In quantum mechanics (and computation & information), weak measurements are a type of quantum measurement that results in an observer obtaining very little information about the system on average, but also disturbs the state very little.[1] From Busch's theorem[2] the system is necessarily disturbed by the measurement. In the literature weak measurements are also known as unsharp,[3] fuzzy,[3][4] dull, noisy,[5] approximate, and gentle[6] measurements. Additionally weak measurements are often confused with the distinct but related concept of the weak value.[7]
^Todd A Brun (2002). "A simple model of quantum trajectories". Am. J. Phys. 70 (7): 719–737. arXiv:quant-ph/0108132. Bibcode:2002AmJPh..70..719B. doi:10.1119/1.1475328. S2CID 40746086.
^Paul Busch (2009). J. Christian; W.Myrvold (eds.). "No Information Without Disturbance": Quantum Limitations of Measurement. Invited contribution, "Quantum Reality, Relativistic Causality, and Closing the Epistemic Circle: An International Conference in Honour of Abner Shimony", Perimeter Institute, Waterloo, Ontario, Canada, July 18–21, 2006. Vol. 73. Springer-Verlag, 2008. pp. 229–256. arXiv:0706.3526. doi:10.1007/978-1-4020-9107-0. ISBN 978-1-4020-9106-3. ISSN 1566-659X. {{cite book}}: |journal= ignored (help)
^ abGudder, Stan (2005). "Non-disturbance for fuzzy quantum measurements". Fuzzy Sets and Systems. 155 (1): 18–25. doi:10.1016/j.fss.2005.05.009.
^Asher Peres (1993). Quantum Theory, Concepts and Methods. Kluwer. p. 387. ISBN 978-0-7923-2549-9.
^A. N. Korotkov (2003). "Noisy Quantum Measurement of Solid-State Qubits: Bayesian Approach". In Y. v. Nazarov (ed.). Quantum Noise in Mesoscopic Physics. Springer Netherlands. pp. 205–228. arXiv:cond-mat/0209629. doi:10.1007/978-94-010-0089-5_10. ISBN 978-1-4020-1240-2. S2CID 9025386.
^Cite error: The named reference Winter1999 was invoked but never defined (see the help page).
^Yakir Aharonov; David Z. Albert & Lev Vaidman (1988). "How the result of a measurement of a component of the spin of a spin-1/2 particle can turn out to be 100". Physical Review Letters. 60 (14): 1351–1354. Bibcode:1988PhRvL..60.1351A. doi:10.1103/PhysRevLett.60.1351. PMID 10038016. S2CID 46042317.
quantum mechanics (and computation & information), weakmeasurements are a type of quantum measurement that results in an observer obtaining very little...
together known as the weak bosons or more generally as the intermediate vector bosons. These elementary particles mediate the weak interaction; the respective...
Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events. In other words, measurement...
postselection. It should not be confused with a weakmeasurement, which is often defined in conjunction. The weak value was first defined by Yakir Aharonov...
obtained from an analysis of weakmeasurements, which consist in interpreting the particle history previous to measurement by studying quantum systems...
photon will make its contribution (although, there may be ways to use weakmeasurement to acquire more information without violating the uncertainty principle)...
G.; Song, C.; Lin, Q. (2021). "An Optical Chiral Sensor Based on WeakMeasurement for the Real-Time Monitoring of Sucrose Hydrolysis". Sensors (Basel...
with a glass electrode and a pH meter or a color-changing indicator. Measurements of pH are important in chemistry, agronomy, medicine, water treatment...
Steinberg, A. M. (2012). "Violation of Heisenberg's Measurement–Disturbance Relationship by WeakMeasurements". Physical Review Letters. 109 (10): 100404. arXiv:1208...
from the University of Toronto in Canada for using the technique of "weakmeasurement" to track the average paths of single photons passing through a Young's...
COOH {\displaystyle {\ce {CH3COOH}}} ) is an example of a weak acid. The strength of a weak acid is quantified by its acid dissociation constant, K a...
precision measurement of the weak mixing angle in Møller scattering. Stanford Linear Accelerator (SLAC) (Report). Stanford University. Q-weak: A precision...
M. Steinberg: ‘Observing the trajectories of a single photon using weakmeasurement’, Science 3, June 2011, vol. 332 no. 6034, pp. 1170–1173, doi:10.1126/science...
the latest, approximately 17 years of age. Measurements vary, with studies that rely on self-measurement reporting a significantly higher average than...
and C. L. Degen. Tracking the precession of single nuclear spins by weakmeasurements. Nature 571, 230-233 (2019) doi:10.1038/s41586-019-1334-9 v t e...
original on 2 September 2006. Measurement of the Positive Muon Lifetime "The Review of Particle Physics". "The TRIUMF Weak Interaction Symmetry Test". "The...
by a tornado. Intensity can be measured by in situ or remote sensing measurements, but since these are impractical for wide-scale use, intensity is usually...
requires a measurement, which would ordinarily destroy coherence and ruin the experiment. He and his colleagues claim that they were able to use weak measurements...
background sources around the lensing mass. Weak gravitational lensing is thus an intrinsically statistical measurement, but it provides a way to measure the...
weak ordering is a mathematical formalization of the intuitive notion of a ranking of a set, some of whose members may be tied with each other. Weak orders...
enhance atom-light coupling with a relatively weak field, and hence an enhanced precise quantum measurement with little disruption to the quantum system...
related to irreversibility of measurement in quantum mechanics according to the Copenhagen interpretation of quantum mechanics; Weak arrow of time: preference...
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