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<center><wz tip="">[[File:Screenshot_20240625_171503.png|650px]]</wz></center> | <center><wz tip="">[[File:Screenshot_20240625_171503.png|650px]]</wz></center> | ||
| − | {{quote|Our experiment thus resurrects the photoelectric effect as a phenomenon requiring quantization of the electromagnetic field.}} | + | {{quote|Our experiment thus resurrects the photoelectric effect as a phenomenon requiring quantization of the electromagnetic field.|style={{opencite}}}} |
| − | This is an | + | This is an early paper studying photon cascades, claiming to show quantization of the light field (an important question at this time of [[Jaynes]]' neoclassical theory. |
| + | <center><wz tip="Strange formulation; Clauser probably means 'no such test has heretofore been conclusive'">[[File:Screenshot_20240625_190840.png|400px]]</wz></center> | ||
In a first section, Clauser shows that previous experimental attempts were not able to show photon quantization. Then he claims to show that himself, with Cauchy-Schwarz violation in coincidences from photon cascades. The source is Hg atoms excited by electron bombardment, so apparently incoherent pumping, with the cascade $9{}^1P_1\to7{}^3S_1\to6{}^3P_1$. | In a first section, Clauser shows that previous experimental attempts were not able to show photon quantization. Then he claims to show that himself, with Cauchy-Schwarz violation in coincidences from photon cascades. The source is Hg atoms excited by electron bombardment, so apparently incoherent pumping, with the cascade $9{}^1P_1\to7{}^3S_1\to6{}^3P_1$. | ||
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This is the experimental result (seemingly from Clauser alone!): | This is the experimental result (seemingly from Clauser alone!): | ||
| − | <center><wz tip="An early demonstration of quantization of the light-field.">[[File:Screenshot_20240625_192238.png|650px]]</wz></center> | + | <center><wz tip="An early demonstration of quantization of the light-field, possibly also first photon cascades observed in coincidences.">[[File:Screenshot_20240625_192238.png|650px]]</wz></center> |
| − | Panels (a) and (d) show the cascade, (b) and (c) show no correlation | + | Panels (a) and (d) show the cascade, (b) and (c) show no correlation (shouldn't it be antibunched?) with the quantum source while (e) and (f) show bunching with the classical source (probably HB effect). The main result is (g) that shows violation of Cauchy-Schwartz inequality and thus that the field is quantized. |
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Revision as of 17:38, 25 June 2024
Experimental distinction between the quantum and classical field-theoretic predictions for the photoelectric effect. J. F. Clauser in Phys. Rev. D 9:853 (1974). What the paper says?
Our experiment thus resurrects the photoelectric effect as a phenomenon requiring quantization of the electromagnetic field.
This is an early paper studying photon cascades, claiming to show quantization of the light field (an important question at this time of Jaynes' neoclassical theory.
In a first section, Clauser shows that previous experimental attempts were not able to show photon quantization. Then he claims to show that himself, with Cauchy-Schwarz violation in coincidences from photon cascades. The source is Hg atoms excited by electron bombardment, so apparently incoherent pumping, with the cascade $9{}^1P_1\to7{}^3S_1\to6{}^3P_1$.
This is the experimental result (seemingly from Clauser alone!):
Panels (a) and (d) show the cascade, (b) and (c) show no correlation (shouldn't it be antibunched?) with the quantum source while (e) and (f) show bunching with the classical source (probably HB effect). The main result is (g) that shows violation of Cauchy-Schwartz inequality and thus that the field is quantized.