\n \uc5bd\ud78c \uad11\uc790 \uc30d\uc744 \uc0dd\uc131\ud558\ub294 \uc18c\uc2a4\uc5d0\uc11c \ucd9c\ubc1c\ud55c \ub450 \uad11\uc790\ub294 \uac01\uac01 Alice\uc640 Bob\uc758 \ub450 \ucc44\ub110\n \ud3b8\uad11\uc790\uc5d0 \ub3c4\ub2ec\ud558\uace0, \ud3b8\uad11\uc790\ub294 \uad11\uc790\ub97c +1 \ub610\ub294 \u22121 \uacbd\ub85c\ub85c \ubd84\ub9ac\ud574 \uac80\ucd9c\uae30\ub85c\n \uc804\ub2ec\ud55c\ub2e4. \ub450 \uce21\uc815\uc790\ub294 \ub3c5\ub9bd\uc801\uc73c\ub85c \uce21\uc815 \uac01\ub3c4\ub97c \uc120\ud0dd\ud558\uba70, \uac80\ucd9c\uae30\ub294 \uac01 \uacb0\uacfc\ub97c\n \ub3d9\uc2dc\uc131 \ubaa8\ub2c8\ud130\uc5d0 \uae30\ub85d\ud558\uc5ec \ud55c \uc30d\uc758 \uad11\uc790\uc5d0\uc11c \ub098\uc628 \uc2e0\ud638\uac00 \uc0c1\uad00\uacc4\uc218 \ubd84\uc11d\uc5d0\n \uc0ac\uc6a9\ub41c\ub2e4. \uc18c\uc2a4\uac00 \ub9cc\ub4e4\uc5b4\ub0b8 \uc5bd\ud78c \uad11\uc790\uc30d\uc740 \ub9c8\uce58 \ubcf4\uc774\uc9c0 \uc54a\ub294 \ub048\uc73c\ub85c \uc5f0\uacb0\ub41c \ub450\n \uc874\uc7ac\ucc98\ub7fc, Alice\uc640 Bob\uc774 \uc544\ubb34\ub9ac \uba40\ub9ac \ub5a8\uc5b4\uc838 \uc788\uc5b4\ub3c4 \ud55c\ucabd\uc758 \uce21\uc815\uc774 \uc774\ub8e8\uc5b4\uc9c0\ub294\n \uc21c\uac04 \ub2e4\ub978 \ucabd\uc758 \uc0c1\ud0dc\uac00 \uacb0\uc815\ub418\ub294 \ube44\uad6d\uc18c\uc801 \uc0c1\uad00\uc744 \ub4dc\ub7ec\ub0b8\ub2e4. \ubca8 \ud14c\uc2a4\ud2b8\ub294 \uc774\n \uc0c1\uad00\uc758 \uac15\ub3c4\ub97c \uc815\ub7c9\uc801\uc73c\ub85c \uce21\uc815\ud558\uba70, \uc6b0\uc5f0 \uc77c\uce58 \ubaa8\ub2c8\ud130\uac00 \uc218\uc9d1\ud55c \ud1b5\uacc4\uc801 \ub370\uc774\ud130\ub294\n \uace0\uc804\uc801 \uad6d\uc18c\uc2e4\uc7ac\ub860\uc774 \uc124\uba85\ud560 \uc218 \uc5c6\ub294 \uc591\uc790 \uc138\uacc4\uc758 \uad6c\uc870\ub97c \ub4dc\ub7ec\ub0b4\ub294 \uac1d\uad00\uc801 \uadfc\uac70\ub85c\n \uc0ac\uc6a9\ub41c\ub2e4.(\uc774\ubbf8\uc9c0 \ucd9c\ucc98: \uc704\ud0a4\ud53c\ub514\uc544 \uc790\uc720\ub77c\uc774\uc120\uc2a4)\n <\/p>\n
\n<\/div>\n
1. \ubca8 \ubd80\ub4f1\uc2dd\uc5d0 \ub300\ud55c \uc124\uba85<\/h3><\/b>\n\n
\n \ubca8 \ubd80\ub4f1\uc2dd(Bell’s Inequality)\uc740 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860(Local Realism)\uc744 \ub530\ub974\ub294 \uace0\uc804\n \ubb3c\ub9ac\ud559\uc758 \uc608\uce21\uacfc \uc591\uc790 \uc5ed\ud559\uc758 \uc608\uce21\uc744 \uc2e4\ud5d8\uc801\uc73c\ub85c \uad6c\ubcc4\ud558\uae30 \uc704\ud574 \ubb3c\ub9ac\ud559\uc790 \uc874\n \uc2a4\ud29c\uc5b4\ud2b8 \ubca8(John Stewart Bell)\uc774 1964\ub144\uc5d0 \uc720\ub3c4\ud55c \uc218\ud559\uc801 \ubd80\ub4f1\uc2dd\uc774\ub2e4. \uc774\ub294 \uc591\uc790\n \uc5ed\ud559\uc758 \uac00\uc7a5 \uadfc\ubcf8\uc801\uc774\uace0 \uc5ed\uc124\uc801\uc778 \ud2b9\uc9d5 \uc911 \ud558\ub098\uc778 \ube44\uad6d\uc18c\uc131\uc744 \uc774\ud574\ud558\ub294 \ub370 \uacb0\uc815\uc801\uc778\n \uc5ed\ud560\uc744 \ud588\ub2e4.\n<\/p>\n\n
\n \ubca8 \ubd80\ub4f1\uc2dd\uc740 \ub2e4\uc74c\uc758 \ub450 \uac00\uc9c0 \ud575\uc2ec \uac00\uc815, \uc989 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc758 \ud2c0 \ub0b4\uc5d0\uc11c \ub3c4\ucd9c\ub41c\ub2e4.\n<\/p>\n\n
\n (1) \uc2e4\uc7ac\ub860: \uce21\uc815\ub418\uae30 \uc774\uc804\uc5d0\ub3c4 \uc785\uc790\ub4e4\uc740 \uc774\ubbf8 \ud2b9\uc815 \uc0c1\ud0dc\ub098 \uc18d\uc131(\uc228\uc740 \ubcc0\uc218)\uc744\n \uac00\uc9c0\uace0 \uc788\uc73c\uba70, \uc774 \uc18d\uc131\ub4e4\uc774 \uce21\uc815 \uacb0\uacfc\ub97c \uacb0\uc815\ud55c\ub2e4\ub294 \uac00\uc815\uc774\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub3d9\uc804\uc740\n \ub358\uc9c0\uae30 \uc804\uc5d0 \uc774\ubbf8 ‘\uc55e\uba74’ \ub610\ub294 ‘\ub4b7\uba74’\uc774\ub77c\ub294 \uc0c1\ud0dc\ub97c \uac00\uc9c0\uace0 \uc788\ub2e4\ub294 \uace0\uc804\uc801\uc778\n \uad00\uc810\uc774\ub2e4.\n<\/p>\n
