Cooling and control of a cavity opto-electromechanical system (2009)
Lee, Kwan H., McRae, Terry G., Harris, Glen I., Knittel, Joachim, Bowen, Warwick P.
We implement a cavity opto-electromechanical system with the mechanical control capabilities of nanoelectromechanical devices, and 100 times superior mechanical transduction sensitivity achieved via...
Quantum limited particle sensing in optical tweezers (2009)
Tay, Jian Wei, Hsu, Magnus T. L., Bowen, Warwick P.
Particle sensing in optical tweezers systems provides information on the position, velocity and force of the specimen particles. The conventional quadrant detection scheme is applied ubiquitously in...
Asynchronous entanglement from coherently coupled nonlinear cavities (2009)
McRae, Terry G., Bowen, Warwick P.
The output fields of a pair of coherently coupled nonlinear optical cavities are found to exhibit strong optical entanglement. For sufficiently strong coupling the quantum correlations become...
An analytical semiclassical model is presented of the interaction between a single atom and the two degenerate counter-propagating electromagnetic field modes in a microtoroidal resonator. The model...
An analytical semiclassical model is presented of the interaction between a single atom and the two degenerate counter-propagating electromagnetic field modes in a microtoroidal resonator. The model...
Harmonic entanglement with second-order nonlinearity (2006)
Grosse, Nicolai B., Bowen, Warwick P., McKenzie, Kirk, Lam, Ping Koy
We investigate the second-order nonlinear interaction as a means to generate entanglement between fields of differing wavelengths and show that perfect entanglement can, in principle, be produced...
A quantum study of multi-bit phase coding for optical storage (2006)
Hsu, Magnus T. L., Delaubert, Vincent, Bowen, Warwick P., Fabre, Claude, Bachor, Hans-A., Lam, Ping Koy
We propose a scheme which encodes information in both the longitudinal and spatial transverse phases of a continuous-wave optical beam. A split detector-based interferometric scheme is then...
Continuous-Variable Spatial Entanglement for Bright Optical Beams (2005)
Hsu, Magnus T. L., Bowen, Warwick P., Treps, Nicolas, Lam, Ping Koy
A light beam is said to be position squeezed if its position can be determined to an accuracy beyond the standard quantum limit. We identify the position and momentum observables for bright optical...
Coherent State Quantum Key Distribution Without Random Basis Switching (2005)
Weedbrook, Christian, Lance, Andrew M., Bowen, Warwick P., Symul, Thomas, Ralph, Timothy C., Lam, Ping Koy
The random switching of measurement bases is commonly assumed to be a necessary step of quantum key distribution protocols. In this paper we show that switching is not required for coherent state...
Harmonic entanglement with second-order non-linearity (2005)
Grosse, Nicolai B., Bowen, Warwick P., McKenzie, Kirk, Lam, Ping Koy
We investigate the second-order non-linear interaction as a means to generate entanglement between fields of differing wavelengths. And show that perfect entanglement can, in principle, be produced...
Continuous-Variable Spatial Entanglement for Bright Optical Beams (2005)
Hsu, Magnus T. L., Bowen, Warwick P., Treps, Nicolas, Lam, Ping Koy
A light beam is said to be position squeezed if its position can be determined to an accuracy beyond the standard quantum limit. We identify the position and momentum observables for bright optical...
Continuous-Variable Spatial Entanglement for Bright Optical Beams (2005)
Hsu, Magnus T. L., Bowen, Warwick P., Treps, Nicolas, Lam, Ping Koy
A light beam is said to be position squeezed if its position can be determined to an accuracy beyond the standard quantum limit. We identify the position and momentum observables for bright optical...
Continuous-Variable Spatial Entanglement for Bright Optical Beams (2005)
Hsu, Magnus T. L., Bowen, Warwick P., Treps, Nicolas, Lam, Ping Koy
A light beam is said to be position squeezed if its position can be determined to an accuracy beyond the standard quantum limit. We identify the position and momentum observables for bright optical...
Continuous Variable Quantum State Sharing via Quantum Disentanglement (2004)
Lance, Andrew M., Symul, Thomas, Bowen, Warwick P., Sanders, Barry C., Tyc, Tomas, Ralph, Timothy C., ...
Quantum state sharing is a protocol where perfect reconstruction of quantum states is achieved with incomplete or partial information in a multi-partite quantum networks. Quantum state sharing allows...
Quantum Cryptography without Switching (2004)
Weedbrook, Christian, Lance, Andrew M., Bowen, Warwick P., Symul, Thomas, Ralph, Timothy C., Lam, Ping Koy
We propose a new coherent state quantum key distribution protocol that eliminates the need to randomly switch between measurement bases. This protocol provides significantly higher secret key rates...
Squeezed light at sideband frequencies below 100 kHz from a single OPA (2004)
Schnabel, Roman, Vahlbruch, Henning, Franzen, Alexander, Chelkowski, Simon, Grosse, Nicolai B., Bachor, Hans-A., ...
