Revealing novel quantum phases in quantum antiferromagnets on
... This idea brings naturally to the investigation of the effect of disorder on quantum critical phenomena in magnetic systems, and in particular on magnetic BEC as a paradigmatic magnetic quantum phase transition [9–12]. Introducing disorder in the magnetically ordered phase immediately close to the c ...
... This idea brings naturally to the investigation of the effect of disorder on quantum critical phenomena in magnetic systems, and in particular on magnetic BEC as a paradigmatic magnetic quantum phase transition [9–12]. Introducing disorder in the magnetically ordered phase immediately close to the c ...
QUESTION BANK ON ATOMIC STRUCTURE-3.pmd
... Q68. The probability of finding an electron in the px orbital is (A) zero at nucleus (B) the same on all the sides around nucleus (C) zero on the z-axis (D) maximum on the two opposite sides of the nucleus along the x-axis Q69. The spin of the electron (A) increases the angular momentum (B) decrease ...
... Q68. The probability of finding an electron in the px orbital is (A) zero at nucleus (B) the same on all the sides around nucleus (C) zero on the z-axis (D) maximum on the two opposite sides of the nucleus along the x-axis Q69. The spin of the electron (A) increases the angular momentum (B) decrease ...
discovery and study of quantum
... During this scientific discovery J.J. Thomson was awarded the Nobel Prize in physics for 1906 [3, 5]. The quantitative value of the negative charge of an electron e0=1.602·10-19 K is a global constant has been determined empirically with a surprisingly high degree of accuracy (with measurement error ...
... During this scientific discovery J.J. Thomson was awarded the Nobel Prize in physics for 1906 [3, 5]. The quantitative value of the negative charge of an electron e0=1.602·10-19 K is a global constant has been determined empirically with a surprisingly high degree of accuracy (with measurement error ...
Rational Quantum Physics R. N. Boyd, Ph. D., USA “There is good
... which occurs is experienced by matter as the pressing-down force we call gravitation. Tesla realized through experiment that certain of these incoming aether flux "waves" were arriving with unfailing regularity. He realized that the instances where he had obtained zero output readings were those cas ...
... which occurs is experienced by matter as the pressing-down force we call gravitation. Tesla realized through experiment that certain of these incoming aether flux "waves" were arriving with unfailing regularity. He realized that the instances where he had obtained zero output readings were those cas ...
Ground State Structure in Supersymmetric Quantum Mechanics* Qv
... nonzero eigenspace of H gives a vanishing contribution to (1.9). On the other hand, zero modes of H are zero modes of Q, and (1.9) follows. We consider here two examples with qualitatively different vacuum structures. The first model is a quantum mechanics version of the N = 1 Wess-Zumino field theo ...
... nonzero eigenspace of H gives a vanishing contribution to (1.9). On the other hand, zero modes of H are zero modes of Q, and (1.9) follows. We consider here two examples with qualitatively different vacuum structures. The first model is a quantum mechanics version of the N = 1 Wess-Zumino field theo ...
Generalized binomial distribution in photon statistics
... associated with intensity fluctuations. As shown in Sections IV-V, the photon bunching effect in the BE statistics is rather similar to the quantum interference effect, which was first observed in [2]. The problem considered in this work is stated in Section II, which also contains the basic formula ...
... associated with intensity fluctuations. As shown in Sections IV-V, the photon bunching effect in the BE statistics is rather similar to the quantum interference effect, which was first observed in [2]. The problem considered in this work is stated in Section II, which also contains the basic formula ...
DY 61.1–61.8 - DPG
... or as sensor device. However, in real experiments slight deformations destroy mirror-reflection symmetry either intended or unintended via production tolerances. Therefore we have generalized the perturbation theory for microdisk cavities to treat such asymmetric deformations. This allows us to desc ...
... or as sensor device. However, in real experiments slight deformations destroy mirror-reflection symmetry either intended or unintended via production tolerances. Therefore we have generalized the perturbation theory for microdisk cavities to treat such asymmetric deformations. This allows us to desc ...
