{"id":9454,"date":"2024-06-24T16:17:16","date_gmt":"2024-06-24T14:17:16","guid":{"rendered":"https:\/\/lncmi.cnrs.fr\/?page_id=9454"},"modified":"2025-06-04T10:11:39","modified_gmt":"2025-06-04T08:11:39","slug":"magnetic-vacuum-birefringence","status":"publish","type":"page","link":"https:\/\/lncmi.cnrs.fr\/en\/optics-and-diluted-matter\/magnetic-vacuum-birefringence\/","title":{"rendered":"Magnetic vacuum birefringence"},"content":{"rendered":"

[et_pb_section fb_built=”1″ fullwidth=”on” _builder_version=”4.25.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_fullwidth_header title=”Magnetic vacuum birefringence” text_orientation=”center” background_overlay_color=”rgba(0,0,0,0.2)” _builder_version=”4.27.4″ _module_preset=”default” background_image=”https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2024\/09\/BMV.jpeg” width=”100%” max_width=”100%” text_shadow_style=”preset3″ global_colors_info=”{}”][\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=”1″ disabled_on=”on|off|off” _builder_version=”4.26.0″ _module_preset=”default” overflow-x=”auto” sticky_position=”top” overflow-x_tablet=”auto” overflow-x_phone=”auto” overflow-x_last_edited=”on|phone” locked=”off” global_colors_info=”{}”][et_pb_row column_structure=”1_4,1_4,1_4,1_4″ disabled_on=”off|off|off” _builder_version=”4.26.0″ _module_preset=”default” sticky_position=”top” locked=”off” global_colors_info=”{}”][et_pb_column type=”1_4″ _builder_version=”4.26.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_button button_url=”#description” button_text=”Description” _builder_version=”4.27.2″ _module_preset=”default” custom_button=”on” button_text_size=”15px” global_colors_info=”{}”][\/et_pb_button][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.26.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_button button_url=”#personnel” button_text=”Staff” _builder_version=”4.27.4″ _module_preset=”default” custom_button=”on” button_text_size=”15px” global_colors_info=”{}”][\/et_pb_button][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.26.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_button button_url=”#techniques” button_text=”Techniques” _builder_version=”4.26.0″ _module_preset=”default” custom_button=”on” button_text_size=”15px” global_colors_info=”{}”][\/et_pb_button][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.26.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_button button_url=”#publications” button_text=”Publications” _builder_version=”4.27.0″ _module_preset=”default” custom_button=”on” button_text_size=”15px” global_colors_info=”{}”][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ module_id=”description” _builder_version=”4.27.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_row _builder_version=”4.25.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.25.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

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Description<\/h3>\n

Classical electrodynamics was modified in the early XXth century to take into account quantum mechanics, giving rise to quantum electrodynamics (QED). QED is currently the best tested theory in the world (with the measurements of the anomalous magnetic moment of the electron, the Lambshift, the Rydberg constant, the hydrogen hyperfine structure, etc.). Nevertheless, there exist phenomena predicted by this theory which yet eludes observation, such as the effect of optical non-linearity of vacuum, or more specifically the birefringence of vacuum in presence of a magnetic field. Vacuum birefringence is a minute effect, rendering its experimental measurement very challenging task. The principle of our experiment is to measure the ellipticity acquired by linearly polarized light travelling through vacuum in a region of intense magnetic field.<\/p>\n

A new set-up is ready employing a novel coil technology and coupled with a new high-performance optical set up.<\/p>\n

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Research staff<\/h3>\n

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\"BATTESTI<\/a><\/figure><\/div>

BATTESTI Remy<\/a><\/span><\/h3>
Professor<\/a><\/div>