Decoherence and open quantum systems
... In quantum information theory entanglement is used as a source for many different applications, for instance in quantum cryptography, teleportation schemes or quantum computation. To keep this entanglement in the system as long as possible we have to protect it against different environmental influe ...
... In quantum information theory entanglement is used as a source for many different applications, for instance in quantum cryptography, teleportation schemes or quantum computation. To keep this entanglement in the system as long as possible we have to protect it against different environmental influe ...
In Search of Quantum Reality
... 1.3.1.7 The Determinate Universe . . . . . . . . . . . . . Through the Looking Glass: The Quantum Point of View . . . . . . . . . . . . . . . . . . . . . . 1.4.1 When is a Particle Not a Particle? . . . . . . . . . . . . . . 1.4.1.1 The Decline and Fall of the Trajectory . . . . . . 1.4.1.2 Classica ...
... 1.3.1.7 The Determinate Universe . . . . . . . . . . . . . Through the Looking Glass: The Quantum Point of View . . . . . . . . . . . . . . . . . . . . . . 1.4.1 When is a Particle Not a Particle? . . . . . . . . . . . . . . 1.4.1.1 The Decline and Fall of the Trajectory . . . . . . 1.4.1.2 Classica ...
annual report 2015 - ARC Centre of Excellence for Engineered
... Quantum mechanics provides the functionality of nearly every technology around us. Our understanding of this fundamental physical theory has given us the information revolution, home computers, iPhones, GPS, atomic clocks and Magnetic Resonance Imaging (MRI). From flat-panel monitors to optical netw ...
... Quantum mechanics provides the functionality of nearly every technology around us. Our understanding of this fundamental physical theory has given us the information revolution, home computers, iPhones, GPS, atomic clocks and Magnetic Resonance Imaging (MRI). From flat-panel monitors to optical netw ...
Fast converging path integrals for time-dependent potentials
... Note that the O(1/N) convergence can be also achieved with other choices of space– time points at which we evaluate the potential in equation (2.7). For example, the left or the right prescription xn = qn , τn = tn or xn = qn+1 , τn+1 = tn+1 is often used for the spatio-temporal argument of the pote ...
... Note that the O(1/N) convergence can be also achieved with other choices of space– time points at which we evaluate the potential in equation (2.7). For example, the left or the right prescription xn = qn , τn = tn or xn = qn+1 , τn+1 = tn+1 is often used for the spatio-temporal argument of the pote ...
Semiclassical approximations in wave mechanics
... T h e difficulty of solving a given problem in ‘semiclassical mechanics’ is, fairly obviously, directly related to the complexity of the pattern of classical paths. I n particular, we shall find time and again that it is the topology of the orbits that affects the form of the semiclassical expressio ...
... T h e difficulty of solving a given problem in ‘semiclassical mechanics’ is, fairly obviously, directly related to the complexity of the pattern of classical paths. I n particular, we shall find time and again that it is the topology of the orbits that affects the form of the semiclassical expressio ...
Atoms, photons, and Information
... that already present in the uncoupled system. In a similar vein we prove that a single photon traveling wave pulse cannot ever excite an atom with unit probability due to decoherence, and calculate the maximum probability of excitation for the atomic system driven by such a pulse. Entanglement can b ...
... that already present in the uncoupled system. In a similar vein we prove that a single photon traveling wave pulse cannot ever excite an atom with unit probability due to decoherence, and calculate the maximum probability of excitation for the atomic system driven by such a pulse. Entanglement can b ...
Entangled Photons and Bell`s Inequality
... We report on an effort to verify quantum nonlocality through a violation of Bell’s inequality using polarization-entangled photons. When light is directed through a type 1 beta barium borate (BBO) crystal, a small fraction of the incident photons (on the order of 10−10 ) undergo spontaneous parametr ...
