MULTIPARTICLE ENTANGLEMENT Sebastian Hartweg, Mario Berta (QSIT Seminar, 10.12.2012)
... The operators in the left and right pairs of parentheses represent a common rotation by angle p2 of all N qubits, written in terms of the global angular momentum operators !composed P ! of the sum of the N individual spin-1/2 operators J ¼ N j¼1 Sj (Dicke operators). The operator in the middle pair ...
... The operators in the left and right pairs of parentheses represent a common rotation by angle p2 of all N qubits, written in terms of the global angular momentum operators !composed P ! of the sum of the N individual spin-1/2 operators J ¼ N j¼1 Sj (Dicke operators). The operator in the middle pair ...
Multiphoton population transfer in systems violating the classical twist condition: A... study of separatrix crossing in phase space
... describes a potential well with an approximately flat bottom so when the particle is at the bottom of the well, it has a very low frequency, just as it would just above the ionization threshold at U (x = 0) = 0. Having higher frequencies in between the bottom and the top of the well would mean that ...
... describes a potential well with an approximately flat bottom so when the particle is at the bottom of the well, it has a very low frequency, just as it would just above the ionization threshold at U (x = 0) = 0. Having higher frequencies in between the bottom and the top of the well would mean that ...
Studies in Quantum Information Theory
... and good times over many cups of coffee, bottles of beer, glasses of whiskey, and games of pool. In something of a virtual world, I wish also to acknowledge almost daily chat sessions with Gavin Mendel-Gleason and Praveen Sinha over IRC, spanning topics including politics, economics, religion, biolo ...
... and good times over many cups of coffee, bottles of beer, glasses of whiskey, and games of pool. In something of a virtual world, I wish also to acknowledge almost daily chat sessions with Gavin Mendel-Gleason and Praveen Sinha over IRC, spanning topics including politics, economics, religion, biolo ...
Dissipative Preparation of Spin Squeezed Atomic Ensembles in a Steady States
... produce short-lived spin-squeezed states, limited by decoherence processes. Moreover, using properly selected atomic transitions allows us to continuously pump the atoms into the desired states and consequently avoid population losses due to scattering into states not participating in the squeezing. ...
... produce short-lived spin-squeezed states, limited by decoherence processes. Moreover, using properly selected atomic transitions allows us to continuously pump the atoms into the desired states and consequently avoid population losses due to scattering into states not participating in the squeezing. ...
Quantum heating of a parametrically modulated oscillator: Spectral signatures M. Marthaler,
... In this paper we show that the distribution over the states of a modulated nonlinear oscillator can be measured spectroscopically. We find that, for small decay rate, the power spectrum of the oscillator and the spectrum of the response to an additional weak field can display a fine structure. The i ...
... In this paper we show that the distribution over the states of a modulated nonlinear oscillator can be measured spectroscopically. We find that, for small decay rate, the power spectrum of the oscillator and the spectrum of the response to an additional weak field can display a fine structure. The i ...
Planck`s radiation law, the light quantum, and the prehistory of
... implications of this discovery. Further more it is generally acknowledged that Planck was particularly reluctant to draw radical conclusions from the energy quantum ǫ and latter tried to bring his findings in conformity with established notions. However, if mentioned at all, this is presented as a de ...
... implications of this discovery. Further more it is generally acknowledged that Planck was particularly reluctant to draw radical conclusions from the energy quantum ǫ and latter tried to bring his findings in conformity with established notions. However, if mentioned at all, this is presented as a de ...
Physics of the Soul
... What is death? This seems easy to answer. Death is when life ends; it is the cessation of life. But do we know what life is? Do we know what its cessation means? Those questions are not so easy to answer, at least not in science. Most people are little interested in scientific definitions of life an ...
... What is death? This seems easy to answer. Death is when life ends; it is the cessation of life. But do we know what life is? Do we know what its cessation means? Those questions are not so easy to answer, at least not in science. Most people are little interested in scientific definitions of life an ...
Relativistic quantum information theory and quantum reference frames
... polarisation of a photon. Our starting point is the Dirac and Maxwell equations that describe respectively the one-particle states of localised massive fermions and photons. In the WKB limit we show how one can isolate a two-dimensional quantum state which evolves unitarily along Γ. The quantum stat ...
... polarisation of a photon. Our starting point is the Dirac and Maxwell equations that describe respectively the one-particle states of localised massive fermions and photons. In the WKB limit we show how one can isolate a two-dimensional quantum state which evolves unitarily along Γ. The quantum stat ...
Lower bounds for quantum communication complexity
... a function BP Cǫ (f ) is then defined analogously to the deterministic communication complexity, where worst case communication refers to both inputs and random bits. We set BP C(f ) = BP C1/3 (f ). In a weakly unbounded error protocol the output has to be correct with probability exceeding 1/2. If ...
... a function BP Cǫ (f ) is then defined analogously to the deterministic communication complexity, where worst case communication refers to both inputs and random bits. We set BP C(f ) = BP C1/3 (f ). In a weakly unbounded error protocol the output has to be correct with probability exceeding 1/2. If ...
