Coherent manipulations of charge-number states in a Cooper-pair box Y. Nakamura,
... hand, whether other requirements for quantum computing, such as precise control, accurate quantum-state readout, and long decoherence time, are fulfilled is not guaranteed a priori. Therefore, progresses in experiments to really demonstrate the potential of those qubits are anticipated. In this paper ...
... hand, whether other requirements for quantum computing, such as precise control, accurate quantum-state readout, and long decoherence time, are fulfilled is not guaranteed a priori. Therefore, progresses in experiments to really demonstrate the potential of those qubits are anticipated. In this paper ...
Quantum Mechanical Modeling of the Charge Distribution in a Si Si1
... PFET) is presented. The results are based on a fully self-consistent solution of the one-dimensional, timeindependent, Schrodinger and Poisson equations. The purpose of this work is to demonstrate the dependence of the charge distribution in a SiGe PFET on the Si surface channel thickness (TSi ), t ...
... PFET) is presented. The results are based on a fully self-consistent solution of the one-dimensional, timeindependent, Schrodinger and Poisson equations. The purpose of this work is to demonstrate the dependence of the charge distribution in a SiGe PFET on the Si surface channel thickness (TSi ), t ...
Could light harvesting complexes exhibit non
... protein complex is a trimer in the bacterial species prosthecochloris aestuarii. The theoretical models in the literature (Mohseni et al. 2008; Olaya-Castro et al. 2008; Plenio & Huelga 2008; Caruso et al. 2009; Rebentrost et al. 2009b) apply to the dynamics of one unit of the trimer. The models ass ...
... protein complex is a trimer in the bacterial species prosthecochloris aestuarii. The theoretical models in the literature (Mohseni et al. 2008; Olaya-Castro et al. 2008; Plenio & Huelga 2008; Caruso et al. 2009; Rebentrost et al. 2009b) apply to the dynamics of one unit of the trimer. The models ass ...
Spectral And Dynamical Properties Of Strongly Correlated Systems
... application of Quantum Monte Carlo methods to bosonic problems at the equilibrium is therefore a well consolidated achievement of modern computational physics. [36, 54] However, numerous problems have to be faced when trying to extend these methodologies to other relevant systems. In particular, unv ...
... application of Quantum Monte Carlo methods to bosonic problems at the equilibrium is therefore a well consolidated achievement of modern computational physics. [36, 54] However, numerous problems have to be faced when trying to extend these methodologies to other relevant systems. In particular, unv ...
Field Theory on Curved Noncommutative Spacetimes
... operator algebras. This approach is called deformation quantization [20] and has the advantage that the quantum theory is formulated in terms of the classical objects, thus allowing us to study deviations (perturbations) from the classical situation at every step. Obviously, formal deformation quant ...
... operator algebras. This approach is called deformation quantization [20] and has the advantage that the quantum theory is formulated in terms of the classical objects, thus allowing us to study deviations (perturbations) from the classical situation at every step. Obviously, formal deformation quant ...
kiselev.pdf
... associated with this representation. The method works for dilute systems where all the spins can be considered independently. Unfortunately, attempts to generalize this technique to the lattice of spins results in the replacement of the local constraint (the number of particles on each site is fixed) ...
... associated with this representation. The method works for dilute systems where all the spins can be considered independently. Unfortunately, attempts to generalize this technique to the lattice of spins results in the replacement of the local constraint (the number of particles on each site is fixed) ...
The Classical Lamb Shift: Why Jackson is Wrong!
... At a recent NATO ASI summer school held in Edirne, Turkey, ( 1 ) a discussion developed on how it seemed to be possible to use classical methods to calculate atomic spontaneous emission rates, but not the Lamb shift. This point of view has particularly been emphasized in Jackson’s book, Classical El ...
... At a recent NATO ASI summer school held in Edirne, Turkey, ( 1 ) a discussion developed on how it seemed to be possible to use classical methods to calculate atomic spontaneous emission rates, but not the Lamb shift. This point of view has particularly been emphasized in Jackson’s book, Classical El ...
Observation of a quarter of an electron charge at the n=5/2 quantum
... the topology of the path determines the transformation—that takes the system from one ground state to another. Unitary transformations that correspond to different interchanges do not generally commute with each other; hence the name non-abelian. The topological nature of these transformations makes ...
... the topology of the path determines the transformation—that takes the system from one ground state to another. Unitary transformations that correspond to different interchanges do not generally commute with each other; hence the name non-abelian. The topological nature of these transformations makes ...