... We report on an effort to verify quantum nonlocality through a violation of Bell’s inequality using polarization-entangled photons. When light is directed through a type 1 beta barium borate (BBO) crystal, a small fraction of the incident photons (on the order of 10−10 ) undergo spontaneous parametr ...
diatomic molecular spectroscopy with standard and anomalous
... In modern notation, approximate diatomic angular momentum states are represented by elements of the rotation matrix, DMJ *Ω ( αβγ ) , which carry two magnetic quantum numbers, one more than allowed by the nature of angular momentum. Only J2 and one of its components, by usual convention Jz , commute ...
... In modern notation, approximate diatomic angular momentum states are represented by elements of the rotation matrix, DMJ *Ω ( αβγ ) , which carry two magnetic quantum numbers, one more than allowed by the nature of angular momentum. Only J2 and one of its components, by usual convention Jz , commute ...
Computational Methods for Simulating Quantum Computers
... qubits) but are significantly larger than the experimental machines that have been built. Therefore it is striking that theoretical ideas about quantum computation are seldom confronted with numerical experiments that can be carried out on present-day (super) computers. Conventional computers can sim ...
... qubits) but are significantly larger than the experimental machines that have been built. Therefore it is striking that theoretical ideas about quantum computation are seldom confronted with numerical experiments that can be carried out on present-day (super) computers. Conventional computers can sim ...
Quantum Computational Complexity - Cheriton School of Computer
... within the quantum circuit model, this article includes a section that focuses on basic properties of quantum circuits that are important in the setting of quantum complexity. A selection of other topics in quantum complexity, including quantum advice, space-bounded quantum computation, and bounded- ...
... within the quantum circuit model, this article includes a section that focuses on basic properties of quantum circuits that are important in the setting of quantum complexity. A selection of other topics in quantum complexity, including quantum advice, space-bounded quantum computation, and bounded- ...
Manifestations of Berry`s phase in molecules and condensed matter
... Since the first one appeared in 1983, a plethora of publications have dealt with the theory of geometric quantum phases and its applications in various fields. A very useful book [2] containing reprints and some original articles was published in 1989. Other useful publications of various kinds exist: ...
... Since the first one appeared in 1983, a plethora of publications have dealt with the theory of geometric quantum phases and its applications in various fields. A very useful book [2] containing reprints and some original articles was published in 1989. Other useful publications of various kinds exist: ...
23 - Electronic Colloquium on Computational Complexity
... even though if you were to close one of the slits, the photon would have some nonzero probability to appear at that location. 2. Measurements. Quantum states can’t exist forever in the abstract realm. At some point we have to measure them. The most basic type of measurement we can do is with respec ...
... even though if you were to close one of the slits, the photon would have some nonzero probability to appear at that location. 2. Measurements. Quantum states can’t exist forever in the abstract realm. At some point we have to measure them. The most basic type of measurement we can do is with respec ...
Defining and detecting quantum speedup
... consensus may be time- and community-dependent [14]. In the absence of a consensus about what is the best classical algorithm, we define potential (quantum) speedup as a speedup compared to a specific classical algorithm or a set of classical algorithms. An example is the simulation of the time evol ...
... consensus may be time- and community-dependent [14]. In the absence of a consensus about what is the best classical algorithm, we define potential (quantum) speedup as a speedup compared to a specific classical algorithm or a set of classical algorithms. An example is the simulation of the time evol ...
Elliptic Curve Cryptography and Quantum Computing
... more than one input. However, an elliptic curve may have two outputs for every one input thus making it not a function. We can see this in Figure 1. ...
... more than one input. However, an elliptic curve may have two outputs for every one input thus making it not a function. We can see this in Figure 1. ...
Spin and Charge Transport through Driven Quantum Dot Systems
... dimensional conductors–, single atomic or molecular junctions. Among them, quantum dots deserve special importance for being a realization of zero dimensional systems with a discrete energy distribution. For this reason, they are also know as artificial atoms[2, 3, 4, 5], with the particularity that ...
... dimensional conductors–, single atomic or molecular junctions. Among them, quantum dots deserve special importance for being a realization of zero dimensional systems with a discrete energy distribution. For this reason, they are also know as artificial atoms[2, 3, 4, 5], with the particularity that ...