19 papers · ranked by Valyu relevance
Evaldo M. F. Curado, Sofiane Faci, Jean-Pierre Gazeau, Diego Noguera + 1 more
'Vladimir Man’ko'] In quantum information processing, using a receiver device to differentiate between two non-orthogonal states leads to a quantum error probability. The minimum possible error is known as the Helstrom bound. In this work, we study the conditions for state discrimination using an alphabet of squeezed…
Jan Govaerts
This contribution to the present Workshop Proceedings outlines a general programme for identifying geometric structures—out of which to possibly recover quantum dynamics as well—associated to the manifold in Hilbert space of the quantum states that saturate the Schr¨odinger-Robertson uncertainty relation associated to…
Arkajit Mandal, Michael Taylor, Braden Weight, Eric Koessler + 2 more
When molecules are coupled to an optical cavity, new light-matter hybrid states, so-called polaritons, are formed due to quantum light-matter interactions. With the experimental demonstrations of modifying chemical reactivities by forming polaritons under strong light-matter interactions, theorists have been encouraged…
Kevin Zelaya, Véronique Hussin, Óscar Rosas-Ortiz
A new class of states of light is introduced that is complementary to the wellknown squeezed states. The construction is based on the general solution of the three-term recurrence relation that arises from the saturation of the Schr¨odinger inequality for the quadratures of a single-mode quantized electromagnetic…
Miguel Citeli de Freitas, Vitor Dantas Meireles, Viktor V. Dodonov
We consider the problem of minimization of products of mean values of the high powers of operators x and p. From this point of view, we study several two-term superpositions of the Fock states, as well as three popular families of infinite superpositions: squeezed states, even/odd coherent states, and orthogonal even…
Yue Li, Yi Li, Xu Cheng, Lingna Wang + 10 more
Generating multi-partite quantum entangled states amid dissipative environment is essential for advancing quantum simulation, metrology, and fundamental quantum research. Here, we use controlled dissipation as a resource and present an approach to generate programmable multimode entangled states in the vibrational…
Dmitry A. Kuts, Sergey A. Podoshvedov
We present a new method to entangle continuous variable (CV) states of certain parity and photonic states for the purpose of generating optical hybrid cluster (HC) states. To do it we introduce two families of the CV states of definite parity which stems from single mode squeezed vacuum (SMSV) state. Potential to apply…
Yanyan Cai, Xiaowei Deng, Libo Zhang, Zhongchu Ni + 7 more
Quantum squeezed states, with biased quantum noise, have been widely utilized in quantum sensing and quantum error correction applications. However, generating and manipulating these nonclassical states with a large squeezing degree typically requires strong nonlinearity, which inevitably induces additional decoherence…
Chaitanya Joshi, Elinor K. Irish, Timothy P. Spiller
Squeezed states of light are a set of nonclassical states in which the quantum fluctuations of one quadrature component are reduced below the standard quantum limit. With less noise than the best stabilised laser sources, squeezed light is a key resource in the field of quantum technologies and has already improved…
C V Sukumar
It is well known that the coherent states of the harmonic oscillator [1, 2] are eigenstates of the annihilation operator and that the gaussian squeezed states of the oscillator [3, 4] are eigenstates of particular linear combinations of the creation and annihilation operators. It has recently been shown that the phase…
S. Kannan, C. Sudheesh
We consider two kinds of superpositions of squeezed states of light. In the case of superpositions of first kind, the squeezing and all higher order squeezing vanishes. However, in the case of the second kind, it is possible to achieve a maximum amount of squeezing by adjusting the parameters in the superposition. The…
Šimon Bräuer, Tomáš Opatrný, Petr Marek
Quantum systems can be prepared in an infinite continuum of states, but only some of them can be used as resources for quantum technologies. Discerning whether a specific quantum state falls into this class, is often a challenging task. We show that it can be performed by looking at the squeezing of the quantum states…
Yusuf Turek, Wulayimu Maimaiti, Yutaka Shikano, Chang-Pu Sun + 1 more
'M. Al-Amri'] We investigate, within the weak measurement theory, the advantages of non-classical pointer states over semi-classical ones for coherent, squeezed vacuum, and Schröinger cat states. These states are utilized as pointer state for the system operator Aˆ with property Aˆ2 = Iˆ, where Iˆ represents the…
Michael Taylor, Arkajit Mandal, Pengfei Huo
Recent progress in enabling new chemical reactivities by strongly coupling molecular systems to quantized radiation has stimulated theoretical developments in molecular quantum electrodynamics As this field of cavity quantum electrodynamics (cQED) is highly interdisciplinary drawing from both quantum optics and…
Viktor Ahlberg Gagnér, Maja Jensen, Torbjörn Nur Olsson, Juan Cabello Sánchez + 15 more
Protein dynamics is shaped by interactions between thermal fluctuations, external forces, and molecular structures. Thermal fluctuations have high frequencies and are hence very challenging to quantify. We were able to record femtosecond X-ray diffraction snapshots and determine atomic displacements of crystalline…
Muir J. Morrison, Justin B. Kinney
Large complexes of classical particles play central roles in biology, in polymer physics, and in other disciplines. However, physics currently lacks mathematical methods for describing such complexes in terms of component particles, interaction energies, and assembly rules. Here we describe a Fock space structure that…
Authors not listed
Coupling molecules to the quantized radiation field inside an optical cavity creates a set of new photon-matter hybrid states, so-called polaritons. Recent experiments have demonstrated that molecular polaritons could lead to modifications of excited-state dynamics and spectroscopy, photochemistry, and ground-state…
Authors not listed
Molecular polaritons are hybrid states formed by the quantum mechanical interaction between light and matter. Recent experiments have shown the ability to drastically modify chemical reactions in both the ground and excited states through the hybridization of the electronic and photonic degrees of freedom. Ab initio…
Arkajit Mandal, Michael Taylor, Pengfei Huo
We provide a simple and intuitive theory to explain how coupling a molecule to an optical cavity can modify ground-state chemical reactivity by exploiting intrinsic quantum behaviors of light-matter interactions. Using the recently developed Polarized Fock States representation, we demonstrate that the change of the…