Quantum nondemolition measurement using semiconductor devices

Anders Karlsson; Edgard Goobar; Gunnar Björk; Pierre-Jean Rigole

Quantum Electronics and Laser Science Conference
OSA Technical Digest (Optica Publishing Group, 1993),
paper QThF5

Quantum nondemolition measurement using semiconductor devices

Anders Karlsson, Edgard Goobar, Gunnar Björk, and Pierre-Jean Rigole

Quantum Electronics and Laser Science Conference 1993

Baltimore, Maryland United States
2–7 May 1993
ISBN: 1-55752-302-9

From the session
Squeezed States (QThF)

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A. Karlsson, E. Goobar, G. Björk, and P. Rigole, "Quantum nondemolition measurement using semiconductor devices," in Quantum Electronics and Laser Science Conference, D. Auston, D. Steel, T. Heinz, and G. Stegeman, eds., Vol. 12 of OSA Technical Digest (Optica Publishing Group, 1993), paper QThF5.

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Abstract

Quantum amplifiers, quantum-nondemolition (QND) detectors, and quantum-state duplicators are of great fundamental interest, Cloning, in the sense of state duplication, is forbidden for general states, but observable duplication is permitted.¹ Furthermore, phase-sensitive amplifiers can amplify one quadrature noiselessly, imposing the inevitable amplifier noise on the conjugate quadrature.¹¹ A related topic is QND measurement, in which a signal is measured without being disturbed, again by imposing the measurement noise on the conjugate observable.³

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