Measurement-induced decoherence and information in double-slit interference

Kincaid, Joshua; McLelland, Kyle; Zwolak, Michael

doi:10.1119/1.4943585

Cited by 6 publications

(3 citation statements)

References 34 publications

(39 reference statements)

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“…This is analogous to placing a weak light source behind the slits of the double slit experiment, as mentioned by Feynman [16]. A recent paper by Kincaid et al [17] lucidly described a wavefunction model for a particle travelling through two slits and being measured to a varying degree after emerging from the slits. In both the double slit experiment as with this model, there is a finite chance of measuring the particle which leads to the interference fringes, the wave-like hallmark of quantum systems, becoming quenched, as Kincaid and coauthors described.…”

Section: Wavefunction Reflectionmentioning

confidence: 99%

Hitting a ball on a spring: a simple model for understanding decoherence with wavefunctions

Schram

Heller

2020

Eur. J. Phys.

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The typical approach to studying decoherence begins by examining a combined system and interacting environment (termed bath), and then deriving a master equation to examine the behaviour of the density matrix after tracing over the bath, typically by invoking the Markovian approximation. This approach is quite successful for a large variety of systems however is frequently a non-intuitive picture that can mask the fundamental behaviour of the system. We examine here a simple model that captures the essence of decoherence and study it using the wavefunction picture, invoking the analytic concepts of the correspondence principle, the method of images, the phase jitter concept, and the scattering matrix formalism. We complement this with a numerical study using the split-operator FFT method, the forced harmonic oscillator method, and the thawed Gaussian approximation.

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Section: Wavefunction Reflectionmentioning

confidence: 99%

Hitting a ball on a spring: a simple model for understanding decoherence with wavefunctions

Schram

Heller

2020

Eur. J. Phys.

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“…Meanwhile, Ref. [36] considered an experimental proposal linking the which-way information in the double-slit experiment and the subsequent interference patterns to quantum Darwinism, but it lacked a clear notion of "multiple observers" or multiple environments that is a key component of quantum Darwinism. Recently, there have been experimental exploration of quantum Darwinism in photonic cluster states [37], photonic quantum simulators [38] and nitrogen vacancy centers [39].…”

Section: Introductionmentioning

confidence: 99%

Witnessing non-objectivity in the framework of strong quantum Darwinism

Le,

Olaya-Castro

2019

Preprint

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Quantum Darwinism is a compelling theory that describes the emergence of objectivity of quantum systems. Spectrum broadcast structure and strong quantum Darwinism are two extensions of quantum Darwinism with emphasis on state structure and information respectively. The complete characterisation of these three frameworks, however, requires quantum state tomography over both the system and accessible environments, thus limiting the feasibility and scalability of experimental tests. Here, we introduce a subspace-dependent objectivity operation and construct a witness that detects non-objectivity by comparing the dynamics of the system-environment state with and without the objectivity operation. We then propose a photonic experimental simulation that implements the witnesssing scheme.

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“…In the double-slit experiment, dissipation can cause the loss of coherence between the different paths taken by the particle, leading to the disappearance of the interference pattern [28]. Then, both decoherence and dissipation are important factors that can affect the behavior of quantum systems [22,29,30]. It is possible that part of the decrease in fringe visibility as a function of temperature reported in [31] is caused by dissipation.…”

mentioning

confidence: 99%

Open quantum behaviour manifested in the double-slit experiment

Marinho,

de Sá Neto,

Sampaio

et al. 2023

EPL

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In certain analyses of quantum systems, it is common to disregard the dissipation eﬀect and focus solely on decoherence. This is because decoherence typically occurs on a much shorter timescale compared to dissipation. However, in order to gain insight into the role of dissipation, we examine the interference pattern in a double-slit experiment while considering both eﬀects. To do so, we establish time scales for decoherence and dissipation and acknowledge the possibility of these eﬀects occurring in close proximity. By comparing the relative intensity and fringe visibility between a purely decoherent model and a model that incorporates both decoherence and dissipation, we make an observation. When the time scales of decoherence and dissipation are similar, there exists a time interval during propagation where dissipation contributes to the faster degradation of quantum features compared to the sole inﬂuence of decoherence. Hence, it is crucial to consider both decoherence and dissipation eﬀects, especially when their time scales are closely aligned, to gain a comprehensive understanding of quantum behavior.

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Measurement-induced decoherence and information in double-slit interference

Cited by 6 publications

References 34 publications

Hitting a ball on a spring: a simple model for understanding decoherence with wavefunctions

Hitting a ball on a spring: a simple model for understanding decoherence with wavefunctions

Witnessing non-objectivity in the framework of strong quantum Darwinism

Open quantum behaviour manifested in the double-slit experiment

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