\n (2) \uad6d\uc18c\uc131: \ube5b\uc758 \uc18d\ub3c4\ubcf4\ub2e4 \ube60\ub974\uac8c \uc815\ubcf4\uac00 \uc804\ub2ec\ub420 \uc218 \uc5c6\ub2e4\ub294 \uc544\uc778\uc288\ud0c0\uc778\uc758\n \ud2b9\uc218\uc0c1\ub300\uc131\uc774\ub860\uc5d0 \uae30\ubc18\ud558\uba70, \uba40\ub9ac \ub5a8\uc5b4\uc9c4 \ub450 \uc7a5\uc18c\uc5d0\uc11c \uc774\ub8e8\uc5b4\uc9c0\ub294 \uce21\uc815\uc740 \uc11c\ub85c\uc5d0\uac8c\n \uc989\uac01\uc801\uc778 \uc601\ud5a5\uc744 \ubbf8\uce60 \uc218 \uc5c6\ub2e4\ub294 \uac00\uc815\uc774. \ud55c \uc7a5\uc18c\uc5d0\uc11c\uc758 \uce21\uc815\uc774 \ub2e4\ub978 \uc7a5\uc18c\uc758\n \uc2e4\uc7ac\ub860\uc801 \uc18d\uc131\uc744 \uc989\uc2dc \ubcc0\ud654\uc2dc\ud0a4\uc9c0\ub294 \ubabb\ud55c\ub2e4\ub294 \uc758\ubbf8\uc774\ub2e4.\n<\/p>\n\n
\n \ubca8\uc740 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc758 \uac00\uc815\uc744 \ubc14\ud0d5\uc73c\ub85c, \uba40\ub9ac \ub5a8\uc5b4\uc9c4 \ub450 \uac1c\uc758 \uc5bd\ud78c(entangled)\n \uc785\uc790\uc758 \ud2b9\uc815 \uc18d\uc131\ub4e4(\uc608: \uc2a4\ud540 \ub610\ub294 \ud3b8\uad11)\uc744 \uce21\uc815\ud588\uc744 \ub54c, \uadf8 \uce21\uc815 \uacb0\uacfc\uc758 \ud1b5\uacc4\uc801\n \uc0c1\uad00\uad00\uacc4\uac00 \ub9cc\uc871\ud574\uc57c \ud558\ub294 \uc218\ud559\uc801 \uad00\uacc4\ub97c \uc720\ub3c4\ud588\ub2e4. \uc774\uac83\uc774 \ubc14\ub85c \ubca8 \ubd80\ub4f1\uc2dd\uc774\ub2e4.\n<\/p>\n\n
\n \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc774 \ucc38\uc774\ub77c\uba74, \ud2b9\uc815 \uc0c1\uad00\uad00\uacc4 \uac12 $S$\ub294 \ud56d\uc0c1 $\\mathbf{|S| \\le 2}$\n (\ub610\ub294 \uae30\ud0c0 \uc0c1\uc218)\ub97c \ub9cc\uc871\ud574\uc57c \ud55c\ub2e4. \uc774 \ubd80\ub4f1\uc2dd\uc740 \uc228\uc740 \ubcc0\uc218 \uc774\ub860\uc73c\ub85c \uc124\uba85\ud560 \uc218\n \uc788\ub294 \ucd5c\ub300 \uc0c1\uad00\uad00\uacc4\ub97c \ub098\ud0c0\ub0b8\ub2e4.\n<\/p>\n\n
\n \uc774\ud6c4 \uc54c\ub7ad \uc544\uc2a4\ud399(Alain Aspect)\ub4f1\uc758 \ubb3c\ub9ac\ud559\uc790\ub4e4\uc5d0 \uc758\ud574 \ubca8 \ubd80\ub4f1\uc2dd\uc744 \uac80\uc99d\ud558\ub294\n \uc77c\ub828\uc758 \uc2e4\ud5d8\uc774 \uc218\ud589\ub418\uc5c8\ub2e4. \uc774 \uc2e4\ud5d8\ub4e4\uc5d0\uc11c \uc5bd\ud78c \uad11\uc790 \uc30d\uc758 \uce21\uc815 \uacb0\uacfc\ub97c \ubd84\uc11d\ud55c\n \uacb0\uacfc, \uce21\uc815\ub41c \uc0c1\uad00\uad00\uacc4 \uac12 $\\mathbf{S}$\ub294 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc774 \uc608\uce21\ud558\ub294 \ud55c\uacc4\uc778 2\ub97c\n \ucd08\uacfc\ud558\uc5ec \uc591\uc790 \uc5ed\ud559\uc774 \uc608\uce21\ud558\ub294 \uac12($\\mathbf{|S| > 2}$ \ub610\ub294 $\\mathbf{|S| \\le\n 2\\sqrt{2} \\approx 2.828}$)\uc5d0 \ub9e4\uc6b0 \uac00\uae5d\uac8c \ub098\uc654\ub2e4.\n<\/p>\n\n
\n \uc774 \uc2e4\ud5d8 \uacb0\uacfc\ub294 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc758 \uac00\uc815\uc774 \ud2c0\ub838\uc74c\uc744 \uba85\ud655\ud788 \ubcf4\uc5ec\uc900\ub2e4. \uc989, \uc591\uc790\n \uc5ed\ud559\uc774 \uc633\ub2e4\uba74, \uc785\uc790\ub4e4\uc740 \uce21\uc815\ub418\uae30 \uc804\uc5d0 \uc774\ubbf8 \uc815\ud574\uc9c4 \uc18d\uc131(\uc2e4\uc7ac\ub860)\uc744 \uac00\uc9c0\uace0 \uc788\uc9c0\n \uc54a\uac70\ub098, \ub610\ub294 \uc544\ubb34\ub9ac \uba40\ub9ac \ub5a8\uc5b4\uc838 \uc788\uc5b4\ub3c4 \ube5b\ubcf4\ub2e4 \ube60\ub974\uac8c \uc601\ud5a5\uc744 \uc8fc\uace0\ubc1b\ub294 \uac83\ucc98\ub7fc\n \ubcf4\uc774\ub294 \ube44\uad6d\uc18c\uc131(Non-locality)\uc774 \uc874\uc7ac\ud568\uc744 \uc758\ubbf8\ud55c\ub2e4.\n<\/p>\n\n
