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Heat bath models are of topical interest especially in areas such as quantum information and nanophysics. Thus, it is important to develop realistic calculations that can be used to make contact with experiments. Here, we wish to examine the effects of a heat bath on various thermodynamic functions such as entropy, partition function, average energy,… (More)

We present an exact analysis of an oscillator (the detector) moving under a constant force with respect to zero-temperature vacuum and coupled to a one-dimensional scalar field. We show that this system does not radiate despite the fact that it thermalizes at the Unruh temperature. We remark upon a differing opinion expressed regarding a system coupled to… (More)

- Paul Hahn, Justin Migacz, Rachelle O’Connell, Joseph A. Izatt, Cynthia A. Toth
- Graefe's Archive for Clinical and Experimental…
- 2012

We have recently developed a microscope-integrated spectral-domain optical coherence tomography (MIOCT) device towards intrasurgical cross-sectional imaging of surgical maneuvers. In this report, we explore the capability of MIOCT to acquire real-time video imaging of vitreoretinal surgical maneuvers without post-processing modifications. Standard 3-port… (More)

The free energy of a quantum oscillator in an arbitrary heat bath at temperature T is given by a ‘‘remarkable formula’’ which involves only a single integral. This leads to a corresponding simple result for the entropy. The lowtemperature limit is examined in detail and explicit results are obtained both for the case of an Ohmic heat bath and a radiation… (More)

- R. F. O’Connell
- 2006

The first in a long series of papers by John T. Lewis, in collaboration with G. W. Ford and the present author, considered the problem of the most general coupling of a quantum particle to a linear passive heat bath, in the course of which they derived an exact formula for the free energy of an oscillator coupled to a heat bath in thermal equilibrium at… (More)

- R. F. O’Connell
- 2007

The discovery that the expansion of the universe is accelerating in time is a major discovery which still awaits adequate explanation. It is generally agreed that this implies a cosmic repulsion as a result of the existence of a cosmological constant ∧> 0. However, estimates of ∧, based on calculations of the zero-point fluctuations of quantum fields are… (More)

The quantum analog of the joint probability distributions describing a classical stochastic process is introduced. A prescription is given for constructing the quantum distribution associated with a sequence of measurements. For the case of quantum Brownian motion this prescription is illustrated with a number of explicit examples. In particular, it is… (More)

- R. F. O’Connell
- 2003

We first review the usefulness of the Wigner distribution functions (WDF), associated with Lindblad and pre-master equations, for analyzing a host of problems in Quantum Optics where dissipation plays a major role, an arena where weak coupling and long-time approximations are valid. However, we also show their limitations for the discussion of decoherence,… (More)

A localized free particle is represented by a wave packet and its motion is discussed in most quantum mechanics textbooks. Implicit in these discussions is the assumption of zero temperature. We discuss how the effects of finite temperature and squeezing can be incorporated in an elementary manner. The results show how the introduction of simple tools and… (More)

- R. F. O’Connell
- 2008

— We survey theoretical and experimental/observational results on general-relativistic spin (rotation) effects in binary systems. A detailed discussion is given of the two-body Kepler problem and its first post-Newtonian generalization, including spin effects. Spin effects result from gravitational spin-orbit and spin-spin interactions (analogous to the… (More)