UNIDEF   23986
UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICO PARA LA DEFENSA
Unidad Ejecutora - UE
artículos
Título:
Manipulating transverse modes of photons for quantum cryptography
Autor/es:
MARCELO A. LUDA; MIGUEL ANTONIO LAROTONDA; JUAN PABLO PAZ; CHRISTIAN TOMÁS SCHMIEGELOW
Revista:
PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2014 p. 42325 - 42335
ISSN:
1050-2947
Resumen:
Several schemes have been proposed to extend quantum key distribution
protocols aimed at improving their security or at providing new physical
substrates for qubit implementation. We present a toolbox to jointly
create, manipulate, and measure qubits stored in polarization and
transverse-modes degrees of freedom of single photons. The toolbox
includes local operations on single qubits, controlled operations
between the two qubits, and projective measurements over a wide variety
of nonlocal bases in the four-dimensional space of states. We describe
how to implement the toolbox to perform an extended version of the BB84
protocol for this Hilbert space (ideally transmitting two key bits per
photon). We present the experimental implementation of the measurement
scheme both in the regimes of intense light beams and with single
photons. Thus, we show the feasibility of implementing the protocol,
providing an interesting example of a method for quantum information
processing using the polarization and transverse modes of light as
qubits.