Quantum noise of the electromagnetic field is one of the limiting noise sources in interferometric gravitational wave detectors. Shifting the spectrum of squeezed vacuum states downwards into the...
Tripartite Quantum State Sharing (2004)
Lance, Andrew M., Symul, Thomas, Bowen, Warwick P., Sanders, Barry C., Lam, Ping Koy
We demonstrate a multipartite protocol to securely distribute and reconstruct a quantum state. A secret quantum state is encoded into a tripartite entangled state and distributed to three players. By...
Tripartite Quantum State Sharing (2004)
Lance, Andrew M., Symul, Thomas, Bowen, Warwick P., Sanders, Barry C., Lam, Ping Koy
We demonstrate a multipartite protocol to securely distribute and reconstruct a quantum state. A secret quantum state is encoded into a tripartite entangled state and distributed to three players. By...
Tripartite Quantum State Sharing (2003)
Lance, Andrew M., Symul, Thomas, Bowen, Warwick P., Sanders, Barry C., Lam, Ping Koy
We demonstrate a multipartite protocol to securely distribute and reconstruct a quantum state. A secret quantum state is encoded into a tripartite entangled state and distributed to three players....
Continuous variable polarization entanglement, experiment and analysis (2003)
Bowen, Warwick P., Treps, Nicolas, Schnabel, Roman, Ralph, Timothy C., Lam, Ping Koy
We generate and characterise continuous variable polarization entanglement between two optical beams. We first produce quadrature entanglement, and by performing local operations we transform it into...
Stokes-operator-squeezed continuous-variable polarization states (2003)
Schnabel,Roman, Bowen,Warwick P., Treps,Nicolas, Ralph,Timothy C., Bachor,Hans-A., Lam,Ping Koy
We investigate nonclassical Stokes-operator variances in continuous-wave polarization-squeezed laser light generated from one and two optical parametric amplifiers. A general expression of how...
Optical experiments beyond the quantum limit: squeezing, entanglement and teleportation (2003)
Schnabel,Roman, Bowen,Warwick P., Treps,Nicolas, Ralph,Timothy C., Bachor,Hans-A., Lam,Ping Koy, ...
Stokes-operator-squeezed continuous-variable polarization states (2003)
Schnabel, Roman, Bowen, Warwick P., Treps, Nicolas, Ralph, Timothy C., Bachor, Hans-A., Lam, Ping Koy
We investigate nonclassical Stokes-operator variances in continuous-wave polarization-squeezed laser light generated from one and two optical parametric amplifiers. A general expression of how...
Optical experiments beyond the quantum limit: squeezing, entanglement and teleportation (2003)
Schnabel, Roman, Bowen, Warwick P., Treps, Nicolas, Ralph, Timothy C., Bachor, Hans-A., Lam, Ping Koy, ...
Continuous variable (2,3) threshold quantum secret sharing schemes (2003)
Lance, Andrew M., Symul, Thomas, Bowen, Warwick P., Tyc, Tomas, Sanders, Barry C., Lam, Ping Koy
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...
Continuous variable (2,3) threshold quantum secret sharing schemes (2003)
Lance, Andrew M., Symul, Thomas, Bowen, Warwick P., Tyc, Tomas, Sanders, Barry C., Lam, Ping Koy
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...
Continuous variable (2,3) threshold quantum secret sharing schemes (2003)
Lance, Andrew M, Symul, Thomas, Bowen, Warwick P, Tyc, Tomás, Sanders, Barry C, Lam, Ping Koy
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...
Stokes operator squeezed continuous variable polarization states (2002)
Schnabel, Roman, Bowen, Warwick P., Treps, Nicolas, Ralph, Timothy C., Bachor, Hans-A., Lam, Ping Koy
We investigate quantum correlations in continuous wave polarization squeezed laser light generated from one and two optical parametric amplifiers, respectively. A general expression of how Stokes...
Experimental investigation of continuous variable quantum teleportation (2002)
Bowen, Warwick P., Treps, Nicolas, Buchler, Ben C., Schnabel, Roman, Ralph, Timothy C., Bachor, Hans -A., ...
We report the experimental demonstration of quantum teleportation of the quadrature amplitudes of a light field. Our experiment was stably locked for long periods, and was analyzed in terms of...
Experimental demonstration of continuous variable polarization entanglement (2002)
Bowen, Warwick P., Treps, Nicolas, Schnabel, Roman, Lam, Ping Koy
We report the experimental transformation of quadrature entanglement between two optical beams into continuous variable polarization entanglement. We extend the inseparability criterion proposed by...
Polarization Squeezing of Continuous Variable Stokes Parameters (2001)
Bowen, Warwick P., Schnabel, Roman, Bachor, Hans -A., Lam, Ping Koy
We report the first direct experimental characterization of continuous variable quantum Stokes parameters. We generate a continuous wave light beam with more than 3 dB of simultaneous squeezing in...