B. Baseia

GENERATION OF THE RECIPROCAL-BINOMIAL STATE

Abstract We present an experimentally feasible scheme to generate in a cavity the recently suggested reciprocal-binomial state of the radiation field. For a running wave, this state would play the role of a reference field for measuring the quantum optical phase probability distribution by projection synthesis as proposed by Barnett and Pegg [Phys. Rev. Lett. 76 (1996) 4148]. The same scheme can also be used to generate the binomial and the negative binomial states.

Intermediate number-phase states of the quantized radiation field

Abstract We introduce intermediate number-phase states of the quantized radiation field. It reduces to the number state and to the phase state in different limits. It is shown that this state exhibits nonclassical effects in the light field such as antibunching, sub-Poissonian statistics and squeezing, for certain ranges of the involved parameters.

Q-function measurement by projection synthesis☆

Abstract Following a recent proposal by Barnett and Pegg [Phys. Rev. Lett. 76 (1996) 41 48] we present an extension of the projection synthesis method for the Q -function measurement. We also show that a convenient choice of a reference state allows us to measure dispersions of quadrature operators.

INTERMEDIATE NUMBER-SQUEEZED STATE OF THE QUANTIZED RADIATION FIELD

Following previous strategies by Stoler et al. which introduced the binomial state and Baseia et al. which introduced the intermediate number phase state, we introduce a new intermediate state of the quantized radiation field, which reduces to the number state and squeezed state in two different limits. This interpolating state exhibits nonclassical effects as sub-Poissonian, antibunching and squeezing, obtained from the corresponding expressions as function of the interpolating parameters.

On a new intermediate state of the quantized radiation field

Abstract In a recent paper we introduced the intermediate number-phase state (INPS) of the quantized radiation field, which interpolates between the number state |n> and the phase state |θ >. Various non-classical properties of the light field in this state (sub-Poissonian statistics, antibunching and squeezing effects) were investigated. Here, looking for a criterion characterizing the INPS as a “good” interpolating state, we investigate the influence of the interpolating parameters upon the variances and uncertainty relation involving the number and phase operators in this state.

ON THE GENERATION OF INTERMEDIATE NUMBER SQUEEZED STATE OF THE QUANTIZED RADIATION FIELD

Recently, a new state of the quantized radiation field — the intermediate number squeezed state (INSS) — has been introduced in the literature: it interpolates between the number state |n> and the squeezed state |z, α>=Ŝ(z)|α>, and exhibits interesting nonclassical properties as antibunching, sub-Poissonian statistics and squeezing. Here we introduce a slight modification in the previous definition allowing us a proposal to generate the INSS. Nonclassical properties using a new set of parameters are also studied.

Probing a quantum state via electronic deflection

Abstract We extend recent investigations, where a quantum state of the radiation field is probed via atomic deflection, to the case of electronic deflection. Setting a convenient configuration of field and prescriptions on the electron beam one finds an analogy between the atom and electron deflection experiments. Similarities and differences of strategy and results are discussed.

Unified approach to superposition states of the quantized radiation field

SummaryIn the recent years various and interesting superposition states of the quantized radiation field were investigated in the literature, such as that involving two number states by Wodkiewicz et al.; that involving two coherent states by Hillery and Gerry et al.; that involving two squeezed states by Xin et al., etc. Here we study a general one-parameter superposition state which unifies those states and others in the literature, all becoming a particularization of ours. General expressions characterizing the physical properties of the field are obtained. The role played by the present superposition state as an alternative interpolating state is also discussed.

NONLOCALITY OF A SINGLE PARTICLE : FROM THE FOCK SPACE TO CAVITY QED

Abstract We have transposed Peres argument [Phys. Rev. Lett. 74 (1995) 4571] about the single-particle nonlocality from the Fock space into an experimentally feasible scheme in cavity QED. The present scheme consists of a new proposal to demonstrate the single-particle nonlocality, where the single-particle state is constructed with a coherent factor which is crucial to reveal its nonlocal character.

Even and odd coherent states are “shadowed-like” states

Abstract Shadowed states were introduced recently in the literature. It was shown that these states always exhibit nonclassical effects [R. Srinivasan and C.T. Lee, Phys. Lett. A 218 (1996) 151]. Here we show that the well known even and odd coherent states are shadowed-like states, whose differences and similarities are discussed.