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http://xxx.lanl.gov/abs/quant-ph/0104033

David Deutsch <david.deutsch@qubit.org>

The "Multiverse"

The structure of the multiverse is determined by information flow.

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http://xxx.lanl.gov/abs/quant-ph/0104006

Jan Sladkowski <sladk@server.phys.us.edu.pl>

"Quantum Market Games"

We propose a quantum-like description of markets and economics. The approach

has roots in the recently developed quantum game theory.

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http://xxx.lanl.gov/abs/quant-ph/0104078

M. Ruzzi, D. Galetti

"Quantum Clock"

In this work we will advance farther along a line previously developed

concerning our proposal of a time interval operator, on finite dimensional

spaces. The time interval operator is Hermitian, and its eigenvalues are

time values with a precise and interesting role on the dynamics. With the

help of the Discrete Phase Space Formalism (DPSF) previously developed, we

show that the time interval operator is the complementary pair of the

Hamiltonian. From that, a simple system is proposed as a quantum clock. The

only restriction is that our results do not apply to all possible

Hamiltonians.

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http://xxx.lanl.gov/abs/quant-ph/0104080

Gavriel Segre <gavriel.segre@pv.infn.it>

"Quantum Casinos"

We introduce and analyze a quantum analogue of the Law of Excluded Gambling

Strategies of Classical Decision Theory by the definition of different kind

of quantum casinos. The necessity of keeping into account entaglement (by

the way we give a staightforward generalization of Schmidt's entanglement

measure) forces us to adopt the general algebraic language of Quantum

Probability Theory whose essential points are reviewed. The Mathematica code

of two packages simulating, respectively, classical and quantum gambling is

included. The deep link existing between the censorship of winning quantum

gambling strategies and the central notion of Quantum Algorithmic

Information Theory, namely quantum algorithmic randomness (by the way we

introduce and discard the naive noncommutative generalization of the

original Kolmogorov definition), is analyzed.

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http://xxx.lanl.gov/abs/quant-ph/0102046

Todd Brun <tbrun@ias.edu>

"A Quantum Web Page"

In quantum teleportation, an unknown quantum state is transmitted from one

party to another using only local operations and classical communication, at

the cost of shared entanglement. Is possible similarly, using an N party

entangled state, to have the state retrievable by any of the N-1 possible

receivers? If the receivers cooperate, and share a suitable state, this can

be done reliably. The N party GHZ is one such state; I derive a large class

of such states, and show that they are in general not equivalent to the GHZ.

I also briefly discuss the problem where the parties do not cooperate, and

the relationship of this problem to the problem of multipartite entanglement

quantification.

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http://www.actionlove.com/cases/case8317.htm

"Quantum Orgasm" (?)

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