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Free accessOther version: http://link.aps.org/doi/10.1103/PhysRevB.73.235331
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unige:4184 
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Parity meter for charge qubits : an efficient quantum entangler |
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| Authors | ||
| Published in | Physical Review. B, Condensed Matter. 2006, vol. 73, no. 235331, p. 7 | |
| Abstract | We propose a realization of a charge parity meter based on two double quantum dots alongside a quantum point contact. Such a device is a specific example of the general class of mesoscopic quadratic quantum measurement detectors previously investigated by Mao et al. [Phys. Rev. Lett. 93, 056803 (2004)]. Our setup accomplishes entangled state preparation by a current measurement alone, and allows the qubits to be effectively decoupled by pinching off the parity meter. Two applications of the parity meter are discussed: the measurement of Bell's inequality in charge qubits and the realization of a controlled NOT gate. | |
| Keywords | Quantum point contacts — Quantum dots — Quantum entanglement | |
| Identifiers | arXiv: cond-mat/0602514 | |
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| Citation (ISO format) | TRAUZETTEL, B. et al. Parity meter for charge qubits : an efficient quantum entangler. In: Physical Review. B, Condensed Matter, 2006, vol. 73, n° 235331, p. 7. https://archive-ouverte.unige.ch/unige:4184 |
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