\n \ubca8 \ubd80\ub4f1\uc2dd\uc758 \uc2e4\ud5d8\uc801 \uc704\ubc30\ub294 \uc591\uc790 \uc5ed\ud559\uc758 \ube44\uad6d\uc18c\uc801 \ud2b9\uc131, \ud2b9\ud788 \uc591\uc790 \uc5bd\ud798 \ud604\uc0c1\uc774\n \uace0\uc804\uc801\uc778 \ubb3c\ub9ac \uac1c\ub150\uc73c\ub85c\ub294 \uc124\uba85\ub420 \uc218 \uc5c6\ub294 \uadfc\ubcf8\uc801\uc778 \ud604\uc0c1\uc784\uc744 \uc785\uc99d\ud558\ub294 \uac00\uc7a5 \uac15\ub825\ud55c\n \uacbd\ud5d8\uc801 \uadfc\uac70\ub85c \ud655\ub9bd\ub418\uc5c8\ub2e4.\n<\/p>\n
\n
2. \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\uc5d0 \ub300\ud55c \uc124\uba85<\/b><\/h3>\n\n
\n \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\ub780, \uba40\ub9ac \ub5a8\uc5b4\uc9c4 \ub450 \uac1c\uc758 \uc785\uc790\uc5d0 \ub300\ud574 \uac1c\ubcc4\uc801\uc73c\ub85c \uc218\ud589\ud55c \uce21\uc815\n \uacb0\uacfc\ub4e4\uc774 \uc11c\ub85c \uc5bc\ub9c8\ub098 \uc5f0\uad00\ub418\uc5b4 \uc788\ub294\uc9c0\ub97c \uc218\uce58\uc801\uc73c\ub85c \ub098\ud0c0\ub0b4\ub294 \uc815\ub3c4\ub97c \uc758\ubbf8\ud55c\ub2e4.\n \ud2b9\ud788 \ubca8 \ubd80\ub4f1\uc2dd\uc758 \uc601\uc5ed\uc5d0\uc11c\ub294 \uc774 \uc0c1\uad00\uad00\uacc4\uac00 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc758 \ud55c\uacc4\ub97c \ucd08\uc6d4\ud558\ub294 \uc591\uc790\n \uc5ed\ud559\uc801 \ud2b9\uc131, \uc989 \uc591\uc790 \uc5bd\ud798\uc744 \uac1d\uad00\uc801\uc73c\ub85c \uc785\uc99d\ud558\ub294 \ud575\uc2ec \uc9c0\ud45c\uac00 \ub41c\ub2e4.\n<\/p>\n\n
\n 2-1. \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\uc758 \uae30\ubcf8 \uc815\uc758\n<\/h5>\n\n
\n \ud1b5\uacc4\ud559\uc5d0\uc11c \uc0c1\uad00\uad00\uacc4\ub294 \ub450 \ubcc0\uc218 $A$\uc640 $B$\uac00 \uc5bc\ub9c8\ub098 \uc120\ud615\uc801\uc778 \uad00\uacc4\ub97c \uac00\uc9c0\uace0\n \uc6c0\uc9c1\uc774\ub294\uc9c0\ub97c \ub098\ud0c0\ub0b8\ub2e4.\n<\/p>\n\n
\n (1)\uc591\uc758 \uc0c1\uad00\uad00\uacc4 (+1\uc5d0 \uac00\uae4c\uc6c0): $A$\uc758 \uac12\uc774 \uc99d\uac00\ud560 \ub54c $B$\uc758 \uac12\ub3c4 \ud568\uaed8 \uc99d\uac00\ud558\ub294\n \uacbd\ud5a5\uc744 \ubcf4\uc778\ub2e4.\n<\/p>\n
\n (2)\uc74c\uc758 \uc0c1\uad00\uad00\uacc4 (-1\uc5d0 \uac00\uae4c\uc6c0): $A$\uc758 \uac12\uc774 \uc99d\uac00\ud560 \ub54c $B$\uc758 \uac12\uc740 \uac10\uc18c\ud558\ub294\n \uacbd\ud5a5\uc744 \ubcf4\uc778\ub2e4.\n<\/p>\n
(3)\uc0c1\uad00 \uc5c6\uc74c(0\uc5d0 \uac00\uae4c\uc6c0): $A$\uc640 $B$ \uc0ac\uc774\uc5d0 \ud1b5\uacc4\uc801\uc778 \uc5f0\uad00\uc131\uc774 \uac70\uc758 \uc5c6\ub2e4.<\/p>\n\n
\n 2-2. \ubca8 \ud14c\uc2a4\ud2b8\uc5d0\uc11c \uc801\uc6a9 (\uc5bd\ud798 \uc785\uc790\uc758 \uacbd\uc6b0)\n<\/h5>\n\n
\ubca8 \ubd80\ub4f1\uc2dd \uc2e4\ud5d8\uc5d0\uc11c\ub294 \uc774 \uc0c1\uad00\uad00\uacc4\ub97c \uc5bd\ud78c \uc785\uc790 \uc30d\uc5d0 \uc801\uc6a9\ud55c\ub2e4.<\/p>\n\n
\n (1) \ub450 \ubcc0\uc218 ($A, B$): \uc5bd\ud78c \ub450 \uc785\uc790 (\uc608: \uad11\uc790 1, \uad11\uc790 2)\ub97c \uc11c\ub85c \uba40\ub9ac \ub5a8\uc5b4\uc9c4 \ub450\n \uc7a5\uc18c(\uc11c\uc6b8, \ub274\uc695)\ub85c \ubcf4\ub0b8\ub2e4. $A$\ub294 \uc11c\uc6b8\uc774 \uad11\uc790 1\uc5d0 \ub300\ud574 \uce21\uc815\ud55c \uacb0\uacfc\uc774\uba70, $B$\ub294\n \ub274\uc695\uc774 \uad11\uc790 2\uc5d0 \ub300\ud574 \uce21\uc815\ud55c \uacb0\uacfc\uc774\ub2e4.\n<\/p>\n
