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Dynamics and Decoherence in Quantum - Dot Spin Qubits

Mahn‐Soo Choi

한국자기학회 학술연구발표회 논문개요집Dec 1, 20040 citations

a kind of multi-party non-repudiation protocol with consistent evidence

Dongmei Liu, Sihan Qing

Liu Dongmei Chinese Acad Sci, Natl Engn Res Ctr Fundamental Software, Inst Software, Beijing 100080, Peoples R China. Qing Sihan Chinese Acad Sci, Engn Res Ctr Informat Secur Technol, Inst Software, Beijing 100080, Peoples R China. Liu Dongmei Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China.

Jan 1, 20090 citations

Apparent quantum paradoxes as simple interference: Quantum violation of the pigeonhole principle and exchange of properties between quantum particles

Raul Corrêa, Pablo L. Saldanha

It was recently argued that the pigeonhole principle, which states that if three pigeons are put into two pigeonholes then at least one pigeonhole must contain more than one pigeon, is violated in quantum systems [Proc. Natl. Acad. Sci. USA 113, 532 (2016)]. An experimental verification of this effect was recently reported [Proc. Natl. Acad. Sci. USA 116, 1549 (2019)]. In another recent experimental work, it was argued that two entities were observed to exchange properties without meeting each other [Nat. Commun. 11, 3006 (2020)]. Here we describe all these proposals and experiments as simple quantum interference effects where no such dramatic conclusions appear. Besides demystifying some of the conclusions of the cited works, we also present physical insights for some interesting behaviors present in these treatments. For instance, we associate the anomalous particles behaviors in the quantum pigeonhole effect to a quantum interference of force.It was recently argued that the pigeonhole principle, which states that if three pigeons are put into two pigeonholes then at least one pigeonhole must contain more than one pigeon, is violated in quantum systems [Proc. Natl. Acad. Sci. USA 113, 532 (2016)]. An experimental verification of this effect was recently reported [Proc. Natl. Acad. Sci. USA 116, 1549 (2019)]. In another recent experimental work, it was argued that two entities were observed to exchange properties without meeting each other [Nat. Commun. 11, 3006 (2020)]. Here we describe all these proposals and experiments as simple quantum interference effects where no such dramatic conclusions appear. Besides demystifying some of the conclusions of the cited works, we also present physical insights for some interesting behaviors present in these treatments. For instance, we associate the anomalous particles behaviors in the quantum pigeonhole effect to a quantum interference of force.

arXiv:2102.09979Physical Review AJul 16, 20217 citations

Dephasing rate in an InAs/GaAs single-electron quantum dot qubit

Liuxian Pan, Shu‐Shen Li, Jinlong Liu +3 more

Science China MathematicsMay 1, 20020 citations

Quantum Dynamics of Coupled Quantum-Dot Qubits and Dephasing Effects Induced by Detections

Ping Sheng, Zikang Tang

Recently, the investigations on the coherent tunnelling in a coupled quantum-dot (QD) system have carried out both experimentally (Blick et al., 1998, and Oosterkamp et al., 1998), and theoretically (Tsukada et al., 1997, and Wu et al., 2000). However, all of these studies did not take the influence of the measurement into account. It is well known that measurement itself will certainly induce dephasing. This effect was studied (Aleiner et at., 1997, Levinson, 1997, and E. Buks et al., 1998) in detail. Also, Gurvitz et al. (1996, 1997) derived modified rate equations and studied the dephasing effect induced by measuring the electron state in a coupled QD system via a quantum point contact.Recently, the investigations on the coherent tunnelling in a coupled quantum-dot (QD) system have carried out both experimentally (Blick et al., 1998, and Oosterkamp et al., 1998), and theoretically (Tsukada et al., 1997, and Wu et al., 2000). However, all of these studies did not take the influence of the measurement into account. It is well known that measurement itself will certainly induce dephasing. This effect was studied (Aleiner et at., 1997, Levinson, 1997, and E. Buks et al., 1998) in detail. Also, Gurvitz et al. (1996, 1997) derived modified rate equations and studied the dephasing effect induced by measuring the electron state in a coupled QD system via a quantum point contact.

CRC Press eBooksMar 6, 20030 citations

Dynamics of quantum correlation for a qubit–qutrit system in the presence of the dephasing environments

Xiaoning Hao, Jinchuan Hou, Jun‐Qi Li

Quantum Information ProcessingApr 25, 20164 citations

Quantum Dynamics of Coupled Quantum-Dot Qubits and Dephasing Effects Induced by Detections

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Quantum Dynamics of Coupled Quantum-Dot Qubits and Dephasing Effects Induced by Detections

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