Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Geremia, JM"'
Publikováno v:
Phys. Rev. A 81, 032104 (2010)
It has become common practice to model large spin ensembles as an effective pseudospin with total angular momentum J = N x j, where j is the spin per particle. Such approaches (at least implicitly) restrict the quantum state of the ensemble to the so
Externí odkaz:
http://arxiv.org/abs/0910.3897
It is generally believed that dispersive polarimetric detection of collective angular momentum in large atomic spin systems gives rise to: squeezing in the measured observable, anti-squeezing in a conjugate observable, and collective spin eigenstates
Externí odkaz:
http://arxiv.org/abs/0910.3895
Autor:
Chase, Bradley A., Geremia, JM
We consider the effective dynamics obtained by double-passing a far-detuned laser probe through a large atomic spin system. The net result of the atom-field interaction is a type of coherent positive feedback that amplifies the values of selected spi
Externí odkaz:
http://arxiv.org/abs/0905.0931
Publikováno v:
Phys. Rev. A, 79, 062107 (2009)
We argue that it is possible in principle to reduce the uncertainty of an atomic magnetometer by double-passing a far-detuned laser field through the atomic sample as it undergoes Larmor precession. Numerical simulations of the quantum Fisher informa
Externí odkaz:
http://arxiv.org/abs/0903.2050
Autor:
Chase, Bradley A., Partner, Heather L., Black, Brigette D., Baragiola, Benjamin Q., Cook, Robert L., Geremia, JM
We provide evidence, based on direct simulation of the quantum Fisher information, that 1/N scaling of the sensitivity with the number of atoms N in an atomic magnetometer can be surpassed by double-passing a far-detuned laser through the atomic syst
Externí odkaz:
http://arxiv.org/abs/0708.2730
Publikováno v:
Phys. Rev. Lett. 98, 090401 (2007)
We develop generalized bounds for quantum single-parameter estimation problems for which the coupling to the parameter is described by intrinsic multi-system interactions. For a Hamiltonian with $k$-system parameter-sensitive terms, the quantum limit
Externí odkaz:
http://arxiv.org/abs/quant-ph/0609179
Autor:
Geremia, JM
We present a deterministic approach based on continuous measurement and real-time quantum feedback control to prepare arbitrary photon number states of a cavity mode. The procedure passively monitors the number state actually achieved in each feedbac
Externí odkaz:
http://arxiv.org/abs/quant-ph/0603219
Optimally extracting information from measurements performed on a physical system requires an accurate model of the measurement interaction. Continuously probing the collective spin of an Alkali atom cloud via its interaction with an off-resonant opt
Externí odkaz:
http://arxiv.org/abs/quant-ph/0501033
Autor:
Geremia, JM
Several proposed techniques for distinguishing between optical coherent states are analyzed under a physically realistic model of photodetection. Quantum error probabilities are derived for the Kennedy receiver, the Dolinar receiver and the unitary r
Externí odkaz:
http://arxiv.org/abs/quant-ph/0407205
Autor:
Geremia, JM, Rabitz, Herschel A.
Optimal Identification (OI) is a recently developed procedure for extracting optimal information about quantum Hamiltonians from experimental data using shaped control fields to drive the system in such a manner that dynamical measurements provide ma
Externí odkaz:
http://arxiv.org/abs/quant-ph/0312212