\n (2) \uce21\uc815 \ud56d\ubaa9: \ubcf4\ud1b5 \uc785\uc790\uc758 \uc2a4\ud540(Spin)\uc774\ub098 \ud3b8\uad11(Polarization) \uac19\uc740 \uc774\uc9c4(Binary)\n \uc18d\uc131\uc744 \uce21\uc815\ud55c\ub2e4. \uce21\uc815 \uacb0\uacfc\ub294 $+1$ \ub610\ub294 $-1$\uacfc \uac19\uc774 \ub450 \uac00\uc9c0 \uac12\uc73c\ub85c\ub9cc \ub098\uc628\ub2e4.\n<\/p>\n
\n (3) \uc0c1\uad00 \uacc4\uc218 ($E$): \uc218\ub9ce\uc740 \uce21\uc815 \uc30d\uc744 \ubc18\ubcf5\ud558\uc5ec \uc5bb\uc740 \uacb0\uacfc\ub97c \uc885\ud569\ud558\uc5ec \uc0c1\uad00\n \uacc4\uc218($E$)\ub97c \uacc4\uc0b0\ud55c\ub2e4. \uc774 $E$ \uac12\uc740 \ub450 \uce21\uc815 \uacb0\uacfc $A$\uc640 $B$\uac00 \uac19\uc740 \uac12\uc744 \uac00\uc9c8\n \ud655\ub960\uacfc \ub2e4\ub978 \uac12\uc744 \uac00\uc9c8 \ud655\ub960\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub2e4\uc74c\uacfc \uac19\uc774 \uc815\uc758\ub418\ub294 \uae30\ub313\uac12\uc758 \ud615\ud0dc\ub97c\n \ucde8\ud55c\ub2e4.\n<\/p>\n\n
$\\mathbf{E(\\theta_A, \\theta_B)} = P(A=B) – P(A \\ne B)$<\/p>\n\n
\n \uc5ec\uae30\uc11c $P(A=B)$\ub294 \ub450 \uce21\uc815 \uacb0\uacfc\uac00 \uc77c\uce58\ud560 \ud655\ub960\uc774\uace0, $P(A \\ne B)$\ub294 \ubd88\uc77c\uce58\ud560\n \ud655\ub960\uc774\ub2e4.\n<\/p>\n\n
\n \ub9cc\uc57d \ubaa8\ub4e0 \uce21\uc815 \uc30d\uc774 \uc644\ubcbd\ud558\uac8c \uc77c\uce58\ud55c\ub2e4\uba74(\uc644\ubcbd\ud55c \uc0c1\uad00), $\\mathbf{E = +1}$\uc774\n \ub41c\ub2e4. \ub9cc\uc57d \ubaa8\ub4e0 \uce21\uc815 \uc30d\uc774 \uc644\ubcbd\ud558\uac8c \ubc18\ub300\ub41c\ub2e4\uba74(\uc644\ubcbd\ud55c \ubc18-\uc0c1\uad00), $\\mathbf{E =\n -1}$\uc774 \ub41c\ub2e4.\n<\/p>\n\n
\n 2-3. \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\uc640 \ubca8 \ubd80\ub4f1\uc2dd\uc758 \uad00\uacc4\n<\/h5>\n\n
\n \ubca8 \ubd80\ub4f1\uc2dd\uc740 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc758 \uad00\uc810\uc5d0\uc11c \uc774 \uc0c1\uad00 \uacc4\uc218 $E$\ub97c \ud3ec\ud568\ud558\ub294 \uc870\ud569(\uc8fc\ub85c $S$\n \uac12)\uc774 \uac00\uc9c8 \uc218 \uc788\ub294 \ucd5c\ub300 \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\uc758 \ud55c\ub3c4\ub97c \uc124\uc815\ud55c\ub2e4.\n<\/p>\n\n
\n $\\displaystyle S = E(\\theta_1, \\theta_2) – E(\\theta_1, \\theta_3) + E(\\theta_2,\n \\theta_4)$
\n $+ E(\\theta_3, \\theta_4) \\displaystyle |S| \\le 2$\n
(CHSH \ubca8 \ubd80\ub4f1\uc2dd\uc758 \uc77c\ubc18\uc801 \ud615\ud0dc)\n<\/p>\n\n
\n (1)\uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc758 \uc608\uce21: \uace0\uc804\uc801\uc778 \uc228\uc740 \ubcc0\uc218 \uc774\ub860\uc744 \ub530\ub97c \uacbd\uc6b0, \ub450 \uc785\uc790 \uce21\uc815\n \uacb0\uacfc\uc758 \uc0c1\uad00\uad00\uacc4 \uac12 $\\mathbf{|S|}$\ub294 \uc808\ub300 2\ub97c \ub118\uc744 \uc218 \uc5c6\ub2e4. \uc774\ub294 \uc544\ubb34\ub9ac \uc5bd\ud798\uc774\n \uac15\ud574\ub3c4, \ub450 \uc785\uc790\uac00 \ub3c5\ub9bd\uc801\uc778 \uad6d\uc18c\uc801 \uc18d\uc131(\uc228\uc740 \ubcc0\uc218)\uc744 \uac00\uc9c0\uace0 \uc788\uae30 \ub54c\ubb38\uc5d0 \uac00\ub2a5\ud55c\n \ucd5c\ub300 \uc5f0\uad00\uc131\uc5d0 \ud1b5\uacc4\uc801 \uc81c\uc57d\uc774 \uac78\ub9ac\uae30 \ub54c\ubb38\uc774\ub2e4.\n<\/p>\n\n
\n (2)\uc591\uc790 \uc5ed\ud559\uc758 \uc608\uce21: \uc591\uc790 \uc5ed\ud559\uc758 \uc5bd\ud798(Entanglement) \ud604\uc0c1\uc740 \ub450 \uc785\uc790\uac00 \uad6d\uc18c\uc801\uc778\n \uc18d\uc131\uc744 \uac00\uc9c0\uace0 \uc788\uc9c0 \uc54a\uc73c\uba70, \uce21\uc815 \uc21c\uac04\uc5d0 \uc989\uac01\uc801\uc778 \ube44\uad6d\uc18c\uc801 \uc5f0\uad00\uc131\uc744 \uacf5\uc720\ud558\uae30\n \ub54c\ubb38\uc5d0, \ub450 \uce21\uc815 \uacb0\uacfc\uc758 \uc0c1\uad00\uad00\uacc4\ub294 \uace0\uc804\uc801 \ud55c\uacc4\ub97c \uc704\ubc30\ud558\uc5ec \ucd5c\ub300 $\\mathbf{|S|\n \\approx 2.828}$ ($\\mathbf{2\\sqrt{2}}$)\uae4c\uc9c0 \uac15\ud574\uc9c8 \uc218 \uc788\ub2e4\uace0 \uc608\uce21\ud55c\ub2e4.\n<\/p>\n\n
