{"id":148551,"date":"2024-04-27T16:45:05","date_gmt":"2024-04-27T16:45:05","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%ec%8a%a4%ed%80%b4%eb%93%9c-%ec%9e%90%ea%b8%b0%ea%b3%84\/"},"modified":"2024-04-27T16:45:05","modified_gmt":"2024-04-27T16:45:05","slug":"%ec%8a%a4%ed%80%b4%eb%93%9c-%ec%9e%90%ea%b8%b0%ea%b3%84","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ko\/%ec%8a%a4%ed%80%b4%eb%93%9c-%ec%9e%90%ea%b8%b0%ea%b3%84\/","title":{"rendered":"\uc2a4\ud034\ub4dc \uc790\uae30\uacc4"},"content":{"rendered":"<p class=\"sidekick\">\uc2a4\ud034\ub4dc \uc790\uae30\uacc4(SQUID magnetometer) \uae30\ucd08: \ucd08\uc804\ub3c4 \uc591\uc790 \uac04\uc12d \uc7a5\uce58\ub85c \ubbf8\uc138\ud55c \uc790\uae30\uc7a5 \uac10\uc9c0, \uc790\uae30 \uacf5\uba85 \uc601\uc0c1(MRI) \ub4f1\uc5d0 \ud65c\uc6a9.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2024\/04\/\uc2a4\ud034\ub4dc-\uc790\uae30\uacc4.png\" alt=\"\uc2a4\ud034\ub4dc \uc790\uae30\uacc4\"\/><\/p>\n<h2>\uc2a4\ud034\ub4dc \uc790\uae30\uacc4\uc758 \uae30\ucd08<\/h2>\n<p>\uc77c\uc0c1\uc5d0\uc11c \uc790\uc8fc \uc811\ud558\uc9c0\ub294 \uc54a\uc9c0\ub9cc, \uacfc\ud559\uacfc \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1\uc758 \ubc1c\uc804\uc5d0 \uc788\uc5b4 \uc2a4\ud034\ub4dc \uc790\uae30\uacc4(SQUID magnetometer)\ub294 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ub2f4\ub2f9\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. <strong>\uc2a4\ud034\ub4dc(SQUID)<\/strong>\ub294 &#8216;\ucd08\uc804\ub3c4 \uc591\uc790 \uac04\uc12d \uc7a5\uce58(Superconducting Quantum Interference Device)&#8217;\uc758 \uc57d\uc790\ub85c, \ub9e4\uc6b0 \ubbf8\uc138\ud55c \uc790\uae30\uc7a5\uc744 \uac10\uc9c0\ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \ubbfc\uac10\ud55c \uce21\uc815 \uc7a5\uce58\uc785\ub2c8\ub2e4.<\/p>\n<h2>\uc2a4\ud034\ub4dc\uc758 \uc6d0\ub9ac<\/h2>\n<p>\uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub294 \ucd08\uc804\ub3c4\uccb4\ub97c \uc774\uc6a9\ud558\uc5ec \uc544\uc8fc \uc57d\ud55c \uc790\uae30\uc7a5\uc744 \uce21\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ucd08\uc804\ub3c4\uccb4\ub294 \uc601\ud558\uc758 \uadf9\uc800\uc628\uc5d0\uc11c \uc804\uae30\uc800\ud56d\uc774 \uc0ac\ub77c\uc9c0\ub294 \ud2b9\ubcc4\ud55c \ubb3c\uc9c8\uc785\ub2c8\ub2e4. \uc774\ub7f0 \ud2b9\uc131 \ub355\ubd84\uc5d0 \ucd08\uc804\ub3c4 \uc0c1\ud0dc\uc5d0\uc11c\ub294 \uc804\uc790\uac00 \uc5d0\ub108\uc9c0 \uc190\uc2e4 \uc5c6\uc774 \ubb3c\uc9c8 \ub0b4\ub97c \ud750\ub97c \uc218 \uc788\uc73c\uba70, \uc774\ub97c \uc774\uc6a9\ud574 \ub9e4\uc6b0 \uadf9\uc18c\uc758 \uc790\uae30\uc7a5 \ubcc0\ud654\uae4c\uc9c0 \ud3ec\ucc29\ud560 \uc218 \uc788\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<p>\uc2a4\ud034\ub4dc\ub294 \ub450 \uac00\uc9c0 \uc8fc\uc694\ud55c \ubd80\ubd84\uc73c\ub85c \uad6c\uc131\ub429\ub2c8\ub2e4: &#8216;\uc870\uc149\uc2a8 \uc811\ud569(Josephson junction)&#8217; \uc774\ub77c \ubd88\ub9ac\ub294 \ucd08\uc804\ub3c4\uccb4\uc640 &#8216;\ucd08\uc804\ub3c4 \ub8e8\ud504(Superconducting loop)&#8217;\uc785\ub2c8\ub2e4. \uc870\uc149\uc2a8 \uc811\ud569\uc740 \ub450 \uac1c\uc758 \ucd08\uc804\ub3c4\uccb4 \uc0ac\uc774\uc5d0 \uc587\uc740 \uc808\uc5f0\uce35\uc744 \ub450\uc5b4 \ub9cc\ub4e4\uc5b4\uc9c0\uba70, \uc5ec\uae30\ub97c \ud750\ub974\ub294 \uc804\ub958\ub97c \uc870\uc808\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc811\ud569\uc744 \ud1b5\ud574\uc11c \ucd08\uc804\ub3c4\uccb4 \ub8e8\ud504 \uc548\uc73c\ub85c \uc77c\uc885\uc758 \uc591\uc790 \uc804\ub958(\ucfe0\ud37c \uc30d\uc73c\ub85c \uc774\ub8e8\uc5b4\uc9c4 \uc804\ub958)\uac00 \ud750\ub974\uac8c \ub418\ub294\ub370, \uc774 \uc804\ub958\ub294 \uc8fc\ubcc0\uc758 \uc790\uae30\uc7a5\uc5d0 \ub9e4\uc6b0 \ubbfc\uac10\ud558\uac8c \ubc18\uc751\ud569\ub2c8\ub2e4.<\/p>\n<h2>\uc790\uae30\uc7a5\uacfc \uc2a4\ud034\ub4dc\uc758 \uc0c1\ud638\uc791\uc6a9<\/h2>\n<p>\uc591\uc790\uc5ed\ud559\uc758 \uc6d0\ub9ac\uc5d0 \ub530\ub77c, \ucd08\uc804\ub3c4 \ub8e8\ud504\ub97c \ud1b5\ud574 \ud750\ub974\ub294 \uc804\ub958\ub294 &#8216;\uc591\uc790\ud654\ub41c \uc790\uc18d(quantized magnetic flux)&#8217;\uc744 \ud615\uc131\ud569\ub2c8\ub2e4. \uc774\ub294 \ub8e8\ud504\ub97c \ud1b5\uacfc\ud558\ub294 \uc804\uccb4 \uc790\uc18d\uc774 \ud50c\ub791\ud06c \uc0c1\uc218\uc640 \uc804\uc790\uc758 \uc804\ud558\uc5d0 \uad00\ub828\ub41c \ud2b9\uc815\ud55c \uac12\uc758 \ubc30\uc218\ub77c\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc2dd\uc73c\ub85c \ud45c\ud604\ud558\uba74, \uc804\uccb4 \uc790\uc18d <i>\u03a6<\/i>\ub294 &#8216;\uc790\uc18d \uc591\uc790(flux quantum)&#8217; <i>\u03a6<sub>0<\/sub><\/i>\uc758 \uc815\uc218\ubc30\ub85c \ub098\ud0c0\ub0bc \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<p>\\[ \u03a6 = n\u03a6_0 \\]<\/p>\n<p>\uc5ec\uae30\uc11c <i>n<\/i>\uc740 \uc815\uc218\uc774\uba70, <i>\u03a6<sub>0<\/sub><\/i>\ub294 <i>2.067833831 \u00d7 10<sup>-15<\/sup> Wb (weber)<\/i>\ub85c \uc815\uc758\ub429\ub2c8\ub2e4. \uc774 \ub54c, \uc790\uae30\uc7a5\uc758 \ubcc0\ud654\uac00 \ucd08\uc804\ub3c4 \ub8e8\ud504\ub97c \ud1b5\uacfc\ud558\ub294 \uc790\uc18d\uc744 \ubcc0\ud654\uc2dc\ud0a4\uba74, \uc774\ub294 \uc870\uc149\uc2a8 \uc811\ud569\uc744 \ud1b5\uacfc\ud558\ub294 \uc804\ub958\uc5d0 \uc601\ud5a5\uc744 \uc8fc\uace0, \uacb0\uad6d \uc811\ud569\uc5d0 \uac78\ub9ac\ub294 \uc804\uc555 \ubcc0\ud654\ub85c \ub098\ud0c0\ub0a9\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc804\uc555 \ubcc0\ud654\ub97c \uce21\uc815\ud568\uc73c\ub85c\uc368 \uc6b0\ub9ac\ub294 \uc8fc\ubcc0 \uc790\uae30\uc7a5\uc758 \ubcc0\ud654\ub97c \uac10\uc9c0\ud558\uace0 \uc591\uc744 \uacb0\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub294 \uadf8 \ubbfc\uac10\ub3c4\uac00 \ub9e4\uc6b0 \ub192\uae30 \ub54c\ubb38\uc5d0 <strong>\uc790\uae30 \uacf5\uba85 \uc601\uc0c1\ubc95(MRI)<\/strong>, \uc9c0\uc9c8 \ud0d0\uc0ac, \ubb3c\ub9ac \uc2e4\ud5d8\uc2e4\uc5d0\uc11c\uc758 \uc815\ubc00 \uc790\uae30\uce21\uc815 \ub4f1 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \uad11\ubc94\uc704\ud558\uac8c \uc0ac\uc6a9\ub418\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc7a5\uce58\ub4e4\uc740 \uc790\uc5f0\uacc4\uc758 \ubbf8\uc138\ud55c \uc790\uae30\uc801 \ud604\uc0c1\uc744 \ud3ec\ucc29\ud558\uc5ec \uc6b0\ub9ac\uac00 \ubcfc \uc218 \uc5c6\ub294 \uc138\uacc4\ub97c \ud0d0\ud5d8\ud560 \uc218 \uc788\uac8c \ud574 \uc90d\ub2c8\ub2e4.<\/p>\n<h2>\uc2a4\ud034\ub4dc \uc790\uae30\uacc4\uc758 \uc751\uc6a9<\/h2>\n<p>\uc2a4\ud034\ub4dc \uc790\uae30\uacc4\uc758 \ub180\ub77c\uc6b4 \uc815\ubc00\ub3c4\ub294 \uc758\ub8cc\ubd80\ud130 \ucc9c\ubb38\ud559\uae4c\uc9c0 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \ud65c\uc6a9\ub429\ub2c8\ub2e4. \uc608\ub97c\ub4e4\uc5b4, \ub1cc\uc758 \uc804\uae30\uc801 \ud65c\ub3d9\uc744 \ubaa8\ub2c8\ud130\ub9c1\ud558\ub294 <strong>\ub9c8\uadf8\ub124\ud1a0\uc5d4\uc149\ud3ec\ub85c\uadf8\ub798\ud53c(MEG)<\/strong>\uc5d0\uc11c\ub294 \uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub97c \uc774\uc6a9\ud558\uc5ec \ub1cc\uc758 \ubbf8\uc138\ud55c \uc790\uae30 \uc2e0\ud638\ub97c \uce21\uc815\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc2e0\uacbd\uacfc\ud559\uc790\ub4e4\uc740 \ub1cc\uc758 \uad6c\uc870\uc640 \uae30\ub2a5\uc5d0 \ub300\ud574 \ub354 \uae4a\uc774 \uc774\ud574\ud560 \uc218 \uc788\uace0, \uac04\uc9c8\uacfc \uac19\uc740 \ub1cc \uc9c8\ud658\uc758 \uc9c4\ub2e8\uc5d0 \uc911\uc694\ud55c \uc815\ubcf4\ub97c \uc81c\uacf5\ubc1b\uac8c \ub429\ub2c8\ub2e4.