Quantum mechanical interaction-free measurements

@article{Elitzur1993QuantumMI,
  title={Quantum mechanical interaction-free measurements},
  author={Avshalom C Elitzur and Lev Vaidman},
  journal={Foundations of Physics},
  year={1993},
  volume={23},
  pages={987-997}
}
A novel manifestation of nonlocality of quantum mechanics is presented. It is shown that it is possible to ascertain the existence of an object in a given region of space without interacting with it. The method might have practical applications for delicate quantum experiments. 

Figures from this paper

Interaction free measurement
Yet another surprising feature of quantum mechanics is its allowance for interaction free measurement which is the topic of this paper with particular reference to the Elitzur-Vaidman bomb tester.
On the Paradoxical Aspects of New Quantum Experiments
  • L. Vaidman
  • Mathematics
  • PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association
  • 1994
Two recently proposed quantum experiments are analyzed. The first allows to find an object without "touching" it. The second allows to teleport quantum states, transmitting a very small amount ofExpand
Quantum bombing reality
The ideas of quantum mechanics are challenging for students. The quantum bomb thought experiment described here shows how the existence of other possible worlds can affect outcomes in the real worldExpand
The Puzzle of Empty Bottle in Quantum Theory
We discuss an extremely simple effect of ’shadowing’ where the very existence of the measuring apparatus deforms the evolution of quantum states even if the measurement is never preformed. In spiteExpand
Time of Events in Quantum Theory
We enhance elementary quantum mechanics with three simple postulates that enable us to define time observable. We discuss shortly justification of the new postulates and illustrate the concept withExpand
Where Is the Quantum Particle between Two Position Measurements
A controversy about counterfactual computation reveals a paradoxical feature of a pre- and post-selected quantum particle: it can reach a certain location without being on the path that leads to andExpand
Quantum Information and Inferential Reasoning
Information may be extracted from a quantum–mechanical system only by means of inference. For this reason, the observer, although not required as such for obtaining an eigenstate of the measuredExpand
Nonlocal `interaction-free' reduction of the state vector
A nonlocal `interaction-free' experiment is discussed. It is shown that the absence of detection of a photon of a polarization-entangled pair can `force' the other photon of the pair into aExpand
Interaction-Free Measurements
A brief review of interaction-free measurements (IFM) is presented. The IFM is a solution of a quantum puzzle: How to test a bomb which explodes on every test without exploding it? This paper wasExpand
Time anisotropy and quantum measurement: Clues for transcending the geometric picture of time
The yet-unknown origin of the various manifest time asymmetries seems to be related to another persistent problem, namely, the lack of a satisfactory explanation for the presumed “collapse of theExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 23 REFERENCES
On the existence of empty waves in quantum theory
Abstract By extending a Gedankenexperiment due to Elitzur and Vaidman and making some very natural assumptions, we demonstrate that empty waves can manifest their reality in quantum theory byExpand
Quantum mechanics, local realistic theories, and Lorentz-invariant realistic theories.
  • Hardy
  • Physics, Medicine
  • Physical review letters
  • 1992
TLDR
Bell's theorem is demonstrated, without using inequalities, for an experiment with two particles, and it is shown that, if realism and Lorentz-invariant observables are assumed, it can derive a contradiction with quantum mechanics. Expand
N-measurement Bell inequalities, N-atom entangled states, and the nonlocality of one photon
Abstract The derivation of the CHSH Bell inequalities is generalized to an N -measurement scheme. It is then shown that one single photon can be used to prepare (1) an N -atom entangled state, andExpand
Significance of Electromagnetic Potentials in the Quantum Theory
In this paper, we discuss some interesting properties of the electromagnetic potentials in the quantum domain. We shall show that, contrary to the conclusions of classical mechanics, there existExpand
"Relative State" Formulation of Quantum Mechanics
The task of quantizing general relativity raises serious questions about the meaning of the present formulation and interpretation of quantum mechanics when applied to so fundamental a structure asExpand
Single-particle trajectories and interferences in quantum mechanics
In this paper some topics concerning the possibility of describing phenomena of quantum interference in terms of individual particle spacetime trajectories are reviewed. We focus our attention, onExpand
Interaction‐free quantum measurements: A paradox?
In Heisenberg’s famous discussion of the measurement of a particle’s position using a microscope, the momentum transferred to the particle by the scattered photon makes the particle’s momentumExpand
The neutron interferometer as a device for illustrating the strange behavior of quantum systems
The neutron interferometer is a unique instrument that allows one to construct a neutron wave packet of macroscopic size, divide it into two components separated by centimeters, and then coherentlyExpand
Experimental Test of Bell's Inequalities Using Time- Varying Analyzers
Correlations of linear polarizations of pairs of photons have been measured with time-varying analyzers. The analyzer in each leg of the apparatus is an acousto-optical switch followed by two linearExpand
Experimental Evidence for a Photon Anticorrelation Effect on a Beam Splitter: A New Light on Single-Photon Interferences
We report on two experiments using an atomic cascade as a light source, and a triggered detection scheme for the second photon of the cascade. The first experiment shows a strong anticorrelationExpand
...
1
2
3
...