Topological Quantum Computing - Quantum Optics Group at ETH
... condense into more elaborate quantized states give a satisfactory explanation of the other values of ν (Haldane, 1983; Halperin, 1984; Prange and Girvin, 1990). Since anyons carry fractional spin and angular momentum is a conserved quantity, single anyons cannot be created from vacuum or annihilate ...
... condense into more elaborate quantized states give a satisfactory explanation of the other values of ν (Haldane, 1983; Halperin, 1984; Prange and Girvin, 1990). Since anyons carry fractional spin and angular momentum is a conserved quantity, single anyons cannot be created from vacuum or annihilate ...
Selection rules and transition moment integral
... In an atom or molecule, an electromagnetic wave (for example, visible light) can induce an oscillating electric or magnetic moment. If the frequency of the induced electric or magnetic moment is the same as the energy difference between one eigenstate Ψ1 and another eigenstate Ψ2, the interaction be ...
... In an atom or molecule, an electromagnetic wave (for example, visible light) can induce an oscillating electric or magnetic moment. If the frequency of the induced electric or magnetic moment is the same as the energy difference between one eigenstate Ψ1 and another eigenstate Ψ2, the interaction be ...
Steady-state entanglement of two atoms created by classical driving
... and high amount of entanglement 共as close to perfect entanglement as possible兲. However, in many cases entanglement of two-level atoms is not stable enough. In the case of atoms trapped in high-quality cavities, absence of stability is caused mainly by Rabi oscillations. In free space, entanglement ...
... and high amount of entanglement 共as close to perfect entanglement as possible兲. However, in many cases entanglement of two-level atoms is not stable enough. In the case of atoms trapped in high-quality cavities, absence of stability is caused mainly by Rabi oscillations. In free space, entanglement ...
RSC_QTECR_ch005 105..131
... The challenge to theory is the difficulty to accurately determine the small difference in free energy of activation due to isotope replacements. This is further exacerbated by the complexity and size of an enzyme system that requires statistical averaging. The computational accuracy demands both an ade ...
... The challenge to theory is the difficulty to accurately determine the small difference in free energy of activation due to isotope replacements. This is further exacerbated by the complexity and size of an enzyme system that requires statistical averaging. The computational accuracy demands both an ade ...
FEATURE ARTICLE
... interest in these techniques,53,54 and also their applicability in an ab initio context is being investigated.55,56 Although the high degree of reliability of the DFT calculations based on the present functionals, usually referred to as generalized gradient approximations (GGA), and their computatio ...
... interest in these techniques,53,54 and also their applicability in an ab initio context is being investigated.55,56 Although the high degree of reliability of the DFT calculations based on the present functionals, usually referred to as generalized gradient approximations (GGA), and their computatio ...
Terahertz quantum cascade lasers operating up to ∼ 200 K with
... The upper lasing state lifetime, set by LO phonon emission, is τul = 0.45 ps at kinetic energy ELO − Eul . Figure 1b shows the DM calculation results of the gain spectra of the same design at different electric fields for a lattice temperature of 10 K [27]. The DM model predicts that the energy posi ...
... The upper lasing state lifetime, set by LO phonon emission, is τul = 0.45 ps at kinetic energy ELO − Eul . Figure 1b shows the DM calculation results of the gain spectra of the same design at different electric fields for a lattice temperature of 10 K [27]. The DM model predicts that the energy posi ...
Symmetry In The Dissociative Recombination Of Polyatomic Ions
... Finally, we investigate the role of symmetries in few body ultra-cold collisions by considering both three and four identical atoms systems. We derive allowed rearrangements of dierent fragments of the system, satisfying the complete symmetry of the molecular Hamiltonian. For that purpose we establ ...
... Finally, we investigate the role of symmetries in few body ultra-cold collisions by considering both three and four identical atoms systems. We derive allowed rearrangements of dierent fragments of the system, satisfying the complete symmetry of the molecular Hamiltonian. For that purpose we establ ...
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... e 1/3 ) quantum queries We prove Theorem 1.1 in two parts. First, in Section 3.1 we prove that with O(m it is possible to test whether a black-box distribution Pf (defined by some f : [n] → [m]) is close to uniform. We actually prove that this can be even done tolerantly in a sense, meaning that a d ...
