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Coherent control of three-spin states in a triple quantum dot

Louis Gaudreau, Ghislain Granger, A. Kam +6 more

arXiv:1106.3518Nature PhysicsNov 27, 2011251 citations

Coherent control of higher-order nonlinearities in triple quantum dot molecules

Jaleshwar Nagwar Mahto, Rohit Hazra, Nitu Borgohain +1 more

The European Physical Journal PlusJul 20, 20260 citations

Control of spin blockade by ac magnetic fields in triple quantum dots

Maria Busl, Rafael Sánchez, Gloria Platero

We analyze coherent spin phenomena in triple quantum dots in triangular configuration under crossed dc and ac magnetic fields. In particular, we discuss the interplay between Aharonov-Bohm current oscillations, coherent electron trapping and spin blockade under two-electron-spin-resonance configurations. We demonstrate an unexpected antiresonant behavior in the current, allowing for both removal and restoration of maximally entangled spin-blockaded states by tuning the ac field frequency. Our theoretical predictions indicate how to manipulate spin qubits in a triangular quantum dot array.We analyze coherent spin phenomena in triple quantum dots in triangular configuration under crossed dc and ac magnetic fields. In particular, we discuss the interplay between Aharonov-Bohm current oscillations, coherent electron trapping and spin blockade under two-electron-spin-resonance configurations. We demonstrate an unexpected antiresonant behavior in the current, allowing for both removal and restoration of maximally entangled spin-blockaded states by tuning the ac field frequency. Our theoretical predictions indicate how to manipulate spin qubits in a triangular quantum dot array.

arXiv:0907.0182Physical Review BMar 15, 201071 citations

Fast coherent manipulation of three-electron states in a double quantum dot

Zhan Shi, C. B. Simmons, Daniel R. Ward +9 more

arXiv:1308.0588Nature CommunicationsJan 6, 201494 citations

Coherent manipulation of three‐spin states in a GaAs/AlGaAs triple dot device

Sergei Studenikin, G. C. Aers, Ghislain Granger +5 more

Abstract In this paper we describe our recent experiments on coherent manipulation of electron spin states formed in a highly tunable GaAs/AlGaAs triple quantum dot device. The coherent evolution of spin states is achieved by using fast pulses from an initialization point in the (201) charge configuration region of the stability diagram. We demonstrate the versatility of the triple dot system capable of tuning to different regimes controlled by the width of the (111) region and pulse parameters. In particular we observe Δ'1/2‐Q3/2 (analogue of S‐T+ in a double dot) and Δ'1/2‐Δ1/2 exchange driven oscillations from both sides of the stability diagram involving all three spins. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)Abstract In this paper we describe our recent experiments on coherent manipulation of electron spin states formed in a highly tunable GaAs/AlGaAs triple quantum dot device. The coherent evolution of spin states is achieved by using fast pulses from an initialization point in the (201) charge configuration region of the stability diagram. We demonstrate the versatility of the triple dot system capable of tuning to different regimes controlled by the width of the (111) region and pulse parameters. In particular we observe Δ'1/2‐Q3/2 (analogue of S‐T+ in a double dot) and Δ'1/2‐Δ1/2 exchange driven oscillations from both sides of the stability diagram involving all three spins. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physicsFeb 6, 20131 citation

Coherent manipulation of electronic states in a double quantum dot

利正藤澤

Jan 1, 20030 citations

Coherent control and interplay of three-electron spin states in a triple quantum dot

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