scholarly journals On the quantum-mechanics of a single photon

2018 ◽  
Vol 59 (11) ◽  
pp. 112302 ◽  
Author(s):  
Michael K.-H. Kiessling ◽  
A. Shadi Tahvildar-Zadeh
Keyword(s):  
Quantum Mechanics ◽  
Single Photon

Quantum Mechanics in the Single Photon Laboratory

2020 ◽  
Author(s):  
Muhammad Hamza Waseem ◽  
Faizan-e-Ilahi ◽  
Muhammad Sabieh Anwar
Keyword(s):  
Quantum Mechanics ◽  
Single Photon

Correlation optics at the single-photon level: device physics and quantum mechanics

2002 ◽  
Author(s):  
William T. Rhodes ◽  
Angela M. Guzman ◽  
Jean-Pierre Goedgebuer
Keyword(s):  
Quantum Mechanics ◽  
Single Photon ◽  
Device Physics

scholarly journals Direct counterfactual communication via quantum Zeno effect

2017 ◽  
Vol 114 (19) ◽  
pp. 4920-4924 ◽  
Author(s):  
Yuan Cao ◽  
Yu-Huai Li ◽  
Zhu Cao ◽  
Juan Yin ◽  
Yu-Ao Chen ◽  
...  
Keyword(s):  
Wave Function ◽  
Quantum Mechanics ◽  
Theoretical Study ◽  
Single Photon ◽  
Single Photon Source ◽  
Quantum Zeno Effect ◽  
Channel One ◽  
Zeno Effect ◽  
Wave Particle Duality ◽  
Photon Source

Intuition from our everyday lives gives rise to the belief that information exchanged between remote parties is carried by physical particles. Surprisingly, in a recent theoretical study [Salih H, Li ZH, Al-Amri M, Zubairy MS (2013) Phys Rev Lett 110:170502], quantum mechanics was found to allow for communication, even without the actual transmission of physical particles. From the viewpoint of communication, this mystery stems from a (nonintuitive) fundamental concept in quantum mechanics—wave-particle duality. All particles can be described fully by wave functions. To determine whether light appears in a channel, one refers to the amplitude of its wave function. However, in counterfactual communication, information is carried by the phase part of the wave function. Using a single-photon source, we experimentally demonstrate the counterfactual communication and successfully transfer a monochrome bitmap from one location to another by using a nested version of the quantum Zeno effect.

scholarly journals Wave Function Collapse in Atomic Physics

1993 ◽  
Vol 46 (1) ◽  
pp. 77 ◽  
Author(s):  
DT Pegg
Keyword(s):  
Wave Function ◽  
Quantum Mechanics ◽  
Quantum Optics ◽  
Phase Difference ◽  
Atomic Physics ◽  
Single Photon ◽  
Single Atom ◽  
Considerable Time ◽  
Wave Function Collapse ◽  
Statistical Results

Wave function collapse has been a contentious concept in quantum mechanics for a considerable time. Here we show examples of how the concept can be used to advantage in predicting the statistical results of three experiments in atomic physics and quantum optics: photon antibunching, single-photon phase difference states and interrupted single-atom fluorescence. We examine the question of whether or not collapse is 'really' a physical process, and discuss the consequences of simply omitting it but including the observer as a part of the overall system governed by the laws of quantum mechanics. The resulting entangled world does not appear to be inconsistent with experience.

Simplest Quantum Devices: Polarizers and Beam Splitters

2020 ◽  
pp. 137-153
Author(s):  
M. Suhail Zubairy
Keyword(s):  
Quantum Mechanics ◽  
Electromagnetic Wave ◽  
Single Photon ◽  
Polarized Light ◽  
Polarization Property ◽  
Quantum Devices ◽  
Beam Splitters ◽  
Electric And Magnetic Fields ◽  
Basic Features ◽  
Polarization Of Light

Maxwell showed that light consists of electric and magnetic fields that oscillate in directions perpendicular to the direction of propagation. Associated with this picture of light as an electromagnetic wave is an important property—the polarization of light. The polarization of light is related to the direction of oscillation of the electric field in an electromagnetic wave. In this chapter, the basic principles of quantum mechanics are discussed by studying the polarization property of a single photon. First the properties of a polarizer are presented and Malus’ law for polarized light is derived. Next it is shown that the basic features of quantum mechanics can be understood via an analysis of a single photon passing through a polarizer. This simple system allows an introduction of Dirac’s ket and bra notations for a quantum state. Finally the transformation properties of the quantum beam splitter and the polarization beam splitters are discussed.