Interface between path and orbital angular momentum
... while restricting ourselves to qubit-subspace measurements. In our experiment this approach corresponds to the measurements of all visibilities in all two-dimensional subspaces that is for l-values of 0/ 3, 0/ þ 3 and 3/ þ 3. The best statistical significance for genuine qutrit entanglement was f ...
... while restricting ourselves to qubit-subspace measurements. In our experiment this approach corresponds to the measurements of all visibilities in all two-dimensional subspaces that is for l-values of 0/ 3, 0/ þ 3 and 3/ þ 3. The best statistical significance for genuine qutrit entanglement was f ...
Green`s Functions and Their Applications to Quantum Mechanics
... The intent of this paper is to give the unfamiliar reader some insight toward Green’s functions, specifically in how they apply to quantum mechanics. I plan to introduce some of the fundamentals of quantum mechanics in a rather unconventional way. Since this paper is meant to have a stronger focus o ...
... The intent of this paper is to give the unfamiliar reader some insight toward Green’s functions, specifically in how they apply to quantum mechanics. I plan to introduce some of the fundamentals of quantum mechanics in a rather unconventional way. Since this paper is meant to have a stronger focus o ...
Lasers
... a selection of currently active research topics: laser cooling, photonic bandgap structures, extreme optics, quantum information and other topics ...
... a selection of currently active research topics: laser cooling, photonic bandgap structures, extreme optics, quantum information and other topics ...
PPT
... Corollary: strict positiveness of ER∞ How we construct the An’s : we measure each copy with a local informationally complete POVM M to obtain an empirical estimate n of the state. If ...
... Corollary: strict positiveness of ER∞ How we construct the An’s : we measure each copy with a local informationally complete POVM M to obtain an empirical estimate n of the state. If ...
Quantum coding with finite resources
... this asymptotic characterization is insufficient in practical scenarios where decoherence severely limits our ability to manipulate large quantum systems in the encoder and decoder. In practical settings, we should instead focus on the optimal trade-off between three parameters: the rate of the code, ...
... this asymptotic characterization is insufficient in practical scenarios where decoherence severely limits our ability to manipulate large quantum systems in the encoder and decoder. In practical settings, we should instead focus on the optimal trade-off between three parameters: the rate of the code, ...
Quantum key distribution
Quantum key distribution (QKD) uses quantum mechanics to guarantee secure communication. It enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages. It is often incorrectly called quantum cryptography, as it is the most well known example of the group of quantum cryptographic tasks.An important and unique property of quantum key distribution is the ability of the two communicating users to detect the presence of any third party trying to gain knowledge of the key. This results from a fundamental aspect of quantum mechanics: the process of measuring a quantum system in general disturbs the system. A third party trying to eavesdrop on the key must in some way measure it, thus introducing detectable anomalies. By using quantum superpositions or quantum entanglement and transmitting information in quantum states, a communication system can be implemented which detects eavesdropping. If the level of eavesdropping is below a certain threshold, a key can be produced that is guaranteed to be secure (i.e. the eavesdropper has no information about it), otherwise no secure key is possible and communication is aborted.The security of encryption that uses quantum key distribution relies on the foundations of quantum mechanics, in contrast to traditional public key cryptography which relies on the computational difficulty of certain mathematical functions, and cannot provide any indication of eavesdropping at any point in the communication process, or any mathematical proof as to the actual complexity of reversing the one-way functions used. QKD has provable security based on information theory, and forward secrecy.Quantum key distribution is only used to produce and distribute a key, not to transmit any message data. This key can then be used with any chosen encryption algorithm to encrypt (and decrypt) a message, which can then be transmitted over a standard communication channel. The algorithm most commonly associated with QKD is the one-time pad, as it is provably secure when used with a secret, random key. In real world situations, it is often also used with encryption using symmetric key algorithms like the Advanced Encryption Standard algorithm. In the case of QKD this comparison is based on the assumption of perfect single-photon sources and detectors, that cannot be easily implemented.