Generalized Coherent States of Quantized Electromagnetic Fields

Farhan Saif, Shinichi Watanabe

In chapter 2, following the Maxwell description, we discuss vector potential, the continuity equation, and energy and momentum corresponding to optical fields. Based on the Maxwell depiction, quantization of electromagnetic fields is obtained. Quantized electromagnetic fields, such as Fock states, coherent states, squeezed states, and Schrödinger cat states, provide a general understanding of the quantum nature of the field. Thereby, we build the necessary foundation-level knowledge required to understand electromagnetic fields in the quantum domain.

Jan Peřina

Eugene Y. C. Lu

程太旺, 薛艳丽

We study a non-stationary electronic wave packet in a quantized electromagnetic field.Generally,the electron and field become entangled as the electronic wave packet evolves.Here we find that,when the initial photon state is a coherent one,the wavefunction of the system can be factorized if we neglect the transferred photon number.In this case,the quantized-field calculation is equivalent to the semi-classical calculation.

Vladislav G. Bagrov, Иосиф Львович Бухбиндер, Dmitri M Gitman +1 more

Taiwang Cheng, Yan-Li Xue, Li Xiao-Feng +2 more

We study a non-stationary electronic wave packet in a quantized electromagnetic field. Generally, the electron and field become entangled as the electronic wave packet evolves. Here we find that, when the initial photon state is a coherent one, the wavefunction of the system can be factorized if we neglect the transferred photon number. In this case, the quantized-field calculation is equivalent to the semi-classical calculation.