Color Centers in Diamond as Practical Single-Photon Source to Illustrate Quantum Complementarity

2006 ◽  
Vol 956 ◽  
Author(s):  
Vincent Jacques ◽  
Steven Regnnie ◽  
Dominique Chauvat ◽  
Jean-François Roch
Keyword(s):  
Quantum Mechanics ◽  
Recent Experiment ◽  
Single Photon ◽  
Color Centers ◽  
Single Photon Source ◽  
Fringe Visibility ◽  
Interference Experiment ◽  
Complementarity Principle ◽  
Path Information ◽  
Photon Source

ABSTRACTA recent experiment performed by S. S. Afshar [reviewed in M. Chown, New Scientist183, 30 (2004)] has been interpreted as a possible violation of the complementarity principle of quantum mechanics. Starting from a single-photon wavefront-splitting interference experiment, we propose a new scheme for Afshar's experiment, and we show that Afshar's interpretation is incorrect. Furthermore, this design is well suited to illustrate the complementarity inequality in the interesting intermediate regimes with partial fringe visibility and partial which-path information.

scholarly journals LOGICAL ANALYSIS OF THE BOHR COMPLEMENTARITY PRINCIPLE IN AFSHAR'S EXPERIMENT UNDER THE NAFL INTERPRETATION

2010 ◽  
Vol 08 (03) ◽  
pp. 465-491 ◽  
Author(s):  
RADHAKRISHNAN SRINIVASAN
Keyword(s):  
Quantum Mechanics ◽  
Single Photon ◽  
Logical Truth ◽  
Physical Reality ◽  
Interpretation Of Quantum Mechanics ◽  
Complementarity Principle ◽  
Path Information ◽  
Wave Nature ◽  
Classical Path ◽  
Particle Nature

The NAFL (non-Aristotelian finitary logic) interpretation of quantum mechanics requires that no "physical" reality can be ascribed to the wave nature of the photon. The NAFL theory QM, formalizing quantum mechanics, treats the superposed state (S) of a single photon taking two or more different paths at the same time as a logical contradiction that is formally unprovable in QM. Nevertheless, in a nonclassical NAFL model for QM in which the law of noncontradiction fails, S has a meaningful metamathematical interpretation that the classical path information for the photon is not available. It is argued that the existence of an interference pattern does not logically amount to a proof of the self-interference of a single photon. This fact, when coupled with the temporal nature of NAFL truth, implies the logical validity of the retroactive assertion of the path information (and the logical superfluousness of the grid) in Afshar's experiment. The Bohr complementarity principle, when properly interpreted with the time dependence of logical truth taken into account, holds in Afshar's experiment. NAFL supports, but not demands, a metalogical reality for the particle nature of the photon even when the semantics of QM requires the state S.

scholarly journals Extension to de Broglie Formula of Quantum Mechanics

2015 ◽  
Vol 50 ◽  
pp. 50-60 ◽  
Author(s):  
Zhong Yue Wang
Keyword(s):  
Quantum Mechanics ◽  
Wave Vector ◽  
Quantum Physics ◽  
Cherenkov Radiation ◽  
Single Photon ◽  
Convincing Evidence ◽  
Phase Constant ◽  
Fundamental Equations

Planck-Einstein’s and de Broglie’s are two fundamental equations of quantum physics. But vacuum Cherenkov radiation (VCR) is convincing evidence that the momentum of a single photon should be where the phase constant takes the place of the wave vector . Apart from the momentum, the operator is associated to . The acousto-optic effect and anomalous VCR can be applied to test this conjecture.

scholarly journals Quantum erasing the memory of Wigner's friend

Quantum ◽  
2021 ◽  
Vol 5 ◽  
pp. 498
Author(s):  
Cyril Elouard ◽  
Philippe Lewalle ◽  
Sreenath K. Manikandan ◽  
Spencer Rogers ◽  
Adam Frank ◽  
...  
Keyword(s):  
Quantum Mechanics ◽  
Closed System ◽  
Single Photon ◽  
The Self ◽  
Necessary Condition ◽  
The Core ◽  
Full Control ◽  
Wigner’S Friend ◽  
Quantum Erasure ◽  
Self Consistency

The Wigner's friend paradox concerns one of the most puzzling problems of quantum mechanics: the consistent description of multiple nested observers. Recently, a variation of Wigner's gedankenexperiment, introduced by Frauchiger and Renner, has lead to new debates about the self-consistency of quantum mechanics. At the core of the paradox lies the description of an observer and the object it measures as a closed system obeying the Schrödinger equation. We revisit this assumption to derive a necessary condition on a quantum system to behave as an observer. We then propose a simple single-photon interferometric setup implementing Frauchiger and Renner's scenario, and use the derived condition to shed a new light on the assumptions leading to their paradox. From our description, we argue that the three apparently incompatible properties used to question the consistency of quantum mechanics correspond to two logically distinct contexts: either one assumes that Wigner has full control over his friends' lab, or conversely that some parts of the labs remain unaffected by Wigner's subsequent measurements. The first context may be seen as the quantum erasure of the memory of Wigner's friend. We further show these properties are associated with observables which do not commute, and therefore cannot take well-defined values simultaneously. Consequently, the three contradictory properties never hold simultaneously.

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