Defining and detecting quantum speedup
... it being governed by open system quantum dynamics. It is well understood that the D-Wave devices, just like any other quantum information processing device, must be error-corrected in order to overcome the effects of decoherence and control errors. While such error correction has already been demons ...
... it being governed by open system quantum dynamics. It is well understood that the D-Wave devices, just like any other quantum information processing device, must be error-corrected in order to overcome the effects of decoherence and control errors. While such error correction has already been demons ...
Quantum Nonlinear Optics in Lossy Coupled-Cavities in Photonic Crystal Slabs
... coupled-cavity system in leaky photonic crystal slabs. This is accomplished using a non-Hermitian projection operator, where the coupled-cavity modes, known as quasimodes, are used as a basis. Because of this, intrinsic features of these quasimodes such as the leakage and the non-orthogonality are i ...
... coupled-cavity system in leaky photonic crystal slabs. This is accomplished using a non-Hermitian projection operator, where the coupled-cavity modes, known as quasimodes, are used as a basis. Because of this, intrinsic features of these quasimodes such as the leakage and the non-orthogonality are i ...
![arXiv:math/0606118v4 [math.PR] 5 Dec 2006](http://s1.studyres.com/store/data/013514025_1-1bac3cda767b4b11f4a6d27e549df5b9-300x300.png)
arXiv:math/0606118v4 [math.PR] 5 Dec 2006
... a simple toy model, which requires essentially no analytic machinery. We only assume some background in linear algebra and familiarity with elementary probability theory with martingales, roughly at the level of the inspiring textbook by D. Williams [82]. The model we will investigate likely has a f ...
... a simple toy model, which requires essentially no analytic machinery. We only assume some background in linear algebra and familiarity with elementary probability theory with martingales, roughly at the level of the inspiring textbook by D. Williams [82]. The model we will investigate likely has a f ...
MULTIPARTICLE ENTANGLEMENT Sebastian Hartweg, Mario Berta (QSIT Seminar, 10.12.2012)
... Wissenschaften, , this work the current for in InnsbruckInstitut measurement basis spanned by all der product states of N qubits, each large entangled states in any qubit system. in either j " l or j # l, and can be implemented by generalizing the Otto-Hittmair-Platz 1, A-6020 Innsbruck, Austria One ...
... Wissenschaften, , this work the current for in InnsbruckInstitut measurement basis spanned by all der product states of N qubits, each large entangled states in any qubit system. in either j " l or j # l, and can be implemented by generalizing the Otto-Hittmair-Platz 1, A-6020 Innsbruck, Austria One ...
Microscopic theory for quantum mirages in quantum corrals D. Porras, J. Ferna´ndez-Rossier,
... Scanning tunneling microscopy 共STM兲 allows the manipulation of single atoms on top of a surface1 as well as the construction of quantum structures of arbitrary shape. Additionally, the differential conductance, G(V)⬅dI/dV, is proportional to the local density of states 共LDOS兲 of the surface spot bel ...
... Scanning tunneling microscopy 共STM兲 allows the manipulation of single atoms on top of a surface1 as well as the construction of quantum structures of arbitrary shape. Additionally, the differential conductance, G(V)⬅dI/dV, is proportional to the local density of states 共LDOS兲 of the surface spot bel ...
Tonks–Girardeau gas of ultracold atoms in an optical lattice
... whenever two particles occupy the same position in space. However, the absolute value of the determinant ensures that the wavefunction for the bosons remains completely symmetric. This wavefunction reflects the fundamental similarities between strongly interacting bosons and non-interacting fermions ...
... whenever two particles occupy the same position in space. However, the absolute value of the determinant ensures that the wavefunction for the bosons remains completely symmetric. This wavefunction reflects the fundamental similarities between strongly interacting bosons and non-interacting fermions ...
Single defect centres in diamond: A review
... be an electron paramagnetic system with S = 1/2 ground state [17]. Nitrogen aggregates are, most commonly, pairs of neighbouring substitutional atoms, the A aggregates, and groups of four around a vacancy, the B aggregate. All three forms of nitrogen impurities have distinct infrared spectra. Anothe ...
... be an electron paramagnetic system with S = 1/2 ground state [17]. Nitrogen aggregates are, most commonly, pairs of neighbouring substitutional atoms, the A aggregates, and groups of four around a vacancy, the B aggregate. All three forms of nitrogen impurities have distinct infrared spectra. Anothe ...
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.