framework is often taken as a standard example illustrating various paradoxes and quantum effects, including non-locality. In this paper we show that it is possible to simulate the behaviour of such circuits in a classical manner using stochastic gates and two kinds of particles, real ones and ghosts , which interact only locally. The model has built-in limited information gain and state disturbance in measurements which are blind to ghosts . We demonstrate that predictions of the model are operationally indistinguishable from the quantum case of a qubit, and allegedly ‘non-local’ effects arise only on the epistemic level of description by the agent whose knowledge is incomplete due to the restricted means of investigating the system.https://doi.org/10.1088/1367-2630/17/11/113043localityquantum interferometryontological modelsepistemic restrictions03.65.Ta03.65.Ud |
| spellingShingle | Pawel Blasiak Local model of a qubit in the interferometric setup New Journal of Physics locality quantum interferometry ontological models epistemic restrictions 03.65.Ta 03.65.Ud |
| title | Local model of a qubit in the interferometric setup |
| title_full | Local model of a qubit in the interferometric setup |
| title_fullStr | Local model of a qubit in the interferometric setup |
| title_full_unstemmed | Local model of a qubit in the interferometric setup |
| title_short | Local model of a qubit in the interferometric setup |
| title_sort | local model of a qubit in the interferometric setup |
| topic | locality quantum interferometry ontological models epistemic restrictions 03.65.Ta 03.65.Ud |
| url | https://doi.org/10.1088/1367-2630/17/11/113043 |
| work_keys_str_mv | AT pawelblasiak localmodelofaqubitintheinterferometricsetup |