\n \uc2e4\uc81c \uc2e4\ud5d8\uc5d0\uc11c $|S| > 2$\ub77c\ub294 \uacb0\uacfc\uac00 \ubc18\ubcf5\uc801\uc73c\ub85c \ud655\uc778\ub428\uc73c\ub85c\uc368, \uc591\uc790 \uc5bd\ud798\uc774\n \uace0\uc804 \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\uc758 \ud55c\uacc4\ub97c \ucd08\uc6d4\ud558\ub294 \ube44\uad6d\uc18c\uc801 \ud604\uc0c1\uc784\uc744 \uac1d\uad00\uc801\uc778 \uadfc\uac70\ub85c\n \uc785\uc99d\ud55c \uac83\uc774\ub2e4.\n<\/p>\n\n
3. \uad11\uc790 \uc30d\uc758 \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\uc640 \uc815\ubcf4\uc758 \uad00\uacc4<\/b><\/h3>\n\n
\n \ubca8 \ubd80\ub4f1\uc2dd \uc2e4\ud5d8\uc5d0\uc11c \uce21\uc815\ud558\ub294 \uad11\uc790 \uc30d\uc758 \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\ub294 \ub2e8\uc21c\ud788 \uc218\ud559\uc801\uc778\n \uc5f0\uad00\uc131\uc744 \ub118\uc5b4, \ub450 \uad11\uc790\uac00 \uacf5\uc720\ud558\ub294 \uc591\uc790 \uc0c1\ud0dc\uc5d0 \uae30\ub85d\ub41c \uc815\ubcf4\uc758 \uc0c1\uad00\uad00\uacc4\ub97c\n \ub098\ud0c0\ub0b8\ub2e4. \ub2e4\ub9cc, \uc5ec\uae30\uc11c\uc758 ‘\uc815\ubcf4’\ub294 \uace0\uc804\uc801\uc778 \uc758\ubbf8\uc758 \uc815\ubcf4\uc640\ub294 \uad6c\ubcc4\ub418\ub294 \uc591\uc790\n \uc5ed\ud559\uc801 \uc815\ubcf4\ub77c\ub294 \uc810\uc774 \uc911\uc694\ud558\ub2e4.\n<\/p>\n\n
3-1. \uc591\uc790 \uc5bd\ud798\uacfc \uc815\ubcf4 \uacf5\uc720<\/h5>\n\n
\ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\uac00 \uce21\uc815\ud558\ub294 \ud575\uc2ec \ub300\uc0c1\uc740 \ub450 \uad11\uc790\uc758 \uc591\uc790 ‘\uc5bd\ud798 \uc0c1\ud0dc’\uc774\ub2e4.<\/p>\n\n
\n (1)\uc5bd\ud798 \uc0c1\ud0dc\uc758 \uc758\ubbf8: \uc5bd\ud78c \uad11\uc790 \uc30d\uc740 \uac1c\ubcc4\uc801\uc73c\ub85c\ub294 \ud3b8\uad11 \uc0c1\ud0dc\uac00 \ud655\uc815\ub418\uc5b4 \uc788\uc9c0\n \uc54a\uc9c0\ub9cc, \uc30d \uc804\uccb4\ub85c \ubcfc \ub54c \ud558\ub098\uc758 \ud1b5\uc77c\ub41c \uc591\uc790 \uc0c1\ud0dc\ub85c \uc874\uc7ac\ud558\uba70, \ub450 \uc785\uc790\uc758 \uc18d\uc131\n \uc0ac\uc774\uc5d0 \uc644\ubcbd\ud55c \uc5f0\uad00\uc131\uc774 \uc874\uc7ac\ud55c\ub2e4.\n<\/p>\n
\n (2)\uc815\ubcf4\uc758 \uc0c1\uad00\uad00\uacc4: \uc774\ub294 \ub450 \uc785\uc790\uac00 \uc11c\ub85c\uc5d0 \ub300\ud55c ‘\uc815\ubcf4’\ub97c \uacf5\uc720\ud558\uace0 \uc788\uc74c\uc744\n \uc758\ubbf8\ud55c\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub450 \uad11\uc790 \uc30d\uc758 \uc804\uccb4 \uc2a4\ud540 \ud569\uc774 0\uc774\ub77c\uace0 \uacb0\uc815\ub418\uc5b4 \uc788\ub2e4\uba74,\n \uc11c\uc6b8\uc774 \uc790\uc2e0\uc758 \uad11\uc790 \uc2a4\ud540\uc744 ‘\uc704($+1$)’\ub85c \uce21\uc815\ud558\ub294 \uc21c\uac04, \ub274\uc695\uc758 \uad11\uc790\ub294 \uc989\uc2dc\n ‘\uc544\ub798($-1$)’\ub77c\ub294 \uc815\ubcf4\ub97c \uac00\uc9c0\uac8c \ub41c\ub2e4.\n<\/p>\n\n
3-2. \ud30c\ub3d9\uacfc \uc815\ubcf4 \uae30\ub85d<\/h5>\n\n
\uc591\uc790 \uc5ed\ud559\uc5d0\uc11c \uc785\uc790\uc758 \uc815\ubcf4\ub294 \ud30c\ub3d9 \ud568\uc218($\\psi$)\uc5d0 \uae30\ub85d\ub418\uc5b4 \uc788\ub2e4.<\/p>\n\n
