Page 11 - 共同研究R3 数理 黒田_Neat

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ྩ࿨ 3 ೥౓෼ ೋࠃؒަྲྀࣄۀ ڞಉݚڀʻਃ੥಺༰ʼ

ʢ̎ʣڞಉݚڀͷ४උঢ়گٴͼ࣮ࢪܭըͳͲʢ͖ͭͮʣ

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ਤ 4: ϑΥϊϯ༠ىͷ Cr εϐϯͷʮػցతϥϏৼಈʯ(a) θʔϚϯ෼྾ͨ͠ Cr εϐϯ S z = ±1 ͷ
४Ґͱ SAW ͷڞ໐ʹΑΔભҠɻ(b) ଌఆͷύϧεγʔΫΤϯε (্) SAW ͷΈΛҹՃͨ͠৔߹ɺ
(Լ) SAW ͱϚΠΫϩ೾(RF)ͷ྆ํΛҹՃͨ͠৔߹ɻ (c) Cr εϐϯͱϑΥϊϯͱͷ݁߹ɻSAW प
೾਺m ͱͷڞ໐ҐஔͰࠞ੒ʹΑΔ݁߹ঢ়ଶ(phonon-dressed state)͕ੜ͡Δɻ
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(d) SAW ༠ىͷ Cr εϐϯ४ҐؒͷભҠ (ػցతϥϏৼಈ)
υοτࢼྉͷ໘௚ํ޲΁ͷ࣓৔ҹՃʹΑΓ Cr εϐϯ S z = ʶ1 ͷ४Ґ͕θʔϚϯ෼྾ͨ͠ঢ়ଶͰɺ
෼྾ΤωϧΪʔʹڞ໐͢Δप೾਺ͷ SAW Λൃੜͤ͞Δͱɺ2 ͭͷ४ҐؒʹपظతͳભҠ͕ੜ͡Δ(ਤ
4(a))ɻ͜Ε͸ϚΠΫϩ೾ʹΑΔϥϏৼಈͱಉ༷ͷݱ৅(ʮػցతʯϥϏৼಈ)ͰɺϑΥϊϯʹΑΓ༠ى
͞ΕͨεϐϯͷίώʔϨϯτͳભҠͰ͋ΔɻϨʔβʔরࣹʹΑΔྭىࢠͷڞ໐ྭىԼͰ Cr εϐϯͷ
ಛఆͷঢ়ଶΛੜ੒͠ɺύϧεঢ়ͷ SAW ҹՃͰػցతϥϏৼಈΛੜͤ͡͞ɺ࠶౓ͷϨʔβʔরࣹԼͷ
ྭىࢠൃޫ؍ଌʹΑΓ Cr εϐϯঢ়ଶͷมԽΛݕग़͢Δ(ਤ 4(b) (্)ʹύϧεγʔΫΤϯεΛࣔ͢)ɻ
SAW ύϧεͷ࣋ଓ࣌ؒΛมԽͤ͞ Cr εϐϯͷભҠΛ؍ଌ͢Δ͜ͱʹΑΓ Cr εϐϯͷίώʔϨϯε
ΛධՁ͢Δɻ·ͨϚΠΫϩ೾ͱSAWͷ૒ํ͔Β੒ΔύϧεγʔΫΤϯε(ਤ4(b)(Լ)ɺ͍ΘΏΔRamsey
pulse sequence)ͷԼͰಉ༷ͷଌఆΛߦ͍ɺ྆ऀͷ૊Έ߹ΘͤʹΑΔ Cr εϐϯঢ়ଶͷ੍ޚΛࢼΈΔɻ
͞Βʹ Cr εϐϯͱ֨ࢠ࿪ͱͷڧ͍݁߹ΑΓɺ্هͷڞ໐ঢ়ଶͰ͸εϐϯͱϑΥϊϯͱͷࠞ੒ঢ়ଶ
(phonon-dressed state)͕ੜ͡ɺࠞ੒ͷ౓߹͍͸͸ SAW ͷৼಈڧ౓ͱڞʹ૿Ճ͢Δ(ਤ 4(c))ɻ͜Ε͸ޫ
γϡλϧΫޮՌʹ͓͚ΔεϐϯͱϑΥτϯͱͷࠞ੒ঢ়ଶ(photon-dressed state)ͱྨࣅͷݱ৅Ͱ͋Δɻ
ࠞ੒ঢ়ଶͰ͸ Cr εϐϯ͸ϑΥϊϯͱίώʔϨϯτʹ݁߹͠ɺϑΥϊϯ༳Β͗ʹΑΔσίώʔϨϯε
ͷ཈੍͕༧૝͞ΕΔɻSAW ͷৼಈڧ౓ΛมԽͤͯ͞εϐϯ४ҐؒͷભҠΛ؍ଌ͠ɺ্هͷڧ݁߹ঢ়
ଶΛ࣮ূ͢Δɻ
(e) ϑΥϊϯΛഔհͱͨ͠ Cr ؒͷ૬ޓ࡞༻
1 ͭͷυοτதͷ Cr εϐϯʹରͯ͠ SAW ༠ىͷϥϏৼಈΛੜͤ͡͞ɺผͷυοτதͷ Cr εϐϯ
ͷৼ෣͍Λௐ΂Δɻ͜ΕʹΑΓ SAW ͕ࢼྉதΛ఻೻͢ΔதͰɺ཭Εͨυοτதͷ Cr εϐϯؒͷ૬
͕ؔੜ͡Δ͔Λௐ΂ɺϑΥϊϯഔհʹΑΔ Cr εϐϯؒͷ૬ޓ࡞༻ͷݕग़ΛࢼΈΔɻ

ަྲྀܭըʹ͍ͭͯ͸ɺ2021 ೥౓౰ॳͷάϧϊʔϒϧͰͷΩοΫΦϑϛʔςΟϯάΛൽ੾Γʹɺͭ͘͹ɺάϧ
ϊʔϒϧͱަޓʹ೥ 2 ճͣͭݚڀใࠂձΛ։࠵͢ΔɻͦΕʹՃ͑ɺएखॿڭ(TRAORÉ Aboulayer, ळࢁྃ
ଠ)ͷ͏ͪ 1 ໊ɺେֶӃੜ 1 ໊ͣͭΛ೥౓ຖʹͦΕͧΕ 1 ϲ݄ͳ͍͠ 3 ϲ݄ؒάϧϊʔϒϧʹ೿ݣ͠ɺυοτ
ࢼྉͷݦඍ෼ޫଌఆʹैࣄͤ͞ɺ୯Ұ Cr ݪࢠͷυοτͷ୳ࡧɺͳ͍͠ SAW ൃੜʹΑΔ Cr มௐͷݕग़ͷ࣮
ݧΛߦ͏ɻ·ͨάϧϊʔϒϧଆେֶӃੜΛஜ೾େଆʹड͚ೖΕɺMBE ʹΑΔυοτࢼྉ࡞੡΍ SAW ൃੜͷ
ͨΊͷඍࡉՃ޻ͷ࣮ݧʹैࣄ͢Δػձ΋ઃ͚Δ༧ఆͰ͋Δɻ

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