Interaction-based nonlinear quantum metrology with a cold atomic ensemble
... the fact that light is made of quanta, i.e., the photons, whose bouncing on the mirror surface has an intrinsic quantum randomness [Caves, 1980]. The second reason is more generic, and concerns the fact that every system is quantum in its nature. Unfortunately we are not used to such a vision and we ...
... the fact that light is made of quanta, i.e., the photons, whose bouncing on the mirror surface has an intrinsic quantum randomness [Caves, 1980]. The second reason is more generic, and concerns the fact that every system is quantum in its nature. Unfortunately we are not used to such a vision and we ...
Revisiting the Einstein
... -9prompt and warm embrace of Bose, along with the fact that Bose’s new statistics yielded an elegant, first-principles derivation of the Planck formula for black body radiation. Accepting Bose’s new statistics, however, meant facing up to the fact that the failure of the mutual independence of quan ...
... -9prompt and warm embrace of Bose, along with the fact that Bose’s new statistics yielded an elegant, first-principles derivation of the Planck formula for black body radiation. Accepting Bose’s new statistics, however, meant facing up to the fact that the failure of the mutual independence of quan ...
Interband optical investigation of Bloch oscillations in semiconductor superlattices TOPICAL REVIEW
... the Wannier–Stark ladder was the question whether field localization and the observation of the ladder would be prevented by coupling to higher bands and the continuum: the ladder states are not stationary, since scattering to higher bands and the continuum can take place. The debate whether couplin ...
... the Wannier–Stark ladder was the question whether field localization and the observation of the ladder would be prevented by coupling to higher bands and the continuum: the ladder states are not stationary, since scattering to higher bands and the continuum can take place. The debate whether couplin ...
Introduction to Quantum Physics
... to its absorptivity: e = a . The slot in the box in part (a) of the question is a black body with reflectivity zero and absorptivity 1, so it must also be the most efficient possible radiator, to avoid rising in temperature above its surroundings in thermal equilibrium. Its emissivity in Stefan’s la ...
... to its absorptivity: e = a . The slot in the box in part (a) of the question is a black body with reflectivity zero and absorptivity 1, so it must also be the most efficient possible radiator, to avoid rising in temperature above its surroundings in thermal equilibrium. Its emissivity in Stefan’s la ...
Synthesising arbitrary quantum states in a
... of which each can have a non-zero amplitude. However, this richness is difficult to access when driving a resonator with a classical signal, as the two adjustable parameters of an on-resonant drive, the amplitude and the phase, give very limited control. Creating an arbitrary quantum state instead ...
... of which each can have a non-zero amplitude. However, this richness is difficult to access when driving a resonator with a classical signal, as the two adjustable parameters of an on-resonant drive, the amplitude and the phase, give very limited control. Creating an arbitrary quantum state instead ...
Universitat Autonoma de Barcelona Facultat de Ciencies, Departament de F sica
... cold atoms, solid state systems, trapped ions, or quantum dots. In these systems, quantum information is encoded, for instance, in the internal energy, in the vibrational states, in the position, in the angular momentum or in the spin state. On the other hand, in quantum communication, photons are t ...
... cold atoms, solid state systems, trapped ions, or quantum dots. In these systems, quantum information is encoded, for instance, in the internal energy, in the vibrational states, in the position, in the angular momentum or in the spin state. On the other hand, in quantum communication, photons are t ...
LIGO Magazine, issue 3, 9/2013 - LIGO Scientific Collaboration
... who would have thought? The last year has been exciting and fun, with many excellent contributions and feedback from you, the LSC members. Thank you! In this issue we bring you stories about the squeezing of light. During my first years in gravitational wave science signal, recycling was still new a ...
... who would have thought? The last year has been exciting and fun, with many excellent contributions and feedback from you, the LSC members. Thank you! In this issue we bring you stories about the squeezing of light. During my first years in gravitational wave science signal, recycling was still new a ...
On the Reality of the Quantum State
... third-class. Working 8 hours a day, 6 days a week left him “8 hours for fooling around, and then there’s Sundays” [7]. It was in this free time that the 26 year old, whose name would one day become synonymous with genius, prepared three papers to be published in Annalen der Physik, each of which was ...
... third-class. Working 8 hours a day, 6 days a week left him “8 hours for fooling around, and then there’s Sundays” [7]. It was in this free time that the 26 year old, whose name would one day become synonymous with genius, prepared three papers to be published in Annalen der Physik, each of which was ...
Fault-tolerant quantum repeater with atomic ensembles and linear
... where the relative phase between the entangled states of the two pairs of the remote ensembles is denoted by +* = k+x with +x = xu − xd. In practice, a series of write pulses are sent into the atomic ensembles and the induced Stokes pulses are directed to the detectors. The time interval between nei ...
... where the relative phase between the entangled states of the two pairs of the remote ensembles is denoted by +* = k+x with +x = xu − xd. In practice, a series of write pulses are sent into the atomic ensembles and the induced Stokes pulses are directed to the detectors. The time interval between nei ...
Macroscopic quantum effects based on Kerr nonlinearities
... the macroscopic level as well, to give a definite answer ”yes” there is still a long journey. If it does apply, a direct result is that it predicts highly counter-intuitive macroscopic quantum superpositions and entanglements, which we never experience in our daily lives. In this thesis we assume th ...
... the macroscopic level as well, to give a definite answer ”yes” there is still a long journey. If it does apply, a direct result is that it predicts highly counter-intuitive macroscopic quantum superpositions and entanglements, which we never experience in our daily lives. In this thesis we assume th ...