\n \uc591\uc790 \uc0c1\ud0dc\uc758 \uae30\ub85d: \uc5bd\ud78c \uad11\uc790 \uc30d\uc758 \ud30c\ub3d9 \ud568\uc218\ub294 \ub450 \uc785\uc790\uc758 \uc0c1\ud0dc\ub97c \ubd84\ub9ac \ubd88\uac00\ub2a5\ud55c\n \ub2e8\uc77c \ubc29\uc815\uc2dd\uc73c\ub85c \uae30\uc220\ud55c\ub2e4.\n<\/p>\n
\n \ubca8 \ubd80\ub4f1\uc2dd \uc2e4\ud5d8\uc5d0\uc11c \uad00\ucc30\ub418\ub294 \ube44\uace0\uc804\uc801\uc778 \uac15\ud55c \uc0c1\uad00\uad00\uacc4(\uc989, $S > 2$)\ub294 \uc774 \uc5bd\ud78c\n \ud30c\ub3d9 \ud568\uc218\uac00 \uace0\uc804\uc801\uc778 \ud655\ub960 \ubd84\ud3ec(\uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860)\uac00 \ud5c8\uc6a9\ud558\ub294 \ud55c\uacc4\ub97c \ucd08\uc6d4\ud558\uc5ec \ub450\n \uc785\uc790 \uc0c1\ud0dc\uac00 \uc644\ubcbd\ud558\uac8c \uc5f0\uad00\ub418\ub3c4\ub85d \uac15\uc81c\ud55c\ub2e4\ub294 \uac1d\uad00\uc801 \uadfc\uac70\ub97c \uc81c\uc2dc\ud55c\ub2e4.\n<\/p>\n\n
\n 3-3. \uace0\uc804\uc801 \uc815\ubcf4\uc640 \uc591\uc790\uc801 \uc815\ubcf4\uc758 \ucc28\uc774\n<\/h5>\n\n
\uc774 \uc0c1\uad00\uad00\uacc4\uac00 \uace0\uc804 \ubb3c\ub9ac\ud559\uc758 \uc0c1\uad00\uad00\uacc4\uc640 \uad6c\ubcc4\ub418\ub294 \uc9c0\uc810\uc740 \ubc14\ub85c \ube44\uad6d\uc18c\uc131\uc774\ub2e4.<\/p>\n\n
\n \uace0\uc804\uc801 \uc0c1\uad00\uad00\uacc4 (\uc228\uc740 \ubcc0\uc218)\ub294 \ub450 \ub3d9\uc804\uc774 \ub358\uc838\uc9c0\uae30 \uc804\uc5d0 \uc774\ubbf8 \uc11c\ub85c \ub2e4\ub978 \uba74\uc774\n \ub098\uc624\ub3c4\ub85d \ud504\ub85c\uadf8\ub7a8\ub418\uc5b4 \uc788\ub2e4\uace0 \uac00\uc815\ud558\ub294 \uac83\uacfc \uac19\ub2e4. \uc774 \uc0c1\uad00\uad00\uacc4\ub294 \uc544\ubb34\ub9ac \uac15\ud574\ub3c4\n \ubca8 \ubd80\ub4f1\uc2dd\uc758 \ud55c\uacc4\ub97c \ucd08\uacfc\ud560 \uc218 \uc5c6\ub2e4. \uc774\ub294 \uc815\ubcf4\uac00 \uc774\ubbf8 ‘\uad6d\uc18c\uc801’\uc73c\ub85c \ub450 \ub3d9\uc804 \uc548\uc5d0\n \uae30\ub85d\ub418\uc5b4 \uc788\uae30 \ub54c\ubb38\uc774\ub2e4.\n<\/p>\n
\n \uc591\uc790\uc801 \uc0c1\uad00\uad00\uacc4 (\uc5bd\ud798)\ub294 \uc11c\uc6b8\uc758 \uce21\uc815 \uacb0\uacfc\uac00 \ube5b\uc758 \uc18d\ub3c4\uc640 \uc0c1\uad00\uc5c6\uc774 \ub274\uc695\uc758 \uce21\uc815\n \uacb0\uacfc\uc5d0 \uc989\uc2dc \uc601\ud5a5\uc744 \ubbf8\uce58\ub294 \uac83\ucc98\ub7fc \ubcf4\uc774\ub294 \uc5f0\uad00\uc131\uc744 \ub9cc\ub4e4\uc5b4\ub0b8\ub2e4. \ub530\ub77c\uc11c \uce21\uc815\ub41c\n \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\ub294 \uc228\uc740 \ubcc0\uc218\ub098 \uad6d\uc18c\uc801\uc778 \uba54\ucee4\ub2c8\uc998\uc73c\ub85c\ub294 \uc124\uba85\ud560 \uc218 \uc5c6\ub294\n \ube44\uad6d\uc18c\uc801\uc778 \uc591\uc790 \uc5ed\ud559\uc801 \uc815\ubcf4\uc758 \uc5f0\uad00\uc131\uc744 \ubc18\uc601\ud55c\ub2e4.\n<\/p>\n\n
\n \uacb0\ub860\uc801\uc73c\ub85c, \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4\ub294 \uc5bd\ud798 \uad11\uc790 \uc30d\uc774 \uacf5\uc720\ud558\ub294 \uc591\uc790\uc801 \uc815\ubcf4\uc758 \uc815\ub3c4\ub97c\n \uc2e4\ud5d8\uc801\uc73c\ub85c \uc815\ub7c9\ud654\ud55c \uc218\uce58\uc774\uba70, \uc774 \uc218\uce58\uac00 \uace0\uc804\uc801 \ud55c\uacc4\ub97c \uc704\ubc30\ud55c\ub2e4\ub294 \uc0ac\uc2e4\uc740 \uc591\uc790\n \uc138\uacc4\uc758 \uadfc\ubcf8\uc801\uc778 \ube44\uad6d\uc18c\uc801 \ud2b9\uc131\uc744 \uc785\uc99d\ud558\ub294 \uacfc\ud559\uc801 \uc99d\uac70\uac00 \ub41c\ub2e4.\n<\/p>\n\n
\ubca8 \ubd80\ub4f1\uc2dd \uc885\ud569 \uc815\ub9ac: \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uacfc \uc591\uc790 \uc5bd\ud798<\/b><\/h3>\n\n
