Macquarie University, Sydney Macquarie University ResearchOnline

Showing items 1 - 15 of 36.

Add to Quick Collection   All 36 Results

Sort:
 Add All Items to Quick Collection
Date: 2008
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/45090
Description: We present a detailed analysis of decoherence free subspaces and develop a rigorous theory that provides necessary and sufficient conditions for dynamically stable decoherence free subspaces. This all ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2008
Subject Keyword: 020600 Quantum Physics
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/102731
Description: We analyze the stability of super- and subradiant states in a system of identical two-level atoms in the near-Dicke limit, i.e., when the atoms are very close to each other compared to the wavelength ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2008
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/45132
Description: Quantum computation is a fast-growing, multi-disciplinary research field. The purpose of a quantum computer is to execute quantum algorithms that efficiently solve computational problems intractable w ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2006
Language: eng
Resource Type: conference paper
Identifier: http://hdl.handle.net/1959.14/8680
Description: A high gain antenna made from dual 1-D electromagnetic bandgap (EBG) resonators is described. The combination of dual resonators with an array feed achieves a wide radiation bandwidth, thereby address ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2006
Subject Keyword: photon counting | nonlinear optics
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/39690
Description: We use photon counters to obtain the joint photon-counting statistics from twin-beam nondegenerate parametric down-conversion, and we demonstrate directly, and with no auxiliary assumptions, that thes ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2006
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/14251
Description: We show how to convert between partially coherent superpositions of a single photon with the vacuum by using linear optics and postselection based on homodyne measurements. We introduce a generalized ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2006
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/39670
Description: We propose a scheme to generate double electromagnetically induced transparency and optimal cross-phase modulation for two slow, copropagating pulses with matched group velocities in a single species ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2006
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/8669
Description: A technique is described for creating linear array antennas that conform to the natural stacking sequence of the woodpile electromagnetic bandgap (EBG) material. Each element in the linear array consi ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2006
Subject Keyword: teleportation | quantum entanglement
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/39680
Description: We analyze quantum teleportation for composite systems, specifically for concatenated teleporation (decomposing a large composite state into smaller states of dimension commensurate with the channel) ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/27218
Description: We show how to determine the maximum and minimum possible values of one measure of entropy for a given value of another measure of entropy. These maximum and minimum values are obtained for two standa ... More
Reviewed: Reviewed
Date: 2003
Subject Keyword: 020000 Physical Sciences
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/39765
Description: We present two schemes to perform continuous variable (2, 3) threshold quantum secret sharing (QSS) on the quadrature amplitudes of bright light beams. Both schemes require a pair of entangled light b ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/29362
Description: We propose an efficient scheme for sharing a continuous-variable quantum secret using passive optical interferometry and squeezers: this efficiency is achieved by showing that a maximum of two squeeze ... More
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/39973
Description: We determine the entanglement capability of a self-inverse Hamiltonian evolution, which reduces to the known result for the Ising Hamiltonian, and identify optimal input states for yielding the maxima ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/39624
Description: We introduce the entanglement gauge describing the combined effects of local operations and nonlocal unitary transformations on bipartite quantum systems. The entanglement gauge exploits the invarianc ... More
Full Text: Full Text
Reviewed: Reviewed
Date: 2003
Language: eng
Resource Type: journal article
Identifier: http://hdl.handle.net/1959.14/39656
Description: We establish the entangling power of a unitary operator on a general finite-dimensional bipartite quantum system with and without ancillas, and give relations between the entangling power based on the ... More
Full Text: Full Text
Reviewed: Reviewed