Classical properties of quantum scattering
... of additional collimators the incident and the detected scattered beams can be separated, thus justifying the above treatment. However, not dismissing his expectation, we point out that those collimators would introduce other scattering elements. Their effect would be difficult to distinguish from t ...
... of additional collimators the incident and the detected scattered beams can be separated, thus justifying the above treatment. However, not dismissing his expectation, we point out that those collimators would introduce other scattering elements. Their effect would be difficult to distinguish from t ...
Experiments with Entangled Photons Bell Inequalities, Non-local Games and Bound Entanglement
... and inseparability of the universe at a larger scale, makes it an astounding subject [1]. Although it contains such bizarre ideas, quantum mechanics has provided the basic framework for the most precise theories in human history. One of the most inexplicable ideas that quantum mechanics introduces i ...
... and inseparability of the universe at a larger scale, makes it an astounding subject [1]. Although it contains such bizarre ideas, quantum mechanics has provided the basic framework for the most precise theories in human history. One of the most inexplicable ideas that quantum mechanics introduces i ...
Quantum Theory: a Pragmatist Approach
... contemporary two-slit interference experiment involving detection of individual particles, some claims will describe the apparatus, while others will describe the results of the experiment. But while claims concerning where individual particles are detected contributing to the interference pattern a ...
... contemporary two-slit interference experiment involving detection of individual particles, some claims will describe the apparatus, while others will describe the results of the experiment. But while claims concerning where individual particles are detected contributing to the interference pattern a ...
on the excess photon noise in single
... f o r m u l a s g i v e n b y R i c e for s q u a r e - l a w detectors. I n Sect. 3 a new h y p o t h e s i s is i n t r o duced in o r d e r to c a l c u l a t e t h e excess p h o t o n noise effect w i t h p h o t o - c o n d u c t i v e cells, in w h i c h t h e s t a t i s t i c s of b o t h t ...
... f o r m u l a s g i v e n b y R i c e for s q u a r e - l a w detectors. I n Sect. 3 a new h y p o t h e s i s is i n t r o duced in o r d e r to c a l c u l a t e t h e excess p h o t o n noise effect w i t h p h o t o - c o n d u c t i v e cells, in w h i c h t h e s t a t i s t i c s of b o t h t ...
Probabilistic interpretation of resonant states
... The phenomenon of resonance has been of great importance in elementaryparticle physics and nuclear physics [3–28]. In recent years, unstable nuclei, which are nothing but resonant states, are experimentally sought after (see e.g., refs [29,30]). It has also been realized in condensed matter physics ...
... The phenomenon of resonance has been of great importance in elementaryparticle physics and nuclear physics [3–28]. In recent years, unstable nuclei, which are nothing but resonant states, are experimentally sought after (see e.g., refs [29,30]). It has also been realized in condensed matter physics ...
Observing a coherent superposition of an atom and a
... pulses over many runs of the experiment, one observes socalled Ramsey fringes—oscillations in the probability of measuring the outcome corresponding to 兩g典 共or 兩e典兲 as a function of . Such Ramsey fringes are the signature of coherent operation, i.e., that the description of the system for the time ...
... pulses over many runs of the experiment, one observes socalled Ramsey fringes—oscillations in the probability of measuring the outcome corresponding to 兩g典 共or 兩e典兲 as a function of . Such Ramsey fringes are the signature of coherent operation, i.e., that the description of the system for the time ...
Lecture-12
... we can use a superposition principle: if E1 and E2 are separately the solutions of the Maxwell's, then λ1 E1 + λ2 E2 is also a solution, where λ1 and λ2 are constants. It is this superposition principle which explains wave phenomena in classical optics (interference, diffraction). In quantum phyiscs ...
... we can use a superposition principle: if E1 and E2 are separately the solutions of the Maxwell's, then λ1 E1 + λ2 E2 is also a solution, where λ1 and λ2 are constants. It is this superposition principle which explains wave phenomena in classical optics (interference, diffraction). In quantum phyiscs ...
Squeezed light
... of producing squeezing. Spontaneous parametric downconversion (SPDC) is a nonlinear optical process in which a photon of a powerful laser field propagating through a second-order nonlinear optical medium may split into two photons of lower energy. The frequencies, wavevectors and polarizations of th ...
... of producing squeezing. Spontaneous parametric downconversion (SPDC) is a nonlinear optical process in which a photon of a powerful laser field propagating through a second-order nonlinear optical medium may split into two photons of lower energy. The frequencies, wavevectors and polarizations of th ...
Quantum noise properties of multiphoton transitions in driven nonlinear resonators
... strongly different from the Boltzmann-type [1, 2, 29]. Peaks or dips in the nonlinear response are a direct consequence of the nonequilibrium distribution over states with different oscillation amplitudes and phases [1, 2, 29]. The signatures of such a characteristic non-Lorentzian line shape of the ...
... strongly different from the Boltzmann-type [1, 2, 29]. Peaks or dips in the nonlinear response are a direct consequence of the nonequilibrium distribution over states with different oscillation amplitudes and phases [1, 2, 29]. The signatures of such a characteristic non-Lorentzian line shape of the ...
Quantum Reflection at Strong Magnetic Fields
... is stable due to the Pauli exclusion principle. Electrons which are removed from this sea by means of a sufficient energy transfer leave behind “holes”, which he associated with positively charged electrons, i.e. positrons, for the first time at the Solvay conference in 1933 [2]. Owing to the uncert ...
... is stable due to the Pauli exclusion principle. Electrons which are removed from this sea by means of a sufficient energy transfer leave behind “holes”, which he associated with positively charged electrons, i.e. positrons, for the first time at the Solvay conference in 1933 [2]. Owing to the uncert ...