\n \uc885\ud569\ud558\uba74, \ubca8 \ubd80\ub4f1\uc2dd(Bell’s Inequality)\uc740 \uc591\uc790 \uc5ed\ud559\uc774 \uc81c\uc2dc\ud558\ub294 \ube44\uad6d\uc18c\uc131\uc774\ub77c\ub294\n \uadfc\ubcf8\uc801\uc778 \uac1c\ub150\uc744 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc774\ub77c\ub294 \uace0\uc804\uc801 \uc138\uacc4\uad00\uacfc \uac1d\uad00\uc801\uc73c\ub85c \uad6c\ubcc4\ud558\ub294 \uc218\ud559\uc801\n \uae30\uc900\uc774\uc790 \uc2e4\ud5d8\uc801 \uc99d\uac70\uc774\ub2e4.\n<\/p>\n\n
\ubca8 \ubd80\ub4f1\uc2dd\uc740 \ub2e4\uc74c\uc758 \ub450 \uac00\uc9c0 \uace0\uc804\uc801\uc778 \ucca0\ud559\uc801 \uac00\uc815 \uc704\uc5d0\uc11c \uc2dc\uc791\ub41c\ub2e4.<\/p>\n\n
\n (1)\uc2e4\uc7ac\ub860: \uce21\uc815\ub418\uae30 \uc774\uc804\uc5d0 \uc785\uc790\ub294 \uc774\ubbf8 \uadf8 \uc18d\uc131(\uc608: \uc2a4\ud540, \ud3b8\uad11)\uc744 \uc228\uaca8\uc9c4 \ud615\ud0dc\ub85c\n \uac00\uc9c0\uace0 \uc788\ub2e4(\uc228\uc740 \ubcc0\uc218). \uc989, \uc18d\uc131\uc740 \uad00\ucc30\uacfc \ubb34\uad00\ud558\uac8c \uc874\uc7ac\ud55c\ub2e4.\n<\/p>\n
\n (2)\uad6d\uc18c\uc131: \uba40\ub9ac \ub5a8\uc5b4\uc9c4 \ub450 \uc0ac\uac74\uc740 \ube5b\uc758 \uc18d\ub3c4\ubcf4\ub2e4 \ube60\ub974\uac8c \uc11c\ub85c\uc5d0\uac8c \uc601\ud5a5\uc744 \uc904 \uc218\n \uc5c6\ub2e4. \uc11c\uc6b8\uc758 \uce21\uc815\uc740 \ub274\uc695\uc758 \uce21\uc815 \uacb0\uacfc\uc5d0 \uc989\uc2dc \uc601\ud5a5\uc744 \ubbf8\uce58\uc9c0 \uc54a\ub294\ub2e4.\n<\/p>\n\n
\n \ubca8 \ubd80\ub4f1\uc2dd\uc740 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc774 \ucc38\uc774\ub77c\uace0 \uac00\uc815\ud588\uc744 \ub54c, \uc5bd\ud78c \uc785\uc790 \uc30d\uc5d0 \ub300\ud55c \ub450 \uce21\uc815\n \uacb0\uacfc\uc758 \ud1b5\uacc4\uc801 \uc0c1\uad00\uad00\uacc4($S$)\uac00 \ub9cc\uc871\ud574\uc57c \ud558\ub294 \ucd5c\ub300 \ud55c\uacc4\ub97c \uc218\ud559\uc801\uc73c\ub85c \uc124\uc815\ud55c\ub2e4.\n<\/p>\n\n
\n $|S|$ \uac12\uc740 \ud56d\uc0c1 2\ub97c \ub118\uc744 \uc218 \uc5c6\ub2e4 ($\\mathbf{|S| \\le 2}$). \uace0\uc804\uc801\uc778 \ud655\ub960 \ubc95\uce59\uacfc\n \uad6d\uc18c\uc801 \uc815\ubcf4 \uacf5\uc720\ub9cc\uc73c\ub85c\ub294 $S$\uac00 2\ub97c \ucd08\uacfc\ud558\ub294 \uac15\ud55c \uc5f0\uad00\uc131\uc744 \ub9cc\ub4e4\uc5b4\ub0bc \uc218 \uc5c6\ub2e4.\n<\/p>\n\n
\n \uc2e4\ud5d8\uc5d0\uc11c\ub294 \uc5bd\ud78c \uad11\uc790 \uc30d\uc744 \ubd84\ub9ac\ud558\uc5ec \uc11c\uc6b8\uacfc \ub274\uc695\uc774 \uac01\uac01 \ub2e4\ub978 \uac01\ub3c4\uc5d0\uc11c \uce21\uc815\ud558\uace0,\n \uc218\ub9ce\uc740 \uce21\uc815 \uacb0\uacfc\ub97c \uc870\ud569\ud558\uc5ec \uc2e4\ud5d8\uc801 \ud1b5\uacc4\ub7c9 $S$\ub97c \uacc4\uc0b0\ud55c\ub2e4.
\n (1)\uce21\uc815 \ub300\uc0c1: \ub450 \uad11\uc790\uc758 \ud2b9\uc815 \uce21\uc815 \uac01\ub3c4($\\theta_A, \\theta_B$)\uc5d0 \ub530\ub978 \uc774\uc9c4\uc801\n \uce21\uc815 \uacb0\uacfc($+1$ \ub610\ub294 $-1$)\uc758 \uc77c\uce58\/\ubd88\uc77c\uce58 \ud69f\uc218\ub2e4. \uc774 \uc0c1\uad00 \uacc4\uc218\ub294 \uc5bd\ud78c \uad11\uc790 \uc30d\uc774\n \uacf5\uc720\ud558\ub294 \uc591\uc790\uc801 \uc815\ubcf4\uc758 \uc5f0\uad00\uc131 \uc815\ub3c4\ub97c \uc218\uce58\ud654\ud55c \uac83\uc774\ub2e4.
\n (2)\ud30c\ub3d9 \ud568\uc218\uc758 \uae30\ub85d: \uc5bd\ud78c \uad11\uc790 \uc30d\uc740 \ubd84\ub9ac \ubd88\uac00\ub2a5\ud55c \ub2e8\uc77c \ud30c\ub3d9 \ud568\uc218($\\psi$)\ub85c\n \uae30\uc220\ub418\uba70, \uc774\ub294 \ub450 \uc785\uc790\uac00 \uac1c\ubcc4\uc801\uc778 \uad6d\uc18c\uc801 \uc18d\uc131\uc774 \uc544\ub2cc, \ube44\uad6d\uc18c\uc801\uc778 \ud1b5\uc77c\ub41c \uc591\uc790\n \uc0c1\ud0dc\ub97c \uacf5\uc720\ud558\uace0 \uc788\uc74c\uc744 \uc758\ubbf8\ud55c\ub2e4.
