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Protective Measurements: Probing Single Quantum Systems


Affiliations
1 Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110 025, India
2 Centre for Interdisciplinary Sciences, 21 Brundavan Colony, Narsingi, Hyderabad 500 075, India
 

Making measurements on single quantum systems is considered difficult, almost impossible if the state is a priori unknown. Protective measurements suggest a possiblity to measure single quantum systems and gain some new information in the process. Protective measurement is described here, both in the original and generalized form. The degree to which the system and the apparatus remain entangled in a protective measurement, is assessed. Possible exterimental tests of protective measurements are also discussed.

Keywords

Expectation Value, Protective Measurements, Quantum Systems, Wavefunction Collapse.
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  • Protective Measurements: Probing Single Quantum Systems

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Authors

Tabish Qureshi
Centre for Theoretical Physics, Jamia Millia Islamia, New Delhi 110 025, India
N. D. Hari Dass
Centre for Interdisciplinary Sciences, 21 Brundavan Colony, Narsingi, Hyderabad 500 075, India

Abstract


Making measurements on single quantum systems is considered difficult, almost impossible if the state is a priori unknown. Protective measurements suggest a possiblity to measure single quantum systems and gain some new information in the process. Protective measurement is described here, both in the original and generalized form. The degree to which the system and the apparatus remain entangled in a protective measurement, is assessed. Possible exterimental tests of protective measurements are also discussed.

Keywords


Expectation Value, Protective Measurements, Quantum Systems, Wavefunction Collapse.

References





DOI: https://doi.org/10.18520/cs%2Fv109%2Fi11%2F2023-2028