Engineering spin squeezing in a 3D optical lattice with interacting spin-orbit-coupled fermions

One of the most important tasks in modern quantum science is to coherently control and entangle many-body systems, and to subsequently use these systems to realize powerful quantum technologies such as quantum-enhanced sensors. However, many-body entangled states are difficult to prepare and preserve since internal dynamics and external noise rapidly degrade any useful entanglement. Here, we introduce a protocol that counterintuitively exploits inhomogeneities, a typical source of dephasing in a many-body system, in combination with interactions to generate metrologically useful and robust many-body entangled states. Motivated by current limitations in state-of-the-art three-dimensional (3D) optical lattice clocks (OLCs) operating at quantum degeneracy, we use local interactions in a Hubbard model with spin-orbit coupling to achieve a spin-locking effect. In addition to prolonging inter-particle spin coherence, spin-locking transforms the dephasing effect of spin-orbit coupling into a collective spin-squeezing process that can be further enhanced by applying a modulated drive. Our protocol is fully compatible with state-of-the-art 3D OLC interrogation schemes and may be used to improve their sensitivity, which is currently limited by the intrinsic quantum noise of independent atoms. We demonstrate that even with realistic experimental imperfections, our protocol may generate $\sim10$--$14$ dB of spin squeezing in $\sim1$ second with $\sim10^2$--$10^4$ atoms. This capability allows OLCs to enter a new era of quantum enhanced sensing using correlated quantum states of driven non-equilibrium systems.Comment: 20 pages, 12 figure

The ADA & Persons with Mental Disabilities: Can Sanist Attitudes Be Undone?

Former employee of Postal Service disabled by severe depression sued Postmaster General under Rehabilitation Act, alleging workplace harassment due to his disability, and retaliation

Your Old Road Is/ Rapidly Agin\u27 : International Human Rights Standards and Their Impact on Forensic Psychologists, the Practice of Forensic Psychology, and the Conditions of Institutionalization of Persons with Mental Disabilities

For years, considerations of the relationship between international human rights standards and the work of forensic psychologists have focused on the role of organized psychology in prisoner abuse at Guantanamo Bay and Abu Ghirab. That issue has been widely discussed and debated, and these discussions show no sign of abating. But there has been virtually no attention given to another issue of international human rights, one that grows in importance each year: how the treatment (especially, the institutional treatment) of persons with mental and intellectual disabilities violates international human rights law, and the silence of organized forensic psychology in the face of this mistreatment. This issue has become even more pointed in recent years, following the ratification of the United Nations’ Convention on the Rights of Persons with Disabilities. Organized forensic psychology has remained largely silent about the potential significance of this Convention and about how it demands that we rethink the way we institutionalize persons – often in brutal and barbaric conditions – around the world. In many parts of the world, circumstances are bleak: services are provided in segregated settings that cut people off from society, often for life; persons are arbitrarily detained from society and committed to institutions without any modicum of due process; individuals are denied the ability to make choices about their lives when they are put under plenary guardianship; there is a wide-spread denial of appropriate medical care or basic hygiene in psychiatric facilities, individuals are subject to powerful and often-dangerous psychotropic medications without adequate standards, and there is virtually no human rights oversight and enforcement mechanisms to protect against the broad range of institutional abuse. Although there is a robust literature developing – interestingly, mostly in Australia and New Zealand, but little in the US – about how such institutional conditions violate the international human rights of this population, virtually nothing has been written about howorganized forensic psychology has been silent about these abuses. In this paper, I (1) discuss the relevant international human rights law that applies to these questions, (2) examine the current state of conditions in institutions worldwide, (3) argue why forensic psychology needs to become more aggressively involved in this area, and (4) offer some suggestions as to how this situation can be ameliorated

I Hope the Final Judgment’s Fair: Alternative Jurisprudences, Legal Decision-Making, and Justice

At the core of any legal decision is an assumption that the decision will be “fair,” yet this is an elusive term. A close study of cases involving criminal defendants with mental disabilities shows that many (perhaps most) of the decisions involving this cohort are not “fair” in the contexts of due process and justice. If legal decisions reflect principles such as procedural justice, restorative justice, and therapeutic jurisprudence, the chances of such fairness will be significantly enhanced. This chapter explains why this goal of fairness, in the context of these cases, can never be met absent a consideration of the virulence of sanism and pretextuality, along with the misuse of heuristics and false “ordinary common sense.” These factors enable much of society to ignore gray areas of human behavior, and predispose fact-finders to endorse beliefs in accord with their prior experiences