<\/p>\n<p>\ub610\ud55c, \uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub294 <strong>\uace0\uace0\ud559<\/strong> \ubd84\uc57c\uc5d0\uc11c\ub3c4 \uc0ac\uc6a9\ub418\uba70, \uace0\ub300 \uc720\uc801\uc774\ub098 \ub9e4\uc7a5\ubb38\ud654\uc7ac\uc758 \uc704\uce58\ub97c \uc790\uae30\uc7a5\uc758 \ucc28\uc774\ub97c \uc774\uc6a9\ud574 \ud0d0\uc9c0\ud569\ub2c8\ub2e4. \uc9c0\uad6c\uc758 \uc790\uae30\uc7a5\uc740 \uc2dc\uac04\uc5d0 \ub530\ub77c \ubcc0\ud654\ud558\uace0, \ub2e4\ub978 \ubb3c\uc9c8\uc740 \uc790\uae30\uc801\uc73c\ub85c \ub2e4\ub974\uac8c \ubc18\uc751\ud558\uae30 \ub54c\ubb38\uc5d0, \uace0\ub300 \uad6c\uc870\ubb3c\uc774\ub098 \uc720\ubb3c\ub4e4\uc774 \ub0a8\uae34 \ubbf8\uc138\ud55c \uc790\uae30\uc7a5\uc758 \ubcc0\ud654\ub97c \uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub97c \ud1b5\ud574 \ud0d0\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ucc9c\ubb38\ud559\uc5d0\uc11c\ub294 \uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub97c \ud65c\uc6a9\ud558\uc5ec <strong>\uc6b0\uc8fc\ubc30\uacbd\ubcf5\uc0ac<\/strong>\uc758 \uc790\uae30\uc801 \uc131\ubd84\uc744 \uce21\uc815\ud568\uc73c\ub85c\uc368 \uc6b0\uc8fc\uc758 \ucd08\uae30 \uc0c1\ud0dc\uc5d0 \ub300\ud55c \uc5f0\uad6c\ub97c \uc9c4\ud589\ud569\ub2c8\ub2e4. \uc774\ub294 \ube45\ubc45 \uc774\ub860\uc758 \uac80\uc99d \ubc0f \uc6b0\uc8fc\uc758 \uc9c4\ud654\uc5d0 \ub300\ud55c \uc774\ud574\ub97c \ub192\uc774\ub294 \ub370 \uae30\uc5ec\ud569\ub2c8\ub2e4.<\/p>\n<h2>\ubbf8\ub798 \uae30\uc220\uc5d0\uc758 \uae30\uc5ec<\/h2>\n<p>\ucd08\uc804\ub3c4 \uae30\uc220\uc758 \uc9c0\uc18d\uc801\uc778 \ubc1c\uc804\uc740 \uc2a4\ud034\ub4dc \uc790\uae30\uacc4\uc758 \uc131\ub2a5\uc744 \ub354\uc6b1 \ud5a5\uc0c1\uc2dc\ud0ac \uac83\uc785\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, <strong>\uc591\uc790\ucef4\ud4e8\ud130<\/strong>\uc758 \uac1c\ubc1c\uc5d0 \uc788\uc5b4\uc11c \uc2a4\ud034\ub4dc\ub294 \ub9e4\uc6b0 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud560 \uac83\uc73c\ub85c \ubcf4\uc785\ub2c8\ub2e4. \uc591\uc790\ucef4\ud4e8\ud305\uc740 \uc591\uc790\uc5ed\ud559\uc758 \uc6d0\ub9ac\ub97c \uc774\uc6a9\ud574 \uae30\uc874\uc758 \ucef4\ud4e8\ud130\ubcf4\ub2e4 \uc6d4\ub4f1\ud788 \ube60\ub978 \uacc4\uc0b0\uc744 \ud560 \uc218 \uc788\uc73c\uba70, \uc2a4\ud034\ub4dc \uae30\uc220\uc740 \uc591\uc790 \ube44\ud2b8(qubit)\uc758 \uc0c1\ud0dc\ub97c \uc815\ud655\ud558\uac8c \uc77d\uc5b4\ub0b4\ub294 \ub370 \uc0ac\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ub610\ud55c, <strong>\uc591\uc790 \uc554\ud638\ud654<\/strong> \ubd84\uc57c\uc5d0\uc11c\ub3c4 \uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub294 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud560 \uac83\uc73c\ub85c \uae30\ub300\ub429\ub2c8\ub2e4. \uc591\uc790 \uc554\ud638\ud654\ub294 \ud604\uc7ac\uc758 \uc554\ud638\ubcf4\ub2e4 \ud6e8\uc52c \uc548\uc804\ud55c \ud1b5\uc2e0\uc744 \uac00\ub2a5\ud558\uac8c \ud558\ub294 \uae30\uc220\uc774\uba70, \uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub294 \uc774\ub7ec\ud55c \uc548\uc804\ud55c \ud1b5\uc2e0 \uc2dc\uc2a4\ud15c \uad6c\ucd95\uc5d0 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\n<h2>\uacb0\ub860<\/h2>\n<p>\uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub294 \ubbf8\uc138\ud55c \uc790\uae30\uc7a5\uc744 \uce21\uc815\ud558\ub294 \ub370 \ud544\uc694\ud55c \ubbfc\uac10\ub3c4\uc640 \uc815\ubc00\ub3c4\ub97c \uac00\uc9c0\uace0 \uc788\uc5b4, \uc758\ud559, \uacfc\ud559, \uacf5\ud559 \ub4f1 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \ud601\uc2e0\uc801\uc778 \ubc1c\uc804\uc744 \uc774\ub044\ub294 \uae30\uc220\uc785\ub2c8\ub2e4. \uc774 \uc7a5\uce58\uac00 \uac00\ub2a5\ucf00 \ud558\ub294 \ubbf8\uc138\ud55c \uc790\uae30\uc801 \ud604\uc0c1\uc758 \uce21\uc815\uc740 \uc778\uac04\uc774 \uc790\uc5f0\uc744 \uc774\ud574\ud558\ub294 \ub2a5\ub825\uc744 \ud55c\uce35 \ub354 \ud5a5\uc0c1\uc2dc\ucf1c\uc904 \ubfd0\ub9cc \uc544\ub2c8\ub77c, \uc6b0\ub9ac \uc0dd\ud65c\uc758 \ub9ce\uc740 \ubd80\ubd84\uc5d0 \uc2e4\uc9c8\uc801\uc778 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4. \uc9c0\uc18d\uc801\uc778 \uc5f0\uad6c\uc640 \uae30\uc220 \uac1c\ubc1c\uc744 \ud1b5\ud574, \uc2a4\ud034\ub4dc \uc790\uae30\uacc4\ub294 \ubbf8\ub798\uc5d0 \ub354 \ub9ce\uc740 \ud601\uc2e0\uc801 \ubc1c\uacac\uacfc \uc751\uc6a9\uc744 \uac00\ub2a5\ud558\uac8c \ud560 \uac83\uc774\uba70, \uc774\ub294 \uacfc\ud559\uacfc \uae30\uc220\uc758 \ubbf8\ub798\uc5d0 \uc788\uc5b4 \ub9e4\uc6b0 \ud765\ubbf8\uc9c4\uc9c4\ud55c \uc804\ub9dd\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uc791\uc740 \ubbf8\uc2dc \uc138\uacc4\uc758 \ud0d0\ud5d8\uc774 \uc778\ub958\uc758 \uac70\uc2dc \uc138\uacc4\uc758 \uc774\ud574\ub97c \ud655\uc7a5\uc2dc\ud0a4\ub294 \uacc4\uae30\uac00 \ub420 \uac83\uc785\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc2a4\ud034\ub4dc 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