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Using a first principles approach, we study the electron transport properties of a new class of molecular wires containing fluorenone units, whose features open up new possibilities for controlling transport through a single molecule. We…

介观与纳米尺度物理 · 物理学 2007-05-23 C. J. Lambert , I. M. Grace , T. Papadopoulos

Measuring an electric field waveform beyond radio frequencies is often accomplished via a second-order nonlinear interaction with a laser pulse shorter than half of the field's oscillation period. However, synthesizing such a gate pulse is…

A nonlinear interferometry scheme is described theoretically to induce and resolve electron wave- function beating on time scales shorter than the optical cycle of the time-delayed pump and probe pulses. By employing two moderately intense…

化学物理 · 物理学 2017-08-23 Christian Ott , Philipp Raith , Thomas Pfeifer

Fano resonances are ubiquitous phenomena appearing in many fields of physics, e.g. atomic or molecular photoionization, or electron transport in quantum dots. Recently, attosecond interferometric techniques have been used to measure the…

We present a method for determining the phase and contrast of a single shot of an atom interferometer. The application of a phase shear across the atom ensemble yields a spatially varying fringe pattern at each output port, which can be…

In this paper we compare the performance of multi and single-mode interferometry for the estimation of the phase of the complex visibility. We provide a theoretical description of the interferometric signal which enables to derive the phase…

天体物理仪器与方法 · 物理学 2015-05-19 E. Tatulli , N. Blind , J. P. Berger , A. Chelli , F. Malbet

The sensitivity in optical interferometry is strongly affected by losses during the signal propagation or at the detection stage. The optimal quantum states of the probing signals in the presence of loss were recently found. However, in…

Phase diffusion represents a crucial obstacle towards the implementation of high precision interferometric measurements and phase shift based communication channels. Here we present a nearly optimal interferometric scheme based on homodyne…

We report a theoretical and experimental study on the role of indistinguishability in the estimation of an interferometric phase. In particular, we show that the quantum Fisher information, which limits the maximum precision achievable in…

Single molecule FRET (fluorescence resonance energy transfer) is a powerful technique for detecting real-time conformational changes and molecular interactions during biological reactions. In this review, we examine different techniques of…

生物大分子 · 定量生物学 2007-05-23 Ivan Rasnik , Sean A. McKinney , Taekjip Ha

Atom interferometers measure quantum interference patterns in the wave functions of cold atoms that follow superpositions of different space-time trajectories. These can be sensitive to phase shifts induced by fundamental physics processes…

宇宙学与河外天体物理 · 物理学 2025-01-16 Oliver Buchmueller , John Ellis , Ulrich Schneider

A simple, low-cost millimeter-wave (70 GHz) interferometer with a phase accuracy better than plus or minur 2 degrees, and a response time of 10 ns is described. The simplicity of this interferometer makes it ideal for measurement of…

仪器与探测器 · 物理学 2020-02-27 M. Gilmore , W. Gekelman , K. Reiling , W. A. Peebles

The concerted motion of two or more bound electrons governs atomic and molecular non-equilibrium processes and chemical reactions. It is thus a long-standing scientific dream to measure the dynamics of two bound correlated electrons in the…

We present an electrically tunable terahertz two dimensional plasmonic interferometer with an integrated detection element that down converts the terahertz fields to a DC signal. The integrated detector utilizes a resonant plasmonic…

介观与纳米尺度物理 · 物理学 2016-05-11 Gregory C. Dyer , Gregory R. Aizin , S. James Allen , Albert D. Grine , Don Bethke , John L. Reno , Eric A. Shaner

Photoelectron interferometry with femto- and atto-second light pulses is a powerful probe of the fast electron wavepacket dynamics, albeit it has practical limitations on the energy resolution. We show that one can simultaneously obtain…

原子物理 · 物理学 2022-02-24 A. Plunkett , M. A. Alarcon , J. K. Wood , C. H. Greene , A. Sandhu

Interferometry can measure the shape or the material density of a system that could not be measured otherwise by recording the difference between the phase change of a signal and a reference phase. This difference is always between $-\pi$…

等离子体物理 · 物理学 2022-10-20 Pierre-Alexandre Gourdain , Aidan Bachmann

Wave front sensing of the surface of equal phase for a propagating electromagnetic wave is a vital technology in fields ranging from real time adaptive optics, to high accuracy metrology, to medical optometry. We have developed a new method…

光学 · 物理学 2025-10-01 C. L. Carilli , L. Torino , B. Nikolic , N. Thyagarajan , U. Iriso

Tommey and Hogan [Phys. Rev. A, 104, 033305 (2021)] have reported a matter-wave interference experiment using Rydberg atoms traveling through inhomogeneous electric fields at approximately 2000 m/s. Using a simplified model containing the…

原子物理 · 物理学 2026-05-15 D. Z. Chan , J. D. D. Martin

Electric charge detection by atomic force microscopy (AFM) with single- electron resolution (e-EFM) is a promising way to investigate the electronic level structure of individual quantum dots (QD). The oscillating AFM tip modulates the…

介观与纳米尺度物理 · 物理学 2017-01-10 Yoichi Miyahara , Antoine Roy-Gobeil , Peter Grutter

We consider the nanoscale electronic phase separation in a wide class of different materials, mostly in strongly correlated electron systems. The phase separation turns out to be quite ubiquitous manifesting itself in different situations,…

强关联电子 · 物理学 2021-11-17 M. Yu. Kagan , K. I. Kugel , A. L. Rakhmanov