... e 1/3 ) quantum queries We prove Theorem 1.1 in two parts. First, in Section 3.1 we prove that with O(m it is possible to test whether a black-box distribution Pf (defined by some f : [n] → [m]) is close to uniform. We actually prove that this can be even done tolerantly in a sense, meaning that a d ...
Quantum spin systems from the perspective of quantum
... multiplied by an interaction-dependent factor (2 for Ising and 4 for Heisenberg) • To prevent the dimensions to blow up: variational dimensional reduction of PEPS – Given a PEPS |Di of dimension D, find the one |cD’i of dimension D’< D such that || |Di-|cD’i ||2 is minimized – This can again be do ...
... multiplied by an interaction-dependent factor (2 for Ising and 4 for Heisenberg) • To prevent the dimensions to blow up: variational dimensional reduction of PEPS – Given a PEPS |Di of dimension D, find the one |cD’i of dimension D’< D such that || |Di-|cD’i ||2 is minimized – This can again be do ...
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... system from figure 1. (a) Simplified atomic-level schematic diagram of the trapped rubidium atom quantum memory: A-to-B transition occurs when one photon from an entangled pair is absorbed; B-to-D transition is coherently driven to enable storage in the long-lived D levels; A-to-C cycling transition ...
... system from figure 1. (a) Simplified atomic-level schematic diagram of the trapped rubidium atom quantum memory: A-to-B transition occurs when one photon from an entangled pair is absorbed; B-to-D transition is coherently driven to enable storage in the long-lived D levels; A-to-C cycling transition ...
Giovannini, D., Romero, J., Leach, J., Dudley, A, Forbes, A, and
... c‘ ¼ 1. Defining MUBs in a general d-dimensional space is a difficult problem [14]; however, for a number of low-dimensional cases, it is possible to find complete sets of MUBs using simple procedures [33]. For these cases, which include the dimensions 2–5, the states fj‘ig can be chosen to be one o ...
... c‘ ¼ 1. Defining MUBs in a general d-dimensional space is a difficult problem [14]; however, for a number of low-dimensional cases, it is possible to find complete sets of MUBs using simple procedures [33]. For these cases, which include the dimensions 2–5, the states fj‘ig can be chosen to be one o ...
Quantum-Secure Coin-Flipping and Applications
... irreversible. Hence, in order to produce a classical output, the simulator had to (partially) measure the quantum system without copying it beforehand, but then it would become generally impossible to reconstruct all information necessary for correct rewinding. For these reasons, no simple and strai ...
... irreversible. Hence, in order to produce a classical output, the simulator had to (partially) measure the quantum system without copying it beforehand, but then it would become generally impossible to reconstruct all information necessary for correct rewinding. For these reasons, no simple and strai ...
Strong-Disorder Fixed Point in the Dissipative Random Transverse-Field Ising Model
... If h~2 is still the largest coupling in the chain the iteration (2) is repeated. Two situations may occur depending on the value of 2 . If 2 < 1 this procedure (2) will converge to a finite value h2 h2 ph2 =2 2 =12 and the SB system at site 2 is in a delocalized phase in which the spin ...
... If h~2 is still the largest coupling in the chain the iteration (2) is repeated. Two situations may occur depending on the value of 2 . If 2 < 1 this procedure (2) will converge to a finite value h2 h2 ph2 =2 2 =12 and the SB system at site 2 is in a delocalized phase in which the spin ...
Hydrogen atom
A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen constitutes about 75% of the elemental (baryonic) mass of the universe.In everyday life on Earth, isolated hydrogen atoms (usually called ""atomic hydrogen"" or, more precisely, ""monatomic hydrogen"") are extremely rare. Instead, hydrogen tends to combine with other atoms in compounds, or with itself to form ordinary (diatomic) hydrogen gas, H2. ""Atomic hydrogen"" and ""hydrogen atom"" in ordinary English use have overlapping, yet distinct, meanings. For example, a water molecule contains two hydrogen atoms, but does not contain atomic hydrogen (which would refer to isolated hydrogen atoms).