Fractional Quantum Zeno Effect Emerging from Non-Hermitian Physics
- URL: http://arxiv.org/abs/2207.03459v2
- Date: Thu, 10 Aug 2023 14:48:37 GMT
- Title: Fractional Quantum Zeno Effect Emerging from Non-Hermitian Physics
- Authors: Yue Sun, Tao Shi, Zhiyong Liu, Zhidong Zhang, Liantuan Xiao, Suotang
Jia, Ying Hu
- Abstract summary: We predict quantum non-Hermitian phenomena: the fractional quantum Zeno (FQZ) effect and FQZ-induced photon antibunching.
We find FQZ-induced strong photon antibunching in the steady state of a driven emitter even for weak nonlinearities.
Remarkably, we identify that the sub-Poissonian quantum statistics of photons, which has no classical analogs, stems here from the key role of non-Hermiticity.
- Score: 12.706932285002544
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Exploring non-Hermitian phenomenology is an exciting frontier of modern
physics. However, the demonstration of a non-Hermitian phenomenon that is
quantum in nature has remained elusive. Here, we predict quantum non-Hermitian
phenomena: the fractional quantum Zeno (FQZ) effect and FQZ-induced photon
antibunching. We consider a quantum optics platform with reservoir engineering,
where nonlinear emitters are coupled to a bath of decaying bosonic modes whose
own decay rates form band structures. By engineering the dissipation band, the
spontaneous emission of emitters can be suppressed by strong dissipation
through an algebraic scaling with fractional exponents - the FQZ effect. This
fractional scaling originates uniquely from the divergent dissipative density
of states near the dissipation band edge, different from the traditional
closed-bath context. We find FQZ-induced strong photon antibunching in the
steady state of a driven emitter even for weak nonlinearities. Remarkably, we
identify that the sub-Poissonian quantum statistics of photons, which has no
classical analogs, stems here from the key role of non-Hermiticity. Our setup
is experimentally feasible with the techniques used to design lattice models
with dissipative couplings.
Related papers
- Realization of fractional quantum Hall state with interacting photons [7.469716894645766]
Bottom-up approach on an engineered quantum platform will provide opportunities to operate FQH states without external magnetic field.
We demonstrate a lattice version of photon FQH state using a programmable on-chip platform based on photon blockade and engineering gauge fields.
arXiv Detail & Related papers (2024-01-30T13:55:41Z) - Probing the symmetry breaking of a light--matter system by an ancillary
qubit [50.591267188664666]
Hybrid quantum systems in the ultrastrong, and even more in the deep-strong, coupling regimes can exhibit exotic physical phenomena.
We experimentally observe the parity symmetry breaking of an ancillary Xmon artificial atom induced by the field of a lumped-element superconducting resonator.
This result opens a way to experimentally explore the novel quantum-vacuum effects emerging in the deep-strong coupling regime.
arXiv Detail & Related papers (2022-09-13T06:14:08Z) - Unification of Random Dynamical Decoupling and the Quantum Zeno Effect [68.8204255655161]
We show that the system dynamics under random dynamical decoupling converges to a unitary with a decoupling error that characteristically depends on the convergence speed of the Zeno limit.
This reveals a unification of the random dynamical decoupling and the quantum Zeno effect.
arXiv Detail & Related papers (2021-12-08T11:41:38Z) - Exotic interactions mediated by a non-Hermitian photonic bath [0.0]
We study the exotic interaction between emitters mediated by the photonic modes of a lossy photonic lattice.
We show in a paradigmatic case study that structured losses in the field can seed exotic emission properties.
These findings introduce a new paradigm of light-mediated interactions with unprecedented features.
arXiv Detail & Related papers (2021-09-27T18:00:01Z) - Enhanced nonlinear quantum metrology with weakly coupled solitons and
particle losses [58.720142291102135]
We offer an interferometric procedure for phase parameters estimation at the Heisenberg (up to 1/N) and super-Heisenberg scaling levels.
The heart of our setup is the novel soliton Josephson Junction (SJJ) system providing the formation of the quantum probe.
We illustrate that such states are close to the optimal ones even with moderate losses.
arXiv Detail & Related papers (2021-08-07T09:29:23Z) - Observation-dependent suppression and enhancement of two-photon
coincidences by tailored losses [68.8204255655161]
Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter.
In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement.
Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
arXiv Detail & Related papers (2021-05-12T06:47:35Z) - Non-equilibrium stationary states of quantum non-Hermitian lattice
models [68.8204255655161]
We show how generic non-Hermitian tight-binding lattice models can be realized in an unconditional, quantum-mechanically consistent manner.
We focus on the quantum steady states of such models for both fermionic and bosonic systems.
arXiv Detail & Related papers (2021-03-02T18:56:44Z) - Dynamical Mean-Field Theory for Markovian Open Quantum Many-Body Systems [0.0]
We extend the nonequilibrium bosonic Dynamical Mean Field Theory to Markovian open quantum systems.
As a first application, we address the steady-state of a driven-dissipative Bose-Hubbard model with two-body losses and incoherent pump.
arXiv Detail & Related papers (2020-08-06T10:35:26Z) - Critical Theory for the Breakdown of Photon Blockade [0.0]
Photon blockade is the result of the interplay between the quantized nature of light and strong optical nonlinearities.
We theoretically study a single atom coupled to the light field.
We show that this transition is associated to the spontaneous breaking of an anti-unitary PT-symmetry.
arXiv Detail & Related papers (2020-06-10T01:09:21Z) - Theory of waveguide-QED with moving emitters [68.8204255655161]
We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace.
We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
arXiv Detail & Related papers (2020-03-20T12:14:10Z) - Ramsey interferometry of non-Hermitian quantum impurities [0.0]
We propose a protocol to measure via interferometry a generalised Loschmidt echo of a generic state evolving in time with the non-Hermitian Hamiltonian itself.
For strong dissipation we uncover the phenomenology of a quantum many-body Zeno effect.
arXiv Detail & Related papers (2020-03-16T18:00:36Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.