Dipole blockade without dipole-dipole interaction
- URL: http://arxiv.org/abs/2106.11268v1
- Date: Mon, 21 Jun 2021 17:12:55 GMT
- Title: Dipole blockade without dipole-dipole interaction
- Authors: Chengjie Zhu, Wei Li, Yaping Yang, Girish Agarwal
- Abstract summary: We propose a novel physical mechanism for realizing dipole blockade without the dipole-dipole interaction.
Two qubits coupled to a cavity are driven by a coherent field.
We show that these two qubits are strongly entangled over a broad regime of the system parameters.
- Score: 3.6245152174496416
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The dipole blockade phenomenon is a direct consequence of strong
dipole-dipole interaction, where only single atom can be excited because the
doubly excited state is shifted out of resonance. The corresponding two-body
entanglement with non-zero concurrence induced by the dipole blockade effect is
an important resource for quantum information processing. Here, we propose a
novel physical mechanism for realizing dipole blockade without the
dipole-dipole interaction, where two qubits coupled to a cavity, are driven by
a coherent field. By suitably chosen placements of the qubits in the cavity and
by adjusting the relative decay strengths of the qubits and cavity field, we
kill many unwanted excitation pathways. This leads to dipole blockade. In
addition, we show that these two qubits are strongly entangled over a broad
regime of the system parameters. We show that a strong signature of this dipole
blockade is the bunching property of the cavity photons which thus provides a
possible measurement of the dipole blockade. We present dynamical features of
the dipole blockade without dipole-dipole interaction. The proposal presented
in this work can be realized not only in traditional cavity QED, but also in
non-cavity topological photonics involving edge modes.
Related papers
- Quantum tunneling and its absence in deep wells and strong magnetic fields [0.0]
We construct a family of double well potentials containing examples for which the low-energy eigenvalue splitting vanishes.
By deforming within this family, the magnetic ground state can be made to transition from symmetric to anti-symmetric.
arXiv Detail & Related papers (2024-12-30T17:24:48Z) - Quantum optical scattering by macroscopic lossy objects: A general approach [55.2480439325792]
We develop a general approach to describe the scattering of quantum light by a lossy macroscopic object placed in vacuum.
We exploit the input-output relation to connect the output state of the field to the input one.
We analyze the impact of the classical transmission and absorption dyadics on the transitions from ingoing to outgoing s-polariton.
arXiv Detail & Related papers (2024-11-27T17:44:29Z) - Electrically tunable quantum correlations of dipolar polaritons with micrometer-scale blockade radii [1.2147217809224073]
An extreme yet reconfigurable nonlinear response to a single photon by a photonic system is crucial for realizing a universal two-photon gate.
Here we demonstrate electrically tunable partial photon blockade in dipolar waveguide polaritons on a semiconductor chip.
arXiv Detail & Related papers (2024-11-18T20:57:57Z) - Dense dipole-dipole-coupled two-level systems in a thermal bath [0.0]
We show the quantum nature of the spontaneously scattered light field in this process for weaker thermal baths.
The collectively emitted photon intensity suppresses or enhances depending on the environmental thermal baths intensities.
arXiv Detail & Related papers (2024-05-02T07:34:03Z) - Quantized Thouless pumps protected by interactions in dimerized Rydberg tweezer arrays [41.94295877935867]
In the noninteracting case, quantized Thouless pumps can only occur when a topological singularity is encircled adiabatically.
In the presence of interactions, such topological transport can even persist for exotic paths in which the system gets arbitrarily close to the noninteracting singularity.
arXiv Detail & Related papers (2024-02-14T16:58:21Z) - Unveiling the Quantum Toroidal Dipole in Nanosystems: Quantization,
Interaction Energy, and Measurement [44.99833362998488]
We investigate a quantum particle confined to a toroidal surface in the presence of a filiform current along the system's rotational axis.
Our analysis reveals that the interaction between the particle and the current induces a non-zero toroidal dipole in the particle's stationary states.
arXiv Detail & Related papers (2024-01-26T13:31:32Z) - Efficient decoupling of a non-linear qubit mode from its environment [0.9533143628888118]
We make use of the design flexibility of superconducting quantum circuits to form a multi-mode element with symmetry-protected modes.
The proposed circuit consists of three superconducting islands coupled to a central island via Josephson junctions.
We show that the coherence of the qubit is not limited by photon-induced dephasing when detuning the mediator mode from the readout resonator.
arXiv Detail & Related papers (2023-12-28T12:16:29Z) - Influence of direct dipole-dipole interactions on the optical response
of 2D materials in strongly inhomogeneous infrared cavity fields [0.0]
A two-dimensional (2D) material, formed for example by a self-assembled molecular monolayer or by a single layer of a van der Walls material, can couple efficiently with photonic nanocavities.
Here, we diagonalize the full Hamiltonian of the system, including these direct dipole-dipole interactions.
arXiv Detail & Related papers (2023-08-25T14:42:57Z) - Magnetic-field-induced cavity protection for intersubband polaritons [52.77024349608834]
We analyse the effect of a strong perpendicular magnetic field on an intersubband transition in a disordered doped quantum well strongly coupled to an optical cavity.
The magnetic field changes the lineshape of the intersubband optical transition due to the roughness of the interface of the quantum well from a Lorentzian to a Gaussian one.
arXiv Detail & Related papers (2022-10-14T18:00:03Z) - 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) - Parallel dark soliton pair in a bistable 2D exciton-polariton superfluid [47.187609203210705]
2D dark solitons are unstable and collapse into vortices due to snake instabilities.
We demonstrate that a pair of dark solitons can be formed in the wake of an obstacle in a polariton flow resonantly supported by a homogeneous laser beam.
arXiv Detail & Related papers (2020-03-25T13:52:22Z)
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.