Demonstration of weak measurements, projective measurements, and quantum-to-classical transitions in ultrafast free electron-photon interactions

Pan, Yanbin; Cohen, Eliahu; Karimi, Ebrahim; Gover, A.; Schönenberger, Norbert; Chlouba, Tomáš; Wang, Kangpeng; Nehemia, Saar; Hommelhoff, Peter; Kaminer, Ido; Aharonov, Yakir

doi:10.48550/arxiv.1910.11685

Cited by 4 publications

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“…The free electron can serve as the probe in quantum nondestructive detection of the state of light r ph (53), as suggested theoretically in the context of PINEM (54). The electron plays the role of the measurement device and pointer, and the light plays the role of the system to be measured.…”

Section: The Free Electron As a Probe Of Quantum Weak Measurementmentioning

confidence: 99%

Imprinting the quantum statistics of photons on free electrons

Dahan

Gorlach

Haeusler

et al. 2021

Science

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107

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The interaction between free electrons and light stands at the base of both classical and quantum physics, with applications in free-electron acceleration, radiation sources, and electron microscopy. Yet, to this day, all experiments involving free-electron–light interactions are fully explained by describing the light as a classical wave. Here, we observe quantum statistics effects of photons on free-electron–light interactions. We demonstrate interactions passing continuously from Poissonian to super-Poissonian and up to thermal statistics, revealing a transition from quantum walk to classical random walk on the free-electron energy ladder. The electron walker serves as the probe in non-destructive quantum detection, measuring the second order photon-correlation g(2)(0) and higher-orders g(n)(0). Unlike conventional quantum-optical detectors, the electron can perform both quantum weak measurements and projective measurements by evolving into an entangled joint-state with the photons. These findings inspire hitherto inaccessible concepts in quantum optics, including free-electron-based ultrafast quantum tomography of light.

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Section: The Free Electron As a Probe Of Quantum Weak Measurementmentioning

confidence: 99%

Imprinting the quantum statistics of photons on free electrons

Dahan

Gorlach

Haeusler

et al. 2021

Science

Self Cite

107

View full text Add to dashboard Cite

show abstract

“…This combination of already existing techniques could assist in demonstrating the proposed thought experiment in an analog way. Alternatively, experimental weak measurements of free electrons were recently analyzed in [91], with some preliminary yet promising laboratory results. This implies that (electronic) weak values could soon be measured too within free electron MZIs, as in [92,93], proving the results reported here in a more direct experiment.…”

Section: Weak Measurement Disturbancementioning

confidence: 99%

“…This approach offers a unique perspective for many quantum phenomena, such as single [12,[29][30][31] and multipartite [32][33][34][35][36] quantum nonlocality as quantum effects stemming from the time-symmetrization of the quantum formalism. Furthermore, the TSVF provides an original approach for addressing the measurement problem and the emergence of classicality [37][38][39]. More interestingly, under special combinations of pre-and postselected states, novel phenomena emerge that a posteriori are obliged by the standard formalism as well [29,40]-yet, they had not been predicted without the TSVF.…”

Section: Introductionmentioning

confidence: 99%

Time-symmetry and topology of the Aharonov–Bohm effect

Aharonov,

Paiva,

Schwartzman-Nowik

et al. 2023

J. Phys. A: Math. Theor.

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The Aharonov-Bohm (AB) effect has been highly influential in fundamental and applied physics. Its topological nature commonly implies that an electron encircling a magnetic flux source in a field-free region must close the loop in order to generate an observable effect. In this paper, we study a variant of the AB effect that apparently challenges this concept. The significance of weak values and nonlocal equations of motion is discussed as part of the analysis, shedding light on and connecting all these fundamental concepts.

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“…Recalling the aforementioned analogy between the double-doubleslit and two measurement pointers measuring the entangled pair of particles, we note that Bob's system might be different from Alice's system in several aspects. Bob's pointer state could be implemented by an electron [22], cold ion [23] or any other quantum system. Moreover, his measuring system could correspond to variable strength coupling and could even have many degrees of freedom.…”

Section: Model For Asymmetric Entangled Double-slit Experimentsmentioning

confidence: 99%

Double Slit with an Einstein–Podolsky–Rosen Pair

et al. 2020

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In this somewhat pedagogical paper we revisit complementarity relations in bipartite quantum systems. Focusing on continuous variable systems, we examine the influential class of EPR-like states through a generalization to Gaussian states and present some new quantitative relations between entanglement and local interference within symmetric and asymmetric double-double-slit scenarios. This approach is then related to ancilla-based quantum measurements, and weak measurements in particular. Finally, we tie up the notions of distinguishability, predictability, coherence and visibility while drawing some specific connections between them. arXiv:2001.07168v1 [quant-ph]

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Demonstration of weak measurements, projective measurements, and quantum-to-classical transitions in ultrafast free electron-photon interactions

Cited by 4 publications

References 0 publications

Imprinting the quantum statistics of photons on free electrons

Imprinting the quantum statistics of photons on free electrons

Time-symmetry and topology of the Aharonov–Bohm effect

Double Slit with an Einstein–Podolsky–Rosen Pair

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