<i>Men of Bronze: Hoplite Warfare in Classical Greece</i>. Edited by Donald Kagan and Gregory F. Viggiano. (Princeton, NJ: Princeton University Press, 2013. Pp. xxvi, 286. $35.00.)

Wheeler, Everett L.

doi:10.1111/hisn.12062_58

Cited by 3 publications

(4 citation statements)

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“…In fact, when the choice is made has no impact on the measurement statistics. This is the essence of the delayed choice gedanken experiment [76,106], whose relevance for the demonstration of quantum coherent control is discussed in Sec. 5.…”

Section: Quantum Erasurementioning

confidence: 99%

“…Complementarity also applies in the setting of quantum erasure, where a subensemble with wavelike statistics is chosen and where the timing of that choice is irrelevant for the outcome of the experiment [76,102]. Quantum erasure can therefore be a particular realization of the so-called delayed-choice gedanken experiment [106,115].…”

Section: Delayed Choice Coherent Controlmentioning

confidence: 99%

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An Approach To “Quantumness” In Coherent Control

Scholak

Brumer

2017

Advances in Chemical Physics

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Developments in the foundations of quantum mechanics have identified several attributes and tests associated with the "quantumness" of systems, including entanglement, nonlocality, quantum erasure, Bell test, etc.. Here we introduce and utilize these tools to examine the role of quantum coherence and nonclassical effects in 1 vs. N photon coherent phase control, a paradigm for an all-optical method for manipulating molecular dynamics. In addition, truly quantum control scenarios are introduced and examined. The approach adopted here serves as a template for studies of the role of quantum mechanics in other coherent control and optimal control scenarios.

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Section: Quantum Erasurementioning

confidence: 99%

Section: Delayed Choice Coherent Controlmentioning

confidence: 99%

An Approach To “Quantumness” In Coherent Control

Scholak

Brumer

2017

Advances in Chemical Physics

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“…It seems that the photon may know in advance the type of detecting device, via a hidden variable, and could thus decide which behavior to exhibit. To examine this idea, Wheeler formulated the delayed-choice experiment [4][5][6][7]. In this gedanken experiment, the choice whether to insert the second beam splitter is delayed with respect to the photon entering the interferometer.…”

Section: Introductionmentioning

confidence: 99%

Proposal for a quantum delayed-choice experiment with a spin-mechanical setup

2016

Phys. Rev. A

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We describe an experimentally feasible protocol for performing a variant of the quantum delayedchoice experiment with massive objects. In this scheme, a single nitrogen-vacancy (NV) center in diamond driven by microwave fields is dispersively coupled to a massive mechanical resonator. A double-pulse Ramsey interferometer can be implemented with the spin-mechanical setup, where the second Ramsey microwave pulse drives the spin conditioned on the number states of the resonator. The probability for finding the NV center in definite spin states exhibits interference fringes when the mechanical resonator is prepared in a specific number state. On the other hand, the interference is destroyed if the mechanical resonator stays in some other number states. The wavelike and particlelike behavior of the NV spin can be superposed by preparing the mechanical resonator in a superposition of two distinct number states. Thus a quantum version of Wheeler's delayedchoice experiment could be implemented, allowing of fundamental tests of quantum mechanics on a macroscopic scale.

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“…The possibility of such a causal link is precluded in Wheeler's delayed-choice experiment [6][7][8], in which the observer randomly chooses whether to insert BS 2 , and thus whether to perform an interference or a which-path experiment, after the photon has passed through BS 1 . Therefore, the photon could not "know" in advance which behavior it should exhibit.…”

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confidence: 99%

Quantum Delayed-Choice Experiment with a Beam Splitter in a Quantum Superposition

Zheng

Zhong

et al. 2015

Phys. Rev. Lett.

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A quantum system can behave as a wave or as a particle, depending on the experimental arrangement. When, for example, measuring a photon using a Mach-Zehnder interferometer, the photon acts as a wave if the second beam splitter is inserted, but as a particle if this beam splitter is omitted. The decision of whether or not to insert this beam splitter can be made after the photon has entered the interferometer, as in Wheeler's famous delayed-choice thought experiment. In recent quantum versions of this experiment, this decision is controlled by a quantum ancilla, while the beam splitter is itself still a classical object. Here, we propose and realize a variant of the quantum delayed-choice experiment. We configure a superconducting quantum circuit as a Ramsey interferometer, where the element that acts as the first beam splitter can be put in a quantum superposition of its active and inactive states, as verified by the negative values of its Wigner function. We show that this enables the wave and particle aspects of the system to be observed with a single setup, without involving an ancilla that is not itself a part of the interferometer. We also study the transition of this quantum beam splitter from a quantum to a classical object due to decoherence, as observed by monitoring the interferometer output. The wave-particle duality is one of the fundamental mysteries that lie at the heart of quantum mechanics. However, these two incompatible aspects cannot be observed simultaneously, as captured by Bohr's principle of complementarity [1-5]: Particlelike versus wavelike outcomes are selected by experimental arrangements that are mutually exclusive. This is well illustrated by the Mach-Zehnder interferometer, as shown in Fig. 1(a). Split by the first beam splitter (BS 1 ), a photon travels along two paths, 0 and 1. The relative phase θ between the quantum states associated with these paths is tunable. In the presence of the second beam splitter (BS 2 ), the two paths are recombined and the probability for detecting the photon in the detector D 0 or D 1 is a sinusoidal function of θ exhibiting wavelike interference fringes. On the other hand, in the absence of BS 2 , the experiment reveals which path the photon followed, and the photon is detected in one or the other detector with equal probability 1=2, thus behaving as a particle.One can argue that the behavior of the photon is predetermined by the experimental arrangement, where the presence or absence of the second beam splitter affects the photon prior to its entering the interferometer. The possibility of such a causal link is precluded in Wheeler's delayed-choice experiment [6][7][8], in which the observer randomly chooses whether to insert BS 2 , and thus whether to perform an interference or a which-path experiment, after the photon has passed through BS 1 . Therefore, the photon could not "know" in advance which behavior it should exhibit. Wheeler's delayed-choice experiment has been demonstrated previously [9][10][11][12][13], where the spacelike separation ...

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Men of Bronze: Hoplite Warfare in Classical Greece. Edited by Donald Kagan and Gregory F. Viggiano. (Princeton, NJ: Princeton University Press, 2013. Pp. xxvi, 286. $35.00.)

Cited by 3 publications

References 0 publications

An Approach To “Quantumness” In Coherent Control

An Approach To “Quantumness” In Coherent Control

Proposal for a quantum delayed-choice experiment with a spin-mechanical setup

Quantum Delayed-Choice Experiment with a Beam Splitter in a Quantum Superposition

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