\n (3)\uc591\uc790\uc801 \uc0c1\uad00: \uc11c\uc6b8\uc774 \uc790\uc2e0\uc758 \uad11\uc790\ub97c \uce21\uc815\ud558\ub294 \uc21c\uac04, \uadf8 \uce21\uc815 \uacb0\uacfc\ub294 \ud30c\ub3d9 \ud568\uc218\ub97c\n \ubd95\uad34\uc2dc\ud0a4\uba70 \ub274\uc695\uc758 \uad11\uc790 \uc0c1\ud0dc\ub97c \uc989\uc2dc \uacb0\uc815\ud55c\ub2e4. \uc774 ‘\uc989\uac01\uc801\uc778 \uc5f0\uad00\uc131’\uc774 \uace0\uc804\uc801\n \uc0c1\uad00\uad00\uacc4\uc640 \uad6c\ubcc4\ub418\ub294 \uc591\uc790\uc801 \uc815\ubcf4\uc758 \ud2b9\uc9d5\uc774\ub2e4.\n<\/p>\n\n
\uc2e4\ud5d8(\uc608: \uc544\uc2a4\ud399 \uc2e4\ud5d8) \uacb0\uacfc\ub294 \uc77c\uad00\ub418\uac8c \ubca8 \ubd80\ub4f1\uc2dd\uc758 \uace0\uc804\uc801 \ud55c\uacc4\ub97c \uc704\ubc30\ud588\ub2e4.<\/p>\n\n
\n \uce21\uc815\ub41c \ud1b5\uacc4\ub7c9 $\\mathbf{|S| > 2}$ (\ucd5c\ub300 $\\mathbf{2\\sqrt{2} \\approx\n 2.828}$)\uac00 \uad00\ucc30\ub418\uc5c8\ub2e4.\n<\/p>\n
\n $|S| \\le 2$\uac00 \uc704\ubc30\ub418\uc5c8\ub2e4\ub294 \uac83\uc740 \uad6d\uc18c\uc801 \uc2e4\uc7ac\ub860\uc758 \ub450 \uac00\uc9c0 \ud575\uc2ec \uac00\uc815 \uc911 \uc801\uc5b4\ub3c4\n \ud558\ub098\uac00 \ud2c0\ub838\uc74c\uc744 \uc785\uc99d\ud55c\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \uc774\ub294 \uc591\uc790 \uc5ed\ud559\uc5d0\uc11c \ud575\uc2ec\uc801\uc778 \ud604\uc0c1\uc778 \uc591\uc790\n \uc5bd\ud798\uc774 \ubcf8\uc9c8\uc801\uc73c\ub85c \ube44\uad6d\uc18c\uc801\uc778 \uc5f0\uad00\uc131\uc744 \uac00\uc9c0\uba70, \uc774\ub294 \uace0\uc804\uc801\uc778 \ubb3c\ub9ac \ubc95\uce59\uc73c\ub85c\ub294\n \uc124\uba85\ud560 \uc218 \uc5c6\ub294 \uadfc\ubcf8\uc801\uc778 \uc2e4\uc7ac\uc784\uc744 \ubcf4\uc5ec\uc8fc\ub294 \uac00\uc7a5 \uac15\ub825\ud55c \uacbd\ud5d8\uc801 \uadfc\uac70\uc774\ub2e4.\n<\/p>\n\n
\n \uc774\ub85c\uc368 \ubca8 \ubd80\ub4f1\uc2dd\uc740 \uc591\uc790 \uc5ed\ud559\uc774 \uace0\uc804 \ubb3c\ub9ac\ud559\uacfc \uadfc\ubcf8\uc801\uc73c\ub85c \uad6c\ubcc4\ub418\ub294 \uc9c0\uc810\uc744 \uba85\ud655\ud788\n \uc81c\uc2dc\ud558\uba70, \ud604\ub300 \ubb3c\ub9ac\ud559\uc758 \uae30\ubc18\uc744 \uc774\ub8e8\ub294 \ud575\uc2ec \uc6d0\ub9ac\uac00 \ub418\uc5c8\ub2e4.(\ub05d)\n<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"
\uc5bd\ud78c \uad11\uc790 \uc30d\uc744 \uc0dd\uc131\ud558\ub294 \uc18c\uc2a4\uc5d0\uc11c \ucd9c\ubc1c\ud55c \ub450 \uad11\uc790\ub294 \uac01\uac01 Alice\uc640 Bob\uc758 \ub450 \ucc44\ub110 \ud3b8\uad11\uc790\uc5d0 \ub3c4\ub2ec\ud558\uace0, \ud3b8\uad11\uc790\ub294 \uad11\uc790\ub97c +1 \ub610\ub294 \u22121 \uacbd\ub85c\ub85c \ubd84\ub9ac\ud574 \uac80\ucd9c\uae30\ub85c \uc804\ub2ec\ud55c\ub2e4. \ub450 \uce21\uc815\uc790\ub294 \ub3c5\ub9bd\uc801\uc73c\ub85c \uce21\uc815 \uac01\ub3c4\ub97c \uc120\ud0dd\ud558\uba70, \uac80\ucd9c\uae30\ub294 \uac01 \uacb0\uacfc\ub97c \ub3d9\uc2dc\uc131 \ubaa8\ub2c8\ud130\uc5d0 \uae30\ub85d\ud558\uc5ec \ud55c \uc30d\uc758 \uad11\uc790\uc5d0\uc11c \ub098\uc628 \uc2e0\ud638\uac00 \uc0c1\uad00\uacc4\uc218 \ubd84\uc11d\uc5d0 \uc0ac\uc6a9\ub41c\ub2e4. \uc18c\uc2a4\uac00 \ub9cc\ub4e4\uc5b4\ub0b8 \uc5bd\ud78c \uad11\uc790\uc30d\uc740 \ub9c8\uce58 \ubcf4\uc774\uc9c0 \uc54a\ub294 \ub048\uc73c\ub85c \uc5f0\uacb0\ub41c \ub450 \uc874\uc7ac\ucc98\ub7fc, … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-65","page","type-page","status-publish"],"_links":{"self":[{"href":"https:\/\/dongsimhern.com\/index.php?rest_route=\/wp\/v2\/pages\/65","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dongsimhern.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/dongsimhern.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/dongsimhern.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dongsimhern.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=65"}],"version-history":[{"count":2,"href":"https:\/\/dongsimhern.com\/index.php?rest_route=\/wp\/v2\/pages\/65\/revisions"}],"predecessor-version":[{"id":68,"href":"https:\/\/dongsimhern.com\/index.php?rest_route=\/wp\/v2\/pages\/65\/revisions\/68"}],"wp:attachment":[{"href":"https:\/\/dongsimhern